Tire sizePressure specifications
in bar/PSIFront: 225/40 R 19
89 Y RSC
Rear: 255/35 R 19
92 Y RSC2.7 / 39
--
3.0 / 44Front: 225/35 R 20
90 Y XL RSC
Rear: 255/30 R 20
92 Y XL RSC2.9 /42
--
3.4 / 49Compact wheel
T 135/80 R 17 102
MSpeed up to a max. of
50 mph / 80 km/h
4.2 / 60
With high-speed tuning feature
Tire sizePressure specifications
in bar/PSISpecifications in
bar/PSI with cold
tires225/45 R 18 91 Y
RSC
225/50 R 17 94 H
M+S RSC
225/45 R 18 95 V
M+S XL RSC2.7 / 393.2 / 46Front: 225/45 R 18
91 Y RSC
Rear: 255/40 R 18
95 Y RSC2.7 / 39
--
2.8 / 41Front: 225/40 R 19
89 Y RSC
Rear: 255/35 R 19
92 Y RSC2.7 / 39
--
3.0 / 44Tire sizePressure specifications
in bar/PSIFront: 225/35 R 20
90 Y XL RSC
Rear: 255/30 R 20
92 Y XL RSC2.9 /42
--
3.4 / 49Compact wheel
T 135/80 R 17 102
MSpeed up to a max. of
50 mph / 80 km/h
4.2 / 60
Tire identification marks
Tire size 245/45 R 18 96 Y
245: nominal width in mm
45: aspect ratio in %
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
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
Tire Identification Number
DOT code: DOT xxxx xxx 0814
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
0814: tire age
Seite 191Wheels and tiresMobility191
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Wheel and tire combination
You can ask the service center about the right
wheel/tire combination and wheel rim versions
for the vehicle.
Incorrect wheel and tire combinations impair
the function of a variety of systems such as
ABS or DSC.
To maintain good handling and vehicle re‐
sponse, use only tires with a single tread con‐
figuration from a single manufacturer.
Following tire damage, have the original wheel
and tire combination remounted on the vehicle
as soon as possible.
Approved wheels and tires
You should only use wheels and tires
that have been approved by the vehicle manu‐
facturer for your vehicle type; otherwise, for
example, despite having the same official size
ratings, variations can lead to body contact and
with it, the risk of severe accidents
The manufacturer of your vehicle cannot eval‐
uate non-approved wheels and tires to deter‐
mine if they are suited for use, and therefore
cannot ensure the operating safety of the vehi‐
cle if they are mounted.◀
Recommended tire brands
For each tire size, the manufacturer of your ve‐
hicle recommends certain tire brands. These
can be identified by a star on the tire sidewall.
With proper use, these tires meet the highest
standards for safety and handling.
New tires
Due to technical factors associated with their
manufacture, tires do not achieve their full
traction potential until after an initial breaking-
in period.
Drive conservatively for the first
200 miles/300 km.
Retreaded tires
The manufacturer of your vehicle does not rec‐
ommend the use of retreaded tires.
Retreaded tires
Possibly substantial variations in the de‐
sign and age of the tire casing structures can
limit service life and have a negative impact on
road safety.◀
Winter tires
Winter tires are recommended for operating on
winter roads.
Although so-called all-season M+S tires do
provide better winter traction than summer
tires, they do not provide the same level of per‐
formance as winter tires.
Maximum speed of winter tires If the maximum speed of the vehicle is higher
than the permissible speed for the winter tires,
then display a corresponding sign in the field
of vision. You can obtain this sign from the tire
specialist or from your service center.
Maximum speed for winter tires
Do not exceed the maximum speed for
the respective winter tires; otherwise, tire dam‐
age and accidents can occur.◀
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. Your service center will be
glad to advise you.Seite 194MobilityWheels and tires194
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Rotating wheels between axlesDifferent wear patterns can occur on the frontand rear axles depending on individual driving
conditions. The tires can be rotated between
the axles to achieve even wear. Your service
center will be glad to advise you. After rotating,
check the tire pressure and correct if neces‐
sary.
Rotating the tires is not permissible on vehi‐
cles with different tire sizes on the front and
rear axles, i.e. when using different types of
tires.
Storage
Store wheels and tires in a cool, dry place with
as little exposure to light as possible.
Always protect tires against all contact with oil,
grease and fuels.
Do not exceed the maximum tire inflation pres‐
sure indicated on the side wall of the tire.
Run-flat tires
Label
RSC label on the tire sidewall.
The wheels are composed of special rims and
tires that are self-supporting, to a limited de‐
gree.
