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EnglishMOBILITY -> Wheels and tires for your BMW 4 Series 2013-2020
Wheels and tires
MOBILITY
Wheels and tires
Tire inflation pressure
specifications
Vehicle features and
options
In the tire inflation pressure table
The tire inflation pressure table, refer to
page 247, contains all tire inflation pressure
specifications for the specified tire sizes at the
ambient temperature. The tire inflation pressure
values apply to tire sizes approved by the manu‐
facturer of the vehicle for the vehicle type.
This chapter describes all standard, country-spe‐
cific and optional features offered with the series.
It also describes features that are not necessarily
available in your vehicle, e. g., due to the selected
options or country versions. This also applies to
safety-related functions and systems. When us‐
ing these functions and systems, the applicable
laws and regulations must be observed.
To identify the correct tire inflation pressure,
please note the following:
▷ Tire sizes of your vehicle.
Tire inflation pressure
▷ Maximum permitted driving speed.
General information
The tire inflation pressure and tire characteristics
influence the following:
Checking the tire inflation
pressure
▷ The service life of the tires.
▷ Road safety.
General information
Tires heat up while driving. The tire inflation
pressure increases with the tire temperature.
▷ Driving comfort.
Tires have a natural, consistent loss of tire infla‐
tion pressure.
▷ Driving dynamics.
▷ Fuel consumption.
The displays of inflation devices may under-read
by up to 0.1 bar/2 psi.
Safety information
Checking using tire inflation
pressure specifications in the tire
inflation pressure table
The tire inflation pressure specifications in the
tire inflation pressure table only relate to cold
tires or tires at the same temperature as the am‐
bient temperature.
WARNING
A tire with too little or no tire inflation pressure
may heat up significantly and sustain damage.
This will have a negative impact on aspects of
handling, such as steering and braking re‐
sponse. There is a risk of an accident. Regularly
check the tire inflation pressure, and correct it
as needed, for instance twice a month and be‐
fore a long trip.
Only check the tire inflation pressure levels when
the tires are cold, i.e.:
▷ Driving range of max. 1.25 miles/2 km has not
been exceeded.
246
Wheels and tires
MOBILITY
▷ If the vehicle has not moved again for at least
2 hours after a trip.
Tire inflation pressure values up
to 100 mph/160 km/h
1. Determine, refer to page 246, the intended
tire inflation pressure levels for the mounted
tires.
430i, 430i xDrive
Tire size
Pressure specifica‐
tions in bar/PSI
2. Check the tire inflation pressure in all four
tires, using a pressure gage, for example.
3. Correct the tire inflation pressure if the cur‐
rent tire inflation pressure value deviates from
the specified value.
Specifications in
bar/PSI with cold
tires
4. Check whether all valve caps are screwed
onto the tire valves.
225/50 R 17 94 V
M+S A/S RSC
2.2 / 32
2.4 / 35
After correcting the tire inflation
pressure
For run-flat tires: reinitialize run-flat tires.
225/45 R 18 91 V
M+S A/S RSC
225/45 R 18 91 Y
RSC
For the Tire Pressure Monitor TPM: reset the
Tire Pressure Monitor TPM.
225/50 R 17 94 H
M+S RSC
Tire inflation pressures up to
100 mph/160 km/h
For speeds of up to 100 mph/160 km/h and for
optimum driving comfort, note the pressure val‐
ues in the tire inflation pressure table, refer to
page 247, and adjust as necessary.
225/45 R 18 95 V
M+S XL RSC
225/40 R 19 93 V
M+S XL A/S RSC
2.2 / 32
2.6 / 38
Front: 225/45 R 18 2.2 / 32
91 Y RSC
-
Rear: 255/40 R 18
95 Y RSC
-
2.2 / 32
Front: 225/45 ZR
18 95 Y XL Std
2.2 / 32
-
Rear: 255/40 ZR 18 -
99 Y XL Std
2.2 / 32
These pressure values can also be found on the
tire inflation pressure label on the driver's door
pillar.
Front: 225/40 R 19 2.2 / 32
89 Y RSC
-
Rear: 255/35 R 19
92 Y RSC
-
2.4 / 35
-
Do not exceed a speed of 100 mph/160 km/h.
