Tire sizePressure specifications in
bar/PSISpecifications in
bar/PSI with cold
tires205/50 R 17 89
H M+S RSC
225/45 R 17 91
H M+S RSC2.7 / 393.1 / 45225/40 R 18 92
V M+S XL RSC2.8 / 413.2 / 46Front: 225/40 R
18 88 Y Std
Rear: 245/35 R
18 92 Y XL Std2.5 / 36
--
2.9 /42Front: 225/40
R 18 88 Y RSC
Rear: 245/35
R 18 88 Y RSC2.5 / 36
--
2.9 /42Front: 225/35
R 19 88 Y XL
RSC
Rear: 245/30
R 19 89 Y XL
RSC2.9 /42
--
3.2 / 46Emergency
wheel:
T 125/80 R 17
99 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 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 CSeite 176MobilityWheels and tires176
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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 179Wheels and tiresMobility179
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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:
▷205/55 R 16.Seite 183Wheels and tiresMobility183
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        Pressure, tire air pres‐sure  172 
Pressure warning, tires  102 
Profile, refer to Personal Pro‐ file  35 
Programmable memory but‐ tons, iDrive  24 
Protective function, glass sunroof  47 
Protective function, win‐ dows  46 
Push-and-turn switch, refer to Controller  18, 19  
R Radiator fluid  190 
Radio-operated key, refer to Remote control  34 
Radio ready state  63 
Radio, see user's manual for Navigation, Entertainment
and Communication 
Rain sensor  69 
Rear lights  198 
Rear socket  142 
Rearview camera  123 
Rearview mirror  55 
Rear window de‐ froster  131, 134  
Recirculated-air filter  135 
Recirculated-air mode  131, 134  
Recommended fuel grade  170 
Recommended tire brands  179 
Refueling  168 
Remaining range  81 
Remote control/key  34 
Remote control, malfunc‐ tion  38 
Remote control, univer‐ sal  137  
Replacement fuse  201 
Replacing parts  193 Replacing wheels/tires  178 
Reporting safety defects  9 
RES button, see Cruise con‐ trol  118  
Reserve warning, refer to Range  81 
Reset, Tire Pressure Monitor TPM  99 
Retaining straps, securing cargo  156 
Retreaded tires  179 
Roadside parking lights  91 
RON recommended fuel grade  170 
Roofliner  17 
Roof load capacity  214 
Roof-mounted luggage rack  157 
Rope for tow-starting/ towing  206 
RSC Run Flat System Com‐ ponent, refer to Run-flat
tires  180 
Rubber components, care  210 
Run-flat tires  180 
S Safe braking  153 
Safety  7 
Safety belt reminder for driv‐ er's seat and front passen‐
ger seat  53 
Safety belts  52 
Safety belts, care  211 
Safety systems, airbags  95 
Saving fuel  158 
Screen, refer to Control Dis‐ play  18 
Screwdriver, see Onboard ve‐ hicle tool kit  193 
Screw thread, see screw thread for tow fitting, screw
thread for tow fitting  207 
Sealant  180 Seat and mirror memory  55 
Seat belts, refer to Safety belts  52 
Seat heating, front  51 
Seating position for chil‐ dren  59 
Seats  48 
Selection list in instrument cluster  84 
Selector lever, Steptronic transmission  72 
Sensors, care  211 
Service and warranty  8 
Service requirements, Condi‐ tion Based Service
CBS  191 
Service requirements, dis‐ play  82 
Services, ConnectedDrive 
Servotronic  114 
SET button, see Cruise con‐ trol  118  
Settings, locking/unlock‐ ing  43 
Settings on Control Dis‐ play  87 
Settings, storing for seat, mir‐ ror  55 
Shift paddles on the steering wheel  73 
Side airbags  95 
Signaling, horn  14 
Signals when unlocking  43 
Sitting safely  48 
Size  214 
Slide/tilt glass roof  46 
Snow chains  183 
Socket  141 
Socket, OBD Onboard Diag‐ nostics  192 
SOS button  202 
Spare fuse  201 
Specified engine oil types  189 
Speed, average  86 Seite 224ReferenceEverything from A to Z224
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