Tire sizePressure specifications
in bar/PSISpecifications in
bar/PSI with cold
tires225/50 R 17 94 H
M+S RSC2.5 / 363.0 / 44225/45 R 18 91 Y
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 RSC2.5 / 36
--
2.8 / 41Front: 225/40 R 19
89 Y RSC
Rear: 255/35 R 19
92 Y RSC2.7 / 39
--
2.8 / 41Front: 225/35 R 20
90 Y XL RSC
Rear: 255/30 R 20
92 Y XL RSC2.9 /42
--
3.4 / 49Emergency 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 NumberDOT code: DOT xxxx xxx 0115
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
0115: tire age
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
Tire age DOT … 0115: the tire was manufactured in the
1st week of 2015.
Recommendation
Regardless of wear and tear, replace tires at
least every 6 years.
Uniform Tire Quality Grading Quality grades can be found where applicable
on the tire sidewall between tread shoulder
and maximum section width.
For example: Treadwear 200; Traction AA;
Temperature A
DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B CSeite 190MobilityWheels and tires190
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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, e.g.,
despite having the same official size ratings,
variations can lead to chassis 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 guarantee the operating safety of the
vehicle.◀
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 Tire traction is not optimal due to manufactur‐
ing circumstances when tires are brand-new;
they achieve their full traction potential after a
break-in time.
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 pro‐
vide better winter traction than summer tires, they do not provide the same level of perform‐
ance 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 a respective symbol is displayed in your
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.
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 needed.
Rotating the tires is not permissible on vehi‐
cles with different tire sizes or rim sizes on the
front and rear axles.Seite 193Wheels and tiresMobility193
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3.Wrap the empty sealant container and con‐
nection hose in suitable material to avoid
dirtying the cargo area.4.Stow the Mobility System back in the vehi‐
cle.
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 a speed of 50 mph/80 km/h.
If possible, do not drive at speeds less than
12 mph/20 km/h.
To correct the tire inflation pressure
1.Stop at a suitable location.2.Screw the connection hose onto the tire
valve stem.3.Attach the connection hose directly to the
compressor.4.Insert the connector into a power socket
inside the vehicle.5.Correct the tire inflation pressure to
2.5 bar.▷Increase pressure: with the ignition
turned on or the engine running, reel
on the compressor.▷To reduce the pressure: press the but‐
ton on the compressor.
Continuing the trip
Do not exceed the maximum permissible
speed of 50 mph/80 km/h.
Reinitialize the Flat Tire Monitor.
Reinitialize the Tire Pressure Monitor.
Replace the defective tire and the sealant con‐
tainer of the Mobility System as soon as possi‐
ble.
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:
▷225/50 R 17.Seite 197Wheels and tiresMobility197
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Selection list in instrumentcluster 85
Selector lever, Steptronic transmission 72
Sensors, care 225
Service and warranty 8
Service requirements, Condi‐ tion Based Service
CBS 205
Service requirements, dis‐ play 82
Services, ConnectedDrive
Servotronic 122
SET button, see Active Cruise Control, ACC 123
SET button, see Cruise con‐ trol 129
Settings, locking/unlock‐ ing 43
Settings on Control Dis‐ play 88
Settings, storing for seat, mir‐ ror 55
Shift paddles on the steering wheel 73
Side airbags 96
Side View 136
Signaling, horn 14
Signals when unlocking 44
Sitting safely 49
Size 228
Slide/tilt glass roof 47
Smallest turning radius 228
Snow chains 197
Socket 155
Socket, OBD Onboard Diag‐ nostics 206
SOS button 216
Spare fuse 214
Specified engine oil types 203
Speed, average 86
Speed limit detection, on- board computer 87
Speed limiter, display 84
Speed Limit Information 84 Speed warning 87
Split screen 23
SPORT+ - program, Dynamic Driving Control 121
Sport displays, torque dis‐ play, performance dis‐
play 87
SPORT program, Dynamic Driving Control 121
Sport program, transmis‐ sion 72
Sport steering, variable 120
Stability control systems 118
Start/stop, automatic func‐ tion 65
Start/Stop button 63
Start function during malfunc‐ tion 35
Starting the engine 64
Status control display, tires 100
Status information, iDrive 23
Status of Owner's Manual 7
Steering assistance 122
Steering wheel, adjusting 58
Steering wheel heating 58
Steptronic Sport transmis‐ sion, refer to Steptronic
transmission 71
Steptronic transmission 71
Stopping the engine 64
Storage compartment in the rear 161
Storage compartments 159
Storage compartments, loca‐ tions 159
Storage, tires 194
Storing the vehicle 225
Suitable engine oils 203
Summer tires, tread 191
Sun visor 155
Supplementary text mes‐ sage 80
Surround View 134
Switch for Dynamic Driv‐ ing 120 Switch-on times, parked-car
ventilation 150
Switch, refer to Cockpit 14
Symbols 6
Symbols in the status field 23
T Tachometer 80
Tail lights 210
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 145, 147
Temperature display for ex‐ ternal temperature 81
Temperature, engine oil 80
Tempomat, refer to Active Cruise Control 123
Terminal, starting aid 218
Text message, supplemen‐ tary 80
Theft alarm system, refer to Alarm system 44
Thigh support 51
Through-loading system 157
Tilt alarm sensor 45
Time of arrival 87
Tire damage 192
Tire identification marks 190
Tire inflation pressure 186
Tire inflation pressure moni‐ tor, refer to FTM 103
Tire Pressure Monitor TPM 99
Tires, changing 192
Tire sealant 194
Tires, everything on wheels and tires 186
Tires, run-flat tires 194
Tire tread 191 Seite 239Everything from A to ZReference239
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