Front: 225/35 R 20 2.4 / 35
90 Y XL RSC
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Wheels and tires
MOBILITY
Tire size
Pressure specifica‐
tions in bar/PSI
Tire size
Pressure specifica‐
tions in bar/PSI
Rear: 255/30 R 20
92 Y XL RSC
-
2.8 / 41
Front: 225/35 R 20 2.6 / 38
90 Y XL RSC
-
Rear: 255/30 R 20
92 Y XL RSC
-
3.0 / 44
Emergency wheel: Speed up to a max. of
50 mph / 80 km/h
T 135/80 R 17 102
M
4.2 / 60
Emergency wheel: Speed up to a max. of
50 mph / 80 km/h
T 135/80 R 17 102
440i, 440i xDrive
M
4.2 / 60
Tire size
Pressure specifica‐
tions in bar/PSI
Tire inflation pressures at max.
speeds above 100 mph/160 km/h
Specifications in
bar/PSI with cold
tires
WARNING
In order to drive at maximum speeds in excess
of 100 mph/160 km/h, please observe, and, if
necessary, adjust tire pressures for speeds ex‐
ceeding 100 mph/160 km/h from the relevant
table on the following pages. Otherwise, tire
damage and accidents could occur.
225/45 R 18 91 V 2.2 / 32
M+S A/S RSC
2.4 / 35
225/45 R 18 91 Y
RSC
225/50 R 17 94 H
M+S RSC
For speeds over 100 mph/160 km/h and for opti‐
mum driving comfort, note the pressure values in
the tire inflation pressure table, refer to
225/45 R 18 95 V
M+S XL RSC
page 248, and adjust as necessary.
225/40 R 19 93 V 2.4 / 35
M+S XL A/S RSC
2.6 / 38
Tire inflation pressure values
over 100 mph/160 km/h
Front: 225/45 R 18 2.2 / 32
91 Y RSC
-
430i, 430i xDrive
Without high-speed tuning feature
Rear: 255/40 R 18
95 Y RSC
-
2.4 / 35
Front: 225/45 ZR
18 95 Y XL Std
2.2 / 32
-
-
Rear: 255/40 ZR
18 99 Y XL Std
2.4 / 35
-
Front: 225/40 R 19 2.4 / 35
89 Y RSC
Rear: 255/35 R 19
92 Y RSC
-
2.6 / 38
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Wheels and tires
MOBILITY
With high-speed tuning feature
Tire size
Pressure specifica‐
tions in bar/PSI
Tire size
Pressure specifica‐
tions in bar/PSI
Specifications in
bar/PSI with cold
tires
Specifications in
bar/PSI with cold
tires
225/50 R 17 94 V
M+S A/S RSC
2.4 / 35
2.6 / 38
2.9 / 42
3.1 / 45
225/50 R 17 94 H 2.4 / 35
M+S RSC
2.9 / 42
3.1 / 45
225/50 R 17 94 H
M+S RSC
225/45 R 18 91 Y 2.6 / 38
RSC
225/45 R 18 91 V
M+S A/S RSC
225/45 R 18 95 V
M+S XL RSC
225/45 R 18 91 Y
RSC
Front: 225/45 R 18 2.4 / 35
91 Y RSC
-
225/45 R 18 95 V
M+S XL RSC
Rear: 255/40 R 18
95 Y RSC
-
2.7 / 39
225/40 R 19 93 V
M+S XL A/S RSC
Front: 225/45 ZR
18 95 Y XL Std
2.4 / 35
-
-
Front: 225/45 R 18 2.4 / 35
91 Y RSC
-
Rear: 255/40 ZR
18 99 Y XL Std
2.7 / 39
Rear: 255/40 R 18
95 Y RSC
-
2.7 / 39
Front: 225/40 R 19 2.4 / 35
89 Y RSC
-
Front: 225/45 ZR
18 95 Y XL Std
2.4 / 35
-
Rear: 255/35 R 19
92 Y RSC
2.7 / 39
-
Rear: 255/40 ZR 18 -
99 Y XL Std
2.7 / 39
Front: 225/35 R 20 2.6 / 38
90 Y XL RSC
Front: 225/40 R 19 2.4 / 35
89 Y RSC
-
Rear: 255/30 R 20
92 Y XL RSC
-
3.1 / 45
Rear: 255/35 R 19
92 Y RSC
-
2.7 / 39
-
Emergency wheel: Speed up to a max. of
Front: 225/35 R 20 2.6 / 38
90 Y XL RSC
50 mph / 80 km/h
T 135/80 R 17
102 M
4.2 / 60
Rear: 255/30 R 20
92 Y XL RSC
-
3.1 / 45
440i, 440i xDrive
Without high-speed tuning feature
Emergency wheel: Speed up to a max. of
50 mph / 80 km/h
T 135/80 R 17 102
M
4.2 / 60
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Wheels and tires
MOBILITY
Tire size
Pressure specifica‐
tions in bar/PSI
Tire size
Pressure specifica‐
tions in bar/PSI
Specifications in
bar/PSI with cold
tires
Specifications in
bar/PSI with cold
tires