The support of the sidewall allows the tire to
remain drivable to a restricted degree in the
event of a pressure loss.
FTM: continued driving with a damaged tire,
refer to page 102.
TPM: continued driving with a damaged tire,
refer to page 99.
Changing run-flat tires
For your own safety, only use run-flat tires. No
spare tire is available in the case of a flat tire.
Your service center will be glad to advise you.
Snow chains
Fine-link snow chains
Only certain types of fine-link snow chains
have been tested by the manufacturer of the
vehicle, classified as road-safe and approved.
Information about the approved snow chains
are available from the service center.
Use
Use only in pairs on the rear wheels, equipped
with the tires of the following size:▷205/60 R 16.▷225/55 R 16.▷225/50 R 17.▷225/45 R 18.
Follow the chain manufacturer's instructions.
Make sure that the snow chains are always
sufficiently tight. Retighten as needed accord‐
ing to the chain manufacturer's instructions.
Do not initialize the Flat Tire Monitor after
mounting snow chains, as doing so may result
in incorrect readings.
Do not initialize the Tire Pressure Monitor after
mounting snow chains, as doing so may result
in incorrect readings.
When driving with snow chains, briefly activate
Dynamic Traction Control if necessary.
Maximum speed with snow chains Do not exceed a speed of 30 mph/50 km/h
when using snow chains.
Seite 195Wheels and tiresMobility195
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Shifting, automatic transmis‐sion 69
Shifting, manual transmis‐ sion 69
Shift paddles on steering wheel 71
Side airbags 94
Side View 133
Signaling, horn 12
Signals when unlocking 41
Sitting safely 47
Size 228
Slide/tilt glass roof 45
Smallest turning circle 228
Snow chains 195
Socket 152
Socket, OBD Onboard Diag‐ nostics 202
Soot particulate filter 163
SOS button 215
Spare fuse 213
Specified engine oil types 200
Speed, average 84
Speed limit detection, on‐ board computer 85
Speed limiter, display 81
Speed Limit Information 81
Speed warning 85
Split screen 22
SPORT+ - program, Dynamic Driving Control 116
Sport automatic transmis‐ sion 71
Sport displays, torque dis‐ play, performance dis‐
play 85
SPORT program, Dynamic Driving Control 117
Sport program, transmis‐ sion 71
Sport steering, variable 116
Stability control systems 114
Start/stop, automatic func‐ tion 63
Start/Stop button 61 Start function during malfunc‐
tion 33
Starting the engine 62
Status control display, tires 97
Status information, iDrive 21
Status of Owner's Manual 6
Steering wheel, adjusting 56
Steering wheel heating 56
Steptronic, automatic trans‐ mission 69
Stopping the engine 62
Storage compartment in the rear 158
Storage compartments 156
Storage compartments, loca‐ tions 156
Storage, tires 195
Storing the vehicle 224
Summer tires, tread 193
Supplementary text mes‐ sage 77
Surround View 130
Switch for Dynamic Driv‐ ing 116
Switch-on times, parked-car ventilation 147
Switch, refer to Cockpit 12
Symbols 6
Symbols in the status field 21
T Tachometer 78
Tail lamp 210
Tail lamps 210, 212
Technical changes, refer to Safety 7
Technical data 228
Telephone, see user's manual for Navigation, Entertain‐
ment and Communication
Temperature, automatic cli‐ mate control 142, 144
Temperature display for ex‐ ternal temperature 79 Temperature, engine oil 78
Tempomat, refer to Active Cruise Control 119
Terminal, starting aid 217
Text message, supplemen‐ tary 77
Theft alarm system, refer to Alarm system 41
Thigh support 49
Through-loading system 154
Tilt alarm sensor 42
Time of arrival 85
Tire damage 193
Tire identification marks 191
Tire inflation pressure 185
Tire inflation pressure moni‐ tor, refer to FTM 100
Tire Pressure Monitor TPM 97
Tires, changing 193
Tires, everything on wheels and tires 185
Tires, run-flat tires 195
Tire tread 193
Tone, see user's manual for Navigation, Entertainment
and Communication
Tool 204
Top View 134
Total vehicle weight 228
Touchpad 19
Tow fitting 219
Towing 218
Tow-starting 218
Tow truck 218
TPM Tire Pressure Moni‐ tor 97
Traction control 115
TRACTION program, Dy‐ namic Driving Control 115
Transmission, automatic 69
Transmission, manual 69
Transporting children safely 57
Tread, tires 193
Trip computer 85 Seite 239Everything from A to ZReference239
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