Tire sizePressure specifications
in bar/PSISpecifications in
bar/PSI with cold
tires225/50 R 17 94 H
M+S RSC2.7 / 393.2 / 46225/45 R 18 91 Y
RSC
225/45 R 18 95 V
M+S XL RSC2.8 / 413.3 / 48Front: 225/45 R 18
91 Y RSC
Rear: 255/40 R 18
95 Y RSC2.8 / 41
--
2.9 /42Front: 225/40 R 19
89 Y RSC
Rear: 255/35 R 19
92 Y RSC2.8 / 41
--
2.9 /42Front: 225/35 R 20
90 Y XL RSC
Rear: 255/30 R 20
92 Y XL RSC2.8 / 41
--
3.3 / 48Emergency 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 192MobilityWheels and tires192
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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 195Wheels and tiresMobility195
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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 17Seite 199Wheels and tiresMobility199
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Screwdriver, see Onboard ve‐hicle tool kit 209
Screw thread, see screw thread for tow fitting, screw
thread for tow fitting 223
Sealant 196
Seat and mirror memory 57
Seat belts, refer to Safety belts 54
Seat heating, front 54
Seat heating, rear 54
Seating position for chil‐ dren 61
Seats 51
Selection list in instrument cluster 87
Selector lever, Steptronic transmission 74
Sensors, care 227
Service and warranty 8
Service requirements, Condi‐ tion Based Service
CBS 207
Service requirements, dis‐ play 84
Services, ConnectedDrive
Servotronic 124
SET button, see Active Cruise Control, ACC 125
SET button, see Cruise con‐ trol 131
Settings, locking/unlock‐ ing 45
Settings on Control Dis‐ play 90
Settings, storing for seat, mir‐ ror 57
Shift paddles on the steering wheel 75
Side airbags 98
Side View 138
Signaling, horn 14
Signals when unlocking 45
Sitting safely 51
Size 230
Slide/tilt glass roof 49 Smallest turning radius 230
Snow chains 199
Socket 157
Socket, OBD Onboard Diag‐ nostics 208
SOS button 218
Spare fuse 216
Specified engine oil types 205
Speed, average 88
Speed limit detection, on- board computer 89
Speed limiter, display 86
Speed Limit Information 86
Speed warning 89
Split screen 23
SPORT+ - program, Dynamic Driving Control 123
Sport displays, torque dis‐ play, performance dis‐
play 89
SPORT program, Dynamic Driving Control 123
Sport program, transmis‐ sion 74
Sport steering, variable 122
Stability control systems 120
Start/stop, automatic func‐ tion 67
Start/Stop button 65
Start function during malfunc‐ tion 35
Starting the engine 66
Status control display, tires 102
Status information, iDrive 23
Status of Owner's Manual 7
Steering assistance 124
Steering wheel, adjusting 60
Steering wheel heating 60
Steptronic Sport transmis‐ sion, refer to Steptronic
transmission 73
Steptronic transmission 73
Stopping the engine 66 Storage compartment in the
rear 163
Storage compartments 161
Storage compartments, loca‐ tions 161
Storage, tires 196
Storing the vehicle 227
Suitable engine oils 205
Summer tires, tread 193
Sun visor 157
Supplementary text mes‐ sage 82
Surround View 136
Switch for Dynamic Driv‐ ing 122
Switch-on times, parked-car ventilation 152
Switch, refer to Cockpit 14
Symbols 6
Symbols in the status field 23
T Tachometer 82
Tailgate, automatic 40
Tailgate, closing with no- touch activation 44
Tailgate, emergency unlock‐ ing 42
Tailgate, hotel function 42
Tailgate, opening with no- touch activation 44
Tailgate via remote con‐ trol 38
Tail lights 212
Technical changes, refer to Safety 7
Technical data 230
Telephone, see user's manual for Navigation, Entertain‐
ment and Communication
Temperature, automatic cli‐ mate control 147, 149
Temperature display for ex‐ ternal temperature 83
Temperature, engine oil 82 Seite 241Everything from A to ZReference241
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