225/50 R 17 94 H 2.5 / 36
M+S RSC
3.0 / 44
3.2 / 46
225/50 R 17 94 H 2.5 / 36
M+S RSC
3.0 / 44
3.2 / 46
225/45 R 18 91 V 2.7 / 39
M+S A/S RSC
225/45 R 18 91 Y 2.7 / 39
RSC
225/45 R 18 91 Y
RSC
225/45 R 18 95 V
M+S XL RSC
225/45 R 18 95 V
M+S XL RSC
Front:
225/45 R 18 91 Y
RSC
2.5 / 36
-
225/40 R 19 93 V 2.9 / 42
M+S XL A/S RSC
3.2 / 46
Rear: 255/40 R 18
95 Y RSC
-
2.8 / 41
Front: 225/45 R 18 2.5 / 36
91 Y RSC
-
Front: 225/45 ZR
18 95 Y XL Std
2.5 / 36
-
-
Rear: 255/40 R 18
95 Y RSC
-
2.8 / 41
Rear: 255/40 ZR
18 99 Y XL Std
2.8 / 41
-
Front: 225/45 ZR
18 95 Y XL Std
2.5 / 36
-
-
Front:
225/40 R 19 89 Y
RSC
2.7 / 39
Rear: 255/40 ZR
18 99 Y XL Std
2.8 / 41
Rear: 255/35 R 19
92 Y RSC
-
2.8 / 41
-
Front: 225/40 R 19 2.7 / 39
89 Y RSC
-
Front: 225/35
R 20 90 Y XL RSC
2.9 / 42
-
Rear: 255/35 R 19
92 Y RSC
-
2.8 / 41
-
Rear: 255/30 R 20
92 Y XL RSC
3.4 / 49
Front: 225/35 R 20 2.9 / 42
90 Y XL RSC
Emergency wheel: Speed up to a max. of
Rear: 255/30 R 20
92 Y XL RSC
-
3.4 / 49
50 mph / 80 km/h
T 135/80 R 17
102 M
4.2 / 60
Emergency wheel: Speed up to a max. of
50 mph / 80 km/h
T 135/80 R 17 102
M
4.2 / 60
With high-speed tuning feature
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Wheels and tires
MOBILITY
Tire age
Tire identification marks
Recommendation
Regardless of the tire tread, replace tires at least
every 6 years.
Tire size
245/45 R 18 96 Y
245: nominal width in mm
45: aspect ratio in %
Manufacture date
You can find the manufacture date of the tire on
the tire's sidewall.
R: radial tire code
18: rim diameter in inches
96: load rating, not for ZR tires
Y: speed rating, before the R on ZR tires
Designation
Manufacture date
DOT … 0118
1st week, 2018
Maximum tire load
Maximum tire load is the maximum permissible
weight for which the tire is approved.
Uniform Tire Quality Grading
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width.
Locate the maximum tire load on the tire sidewall
and the Gross Axle Weight Rating – GAWR – on
the certification label on the driver’s door pillar.
E.g.: Treadwear 200; Traction AA; Temperature
A
Divide the tire load by 1.1. It must be greater
than one-half of the vehicle’s Gross Axle Weight
Rating – GAWR. Note, front vs. rear GAWR and
tire loads, respectively.
DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B C
Speed letter
Q = up to 100 mph/160 km/h
R = up to 106 mph/170 km/h
S = up to 112 mph/180 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
All passenger vehicle tires must conform to Fed‐
eral Safety Requirements in addition to these
grades.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov‐
ernment test course. E.g., a tire graded 150
would wear one and one-half, 1 g, times as well
on the government course as a tire graded 100.
The relative performance of tires depends upon
the actual conditions of their use, however, and
may depart significantly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate.
Tire Identification Number
DOT code: DOT xxxx xxx 0118
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
0118: tire age
Tires with DOT codes meet the guidelines of the
U.S. Department of Transportation.
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Wheels and tires
MOBILITY
Traction
M+S
The traction grades, from highest to lowest, are
AA, A, B, and C.
Winter and all-season tires with better cold
weather performance than summer tires.
