
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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