Those grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test surfa‐
ces of asphalt and concrete. A tire marked C may
have poor traction performance.
Tire tread
Summer tires
The traction grade assigned to this tire is based
on straight-ahead braking traction tests, and
does not include acceleration, cornering, hydro‐
planing, or peak traction characteristics.
Do not drive with a tire tread of less than
0.12 in/3 mm, otherwise there is an increased
risk of hydroplaning.
Winter tires
Do not drive with a tire tread of less than
0.16 in/4 mm, as such tires are less suitable for
winter operation.
Temperature
The temperature grades are A, the highest, B,
and C, representing the tire's resistance to the
generation of heat and its ability to dissipate heat
when tested under controlled conditions on a
specified indoor laboratory test wheel. Sustained
high temperature can cause the material of the
tire to degenerate and reduce tire life, and exces‐
sive temperature can lead to sudden tire failure.
The grade C corresponds to a level of perform‐
ance which all passenger vehicle tires must meet
under the Federal Motor Vehicle Safety Standard
No. 109. Grades Band A represent higher levels
of performance on the laboratory test wheel than
the minimum required by law.
Minimum tread depth
Wear indicators are distributed around the tire's
circumference and have the legally required min‐
imum height of 0.063 inches/1.6 mm.
WARNING
The temperature grade for this tire is estab‐
lished for a tire that is properly inflated and not
overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in com‐
bination, can cause heat buildup and possible
tire failure.
The positions of the wear indicators are marked
on the tire sidewall with TWI, Tread Wear Indica‐
tor.
Tire damage
RSC – Run-flat tires
Run-flat tires, refer to page 255, are labeled with
a circular symbol containing the letters RSC
marked on the sidewall.
General information
Inspect your tires regularly for damage, foreign
objects lodged in the tread, and tread wear.
Driving over rough or damaged road surfaces, as
well as debris, curbs and other obstacles can
252
Wheels and tires
MOBILITY
cause serious damage to wheels, tires and sus‐
pension parts. This is more likely to occur with
low-profile tires, which provide less cushioning
between the wheel and the road. Be careful to
avoid road hazards and reduce your speed, es‐
pecially if your vehicle is equipped with low-pro‐
file tires.
ger of accidents and property damage. If possi‐
ble, drive around obstacles, or drive over them
slowly and carefully.
Changing wheels and tires
Indications of tire damage or other vehicle mal‐
functions:
Mounting
Have mounting and wheel balancing carried out
by a dealer’s service center or another qualified
service center or repair shop.
▷ Unusual vibrations.
▷ Unusual tire or running noises.
▷ Unusual handling such as a strong tendency
to pull to the left or right.
Wheel and tire combination
General information
You can ask the dealer’s service center or an‐
other qualified service center or repair shop
about the correct wheel/tire combination and
wheel rim versions for the vehicle.
Damage can be caused by the following situa‐
tions, for instance:
▷ Driving over curbs.
▷ Road damage.
▷ Tire inflation pressure too low.
▷ Vehicle overloading.
▷ Incorrect tire storage.
Safety information
Safety information
WARNING
Wheels and tires which are not suitable for your
vehicle can damage parts of the vehicle, for in‐
stance due to contact with the body due to tol‐
erances despite the same official size rating.
There is a risk of an accident. The manufac‐
turer of your vehicle strongly suggests that you
use wheels and tires that have been recom‐
mended by the vehicle manufacturer for your
vehicle type.
WARNING
Damaged tires can lose tire inflation pressure,
which can lead to loss of vehicle control. There
is a risk of an accident. If tire damage is sus‐
pected while driving, immediately reduce speed
and stop. Have wheels and tires checked. For
this purpose, drive carefully to the nearest deal‐
er’s service center or another qualified service
center or repair shop. Have vehicle towed or
transported as needed. Do not repair damaged
tires, but have them replaced.
WARNING
Incorrect wheel/tire combinations will have a
negative impact on the vehicle's handling and
on the function of a variety of systems, such as
ABS or DSC. There is a risk of an accident. To
maintain good handling and vehicle response,
use only tires with a single tread configuration
from a single manufacturer. The manufacturer
of the vehicle recommends that you use
WARNING
Tires can become damaged by driving over ob‐
stacles, e.g., curbs or road damage, at high
speed. Larger wheels have a smaller tire cross-
section. The smaller the tire cross-section, the
higher the risk of tire damage. There is a dan‐
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Wheels and tires
MOBILITY
wheels and tires that have been recommended
by the vehicle manufacturer for your vehicle
type. Following tire damage, have the original
wheel/tire combination remounted on the vehi‐
cle as soon as possible.
Winter tires
Winter tires are recommended for operating on
winter roads.
Although so-called all-season M+S tires provide
better winter traction than summer tires, they
usually do not provide the same level of perform‐
ance as winter tires.
Recommended tire brands
Maximum speed of winter tires
If the maximum speed of the vehicle is higher
than the permissible speed for the winter tires,
then attach a label showing the permissible maxi‐
mum speed in the field of view. The label is avail‐
able from a dealer’s service center or another
qualified service center or repair shop.
With winter tires mounted, observe and do not
exceed the permissible maximum speed.
For each tire size, the manufacturer of the vehi‐
cle recommends certain tire brands. The tire
brands can be identified by a star on the tire
sidewall.
Run-flat tires
If you are already using run-flat tires, for your own
safety you should replace them only with the
same kind. No spare tire is available in the case
of a flat tire. Further information is available from
a dealer’s service center or another qualified
service center or repair shop.
New tires
Tire traction is not optimal due to manufacturing
circumstances when tires are brand-new; they
achieve their full traction potential after a break-in
time.
Rotating wheels between axles
Drive conservatively for the first
200 miles/300 km.
Different wear patterns can occur on the front
and rear axles depending on individual driving
conditions. The tires can be rotated in pairs be‐
tween the axles to achieve even wear. Further in‐
formation is available from a dealer’s service cen‐
ter or another qualified service center or repair
shop. After rotating, check the tire pressure and
correct, if needed.
Retreaded tires
WARNING
Retreaded tires can have different tire casing
structures. With advanced age the service life
can be limited. There is a risk of an accident.
The manufacturer of your vehicle does not rec‐
ommend the use of retreaded tires.
Rotating the tires between the axes is not per‐
missible on vehicles with different tire sizes or
rim sizes on the front and rear axles.
The manufacturer of your vehicle does not rec‐
ommend the use of retreaded tires.
254
Wheels and tires
MOBILITY
Drive moderately and do not exceed a speed of
50 mph/80 km/h.
Storing tires
Air pressure
Do not exceed the maximum tire inflation pres‐
sure indicated on the side wall of the tire.
Label
Storage
Store wheels and tires in a cool, dry and dark
place.
Always protect tires against all contact with oil,
grease, and solvents.
Do not leave tires in plastic bags.
Remove dirt from wheels or tires.
The tires are marked on the tire sidewall with
RSC Run-flat System Component.
Run-flat tires
Concept
Run-flat tires permit continued driving under re‐
stricted conditions even in the event of a com‐
plete loss of tire inflation pressure.
Repairing a flat tire
Safety measures
▷ Park the vehicle as far away as possible from
passing traffic and on solid ground.
General information
The wheels consist of tires that are self-support‐
ing, to a limited degree, and possibly special
rims.
▷ Switch on the hazard warning system.
▷ Secure the vehicle against rolling away by
setting the parking brake.
▷ Turn the steering wheel until the front wheels
are in the straight-ahead position and engage
the steering wheel lock.
The support of the sidewall allows the tire to re‐
main drivable to a restricted degree in the event
of a tire inflation pressure loss.
▷ Have all vehicle occupants get out of the ve‐
hicle and ensure that they remain outside the
immediate area in a safe place, such as be‐
hind a guardrail.
Follow the instructions for continued driving with
a flat tire.
Safety information
▷ If necessary, set up a warning triangle at an
appropriate distance.
WARNING
Your vehicle handles differently with a run-flat
with no or low inflation pressure; for instance,
your lane stability when braking is reduced,
braking distances are longer and the self-steer‐
ing properties will change. There is a risk of an
accident.
Mobility System
Concept
With the Mobility System, minor tire damage can
be sealed temporarily to enable continued travel.
255
Wheels and tires
MOBILITY
To accomplish this, sealant is pumped into the
tires, which seals the damage from the inside.
Observe use-by date on the sealant container.
Compressor
General information
▷ Follow the instructions on using the Mobility
System found on the compressor and sealant
container.
▷ Use of the Mobility System may be ineffec‐
tive if the tire puncture measures approx.
1/8 inches/4 mm or more.
▷ Contact a dealer’s service center or another
qualified service center or repair shop if the
tire cannot be made drivable.
1
2
3
4
5
6
7
On/off switch
▷ If possible, do not remove foreign bodies that
have penetrated the tire. Only remove foreign
objects if they are visibly protruding from the
tire.
Sealant container holder
Reduce tire inflation pressure button
Tire pressure gage
▷ Pull the speed limit sticker off the sealant
container and apply it to the steering wheel.
Compressor
Connector/cable for socket
▷ The use of a sealant can damage the TPM
wheel electronics. In this case, have the TPM
wheel electronics replaced at the next oppor‐
tunity.
Connection hose — stowed in the bottom of
the compressor
Safety measures
▷ Park the vehicle as far away as possible from
passing traffic and on solid ground.
▷ The compressor can be used to check the
tire inflation pressure.
Storage
▷ Switch on the hazard warning system.
The Mobility System is located under the cargo
floor panel.
▷ Secure the vehicle against rolling away by
setting the parking brake.
▷ Turn the steering wheel until the front wheels
are in the straight-ahead position and engage
the steering wheel lock.
Sealant container
▷ Have all vehicle occupants get out of the ve‐
hicle and ensure that they remain outside the
immediate area in a safe place, such as be‐
hind a guardrail.
▷ If necessary, set up a warning triangle at an
appropriate distance.
▷ Sealant container, arrow 1.
▷ Filling hose, arrow 2.
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Wheels and tires
MOBILITY
2. Take the connection hose completely out of
the compressor housing. Do not kink the
hose.
Filling the tire with sealant
Safety information
DANGER
If the exhaust pipe is blocked or ventilation is in‐
sufficient, harmful exhaust gases can enter into
the vehicle. The exhaust gases contain pollu‐
tants which are colorless and odorless. In en‐
closed areas, exhaust gases can also accumu‐
late outside of the vehicle. There is danger to
life. Keep the exhaust pipe free and ensure suf‐
ficient ventilation.
3. Attach the connection hose to the connector
of the sealing container, ensuring that it en‐
gages audibly.
NOTE
The compressor can overheat during extended
operation. There is a risk of damage to prop‐
erty. Do not run the compressor for more than
10 minutes.
Filling
1. Shake the sealant container.
4. Slide the sealing container upright into the
holder on the compressor housing, ensuring
that it engages audibly.
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Wheels and tires
MOBILITY
5. Remove the valve cap from the tire valve and
screw the connection hose onto the tire valve
of the nonworking wheel.
If a tire inflation pressure of 2 bar is not reached:
1. Switch off the compressor.
2. Pull the connector out of the power socket
inside the vehicle.
3. Unscrew the filling hose from the tire valve.
4. Drive 33 ft/10 m forward and back to distrib‐
ute the sealant in the tire.
5. Inflate the tire again using the compressor.
If a tire inflation pressure of 2 bar cannot be
reached, contact your dealer’s service center
or another qualified service center or repair
shop.
6. With the compressor switched off, insert the
plug into a power socket inside the vehicle.
Stowing the Mobility System
1. Remove the connection hose of the sealant
container from the tire valve.
2. Pull the compressor connector out of the
socket inside the vehicle.
3. Remove the connection hose from the seal‐
ant container.
4. Wrap and store the sealant container and the
connection hose in suitable material to avoid
dirtying the cargo area.
7. With the ignition switched on or the engine
running, switch on the compressor.
5. Stow the Mobility System back in the cargo
area.
Distributing the sealant
Immediately drive approx. 5 miles/10 km to en‐
sure that the sealant is evenly distributed in the
tire.
Do not exceed the permissible maximum speed
of 50 mph/80 km/h.
If possible, do not drive at speeds less than
12 mph/20 km/h.
Let the compressor run for max. 10 minutes to fill
the tire with sealant and achieve a tire inflation
pressure of approx. 2.5 bar.
While the tire is being filled with sealant, the tire
inflation pressure may sporadically reach approx.
5 bar. Do not switch off the compressor at this
point.
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Wheels and tires
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Correcting the tire inflation
pressure
Continuing the trip
Do not exceed the maximum permissible speed
of 50 mph/80 km/h.
1. Stop at a suitable location.
Reinitialize the run-flat tires.
2. Screw the connection hose onto the tire
valve stem.
Reset the Tire Pressure Monitor TPM.
Replace the nonworking tire and the sealant con‐
tainer of the Mobility System at the next opportu‐
nity.
Snow chains
Safety information
WARNING
3. Attach the connection hose directly to the
compressor.
With the mounting of snow chains on unsuita‐
ble tires, the snow chains can come into con‐
tact with vehicle parts. There is a risk of acci‐
dents or risk of damage to property. Only
mount snow chains on tires that are designated
by their manufacturer as suitable for the use of
snow chains.
WARNING
4. Insert the connector into the power socket in‐
side the vehicle.
Insufficiently tight snow chains may damage
tires and vehicle components. There is a risk of
accidents or risk of damage to property. Make
sure that the snow chains are always suffi‐
ciently tight. Re-tighten as needed according to
the snow chain manufacturer's instructions.
Fine-link snow chains
The manufacturer of your vehicle recommends
use of fine-link snow chains. Certain types of
fine-link snow chains have been tested by the
manufacturer of the vehicle and recommended
as road-safe and suitable.
5. Correct the tire inflation pressure to 2.5 bar.
▷ Increase tire inflation pressure: with the ig‐
nition switched on or the engine running,
switch on the compressor.
Information regarding suitable snow chains is
available from a dealer’s service center or an‐
other qualified service center or repair shop.
▷ Reduce tire inflation pressure: press the
button on the compressor.
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Wheels and tires
MOBILITY
life. If the vehicle is raised, do not lie under the
vehicle and do not start the engine.
Use
Use only in pairs on the rear wheels, equipped
with the tires of the following size:
▷ 225/50 R 17.
▷ 225/45 R 18.
DANGER
Supports such as wooden blocks under the ve‐
hicle jack reduce the capacity of the vehicle
jack to bear weight. They have the potential to
exert too much strain on the vehicle jack, caus‐
ing it to tip over and the vehicle to fall. There is
a risk of injuries or danger to life. Do not place
supports under the vehicle jack.
Follow the snow chain manufacturer's instruc‐
tions.
Do not initialize the run-flat tires after mounting
snow chains, as doing so may result in incorrect
readings.
Do not reset the Tire Pressure Monitor TPM af‐
ter mounting snow chains, as doing so may re‐
sult in incorrect readings.
WARNING
When driving with snow chains, briefly activate
Dynamic Traction Control DTC, if needed.
The jack, issued by the vehicle manufacturer, is
provided in order to perform a wheel change in
the event of a breakdown. The jack is not de‐
signed for frequent use; for example, changing
from summer to winter tires. Using the jack fre‐
quently may cause it to become jammed or
damaged. There is a risk of injury and risk of
damage to property. Only use the jack to attach
an emergency or spare wheel in the event of a
breakdown.
Maximum speed with snow
chains
Do not exceed a speed of 30 mph/50 km/h when
using snow chains.
Changing wheels/tires
General information
When using run-flat tires or a flat tire kit, a wheel
does not always need to be changed immedi‐
ately when there is a loss of tire inflation pressure
due to a flat tire.
WARNING
On soft, uneven or slippery ground, for example
snow, ice, tiles, etc., the vehicle jack can slip
away. There is a risk of injury. If possible,
change the wheel on a flat, solid, and slip-re‐
sistant surface.
If needed, the tools for changing wheels are
available as accessories from a dealer’s service
center or another qualified service center or re‐
pair shop.
WARNING
Safety information
The vehicle jack is optimized for lifting the vehi‐
cle and for the jacking points on the vehicle
only. There is a risk of injury. Do not lift any
other vehicle or cargo using the vehicle jack.
DANGER
The vehicle jack is only provided for short-term
lifting of the vehicle for wheel changes. Even if
all safety measures are observed, there is a risk
of the raised vehicle falling, if the vehicle jack
tips over. There is a risk of injuries or danger to
260
Wheels and tires
MOBILITY
On a slight downhill gradient
WARNING
If the vehicle jack is not inserted into the jacking
point provided for this purpose, the vehicle may
be damaged or the vehicle jack may slip when
it is being cranked up. There is a risk of injury or
risk of damage to property. When cranking up
the vehicle jack, ensure that it is inserted in the
jacking point next to the wheel housing.
If you need to change a wheel on a slight down‐
hill grade, place chocks and other suitable ob‐
jects, for instance a rock, under the wheels of
both the front and rear axles against the rolling
direction.
WARNING
A vehicle that is raised on a vehicle jack may fall
off of the jack if lateral forces are exerted on it.
There is a risk of injury and risk of damage to
property. While the vehicle is raised, do not ex‐
ert lateral forces on the vehicle or pull abruptly
on the vehicle. Have a stuck wheel removed by
a dealer’s service center or another qualified
service center or repair shop.
Lug bolt lock
Concept
The wheel lug bolts have a special coding. The
lug bolts can only be released with the adapter
which matches the coding.
Securing the vehicle against
rolling
Overview
General information
The adapter of the lug bolt lock is in the onboard
vehicle tool kit or in a storage compartment close
to the onboard vehicle tool kit.
The vehicle manufacturer recommends to addi‐
tionally secure the vehicle against rolling away
when changing a wheel.
On a level surface
▷ Lug bolt, arrow 1.
▷ Adapter, arrow 2.
Place chocks or other suitable objects, for exam‐
ple a rock, in front of and behind the wheel that is
diagonally opposite to the wheel that you wish to
change.
Unscrewing
1. Attach the adapter to the lug bolt.
2. Unscrew the lug bolt.
261
Wheels and tires
MOBILITY
3. Remove the adapter after unscrewing the lug
bolt.
Jacking points for the vehicle
jack
Screwing on
1. Attach the adapter to the lug bolt. If neces‐
sary, turn the adapter until it fits on the lug
bolt.
2. Screw on the lug bolt. The tightening torque
is 140 Nm.
3. Remove the adapter and stow it after screw‐
ing on the lug bolt.
The jacking points for the vehicle jack are lo‐
cated at the indicated positions.
Preparing the vehicle
▷ Park the vehicle on solid and non-slip ground
at a safe distance from traffic.
▷ Switch on the hazard warning system.
▷ Set the parking brake.
▷ Engage a gear or move the selector lever to
position P.
▷ As soon as permitted by the traffic flow, have
all vehicle occupants get out of the vehicle
and ensure that they remain outside the im‐
mediate area in a safe place, such as behind a
guardrail.
▷ Depending on the vehicle equipment, get
wheel change tools and, if necessary, the
emergency wheel from the vehicle.
▷ If necessary, set up a warning triangle or port‐
able hazard warning light at an appropriate
distance.
▷ Secure the vehicle additionally against rolling.
▷ Loosen the lug bolts a half turn.
262
Wheels and tires
MOBILITY
3. Extend the vehicle jack by turning the vehicle
jack crank or lever clockwise.
Jacking up the vehicle
WARNING
Hands and fingers can be jammed when using
the vehicle jack. There is a risk of injury. Com‐
ply with the described hand position and do not
change this position while using the vehicle
jack.
1. Hold the vehicle jack with one hand, arrow 1,
and grasp the vehicle jack crank with your
other hand, arrow 2.
4. Take your hand away from the vehicle jack as
soon as the vehicle jack is under load and
continue turning the vehicle jack crank or
lever with one hand.
5. Make sure that the vehicle jack foot stands
vertically and at a right angle beneath the
jacking point.
2. Insert the vehicle jack into the rectangular re‐
cess of the jacking point closest to the wheel
to be changed.
6. Make sure that the vehicle jack foot stands
vertically and perpendicularly beneath the
jacking point after extending the vehicle jack.
7. Crank up the vehicle jack until the entire sur‐
face of the jack is in contact with the ground
and the wheel in question is raised a maxi‐
mum of 1.2 inches/3 cm off the ground.
263
Wheels and tires
MOBILITY
Mounting a wheel
Mount one emergency wheel only, as required.
1. Unscrew the lug bolts.
2. Remove the wheel.
3. Put the new wheel or emergency wheel on
and screw in at least two lug bolts in a cross‐
wise pattern until hand-tight.
If non-original light-alloy wheels of the vehicle
manufacturer are mounted, the accompany‐
ing lug bolts may have to be used as well.
4. Hand-tighten the remaining lug bolts and
tighten all lug bolts well in a crosswise pat‐
tern.
5. Turn the vehicle jack crank counterclockwise
to retract the vehicle jack and lower the vehi‐
cle.
6. Remove the vehicle jack and stow it securely.
After the wheel change
1. Tighten the lug bolts crosswise. The tighten‐
ing torque is 101 lb ft/140 Nm.
2. Stow the nonworking wheel in the cargo area,
if necessary.
The nonworking wheel cannot be stored un‐
der the cargo floor panel because of its size.
3. Check tire inflation pressure at the next op‐
portunity and correct as needed.
4. Reinitialize the run-flat tires.
Reset the Tire Pressure Monitor TPM.
5. Check to make sure the lug bolts are tight
with a calibrated torque wrench.
6. Have the damaged tire replaced at the near‐
est dealer’s service center or another quali‐
fied service center or repair shop.
264
