With high-speed tuning featureTire sizePressure specifications
in bar/PSISpecifications in
bar/PSI with cold
tires245/45 R 18 100 V
M+S XL A/S RSC
245/45 R 18 100 V
M+S XL RSC2.8 / 413.2 / 46245/40 R 19 98 V
M+S XL A/S RSC3.0 / 443.4 / 49Front: 245/45 R 18
96 Y RSC
Rear: 275/40 R 18
99 Y RSC2.4 / 35
--
2.6 / 38Front: 245/40 R 19
94 Y RSC
Rear: 275/35 R 19
96 Y RSC2.6 / 38
--
2.8 / 41Front: 245/35 R 20
95 Y XL RSC
Rear: 275/30 R 20
97 Y XL RSC3.0 / 44
--
3.2 / 46
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 4314
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
4314: tire age
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
Tire age DOT … 4314: the tire was manufactured in the
43th week of 2014.
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 C
All passenger car tires must conform to Fed‐
eral Safety Requirements in addition to these
grades.Seite 202MobilityWheels and tires202
Online Edition for Part no. 01 40 2 956 336 - X/14
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 on the front and
rear axles, i.e. when using different types of
tires.Seite 205Wheels and tiresMobility205
Online Edition for Part no. 01 40 2 956 336 - X/14
StorageStore 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 consist of tires that are self-sup‐
porting, to a limited degree, and possibly spe‐
cial rims.
The support of the sidewall allows the tire to
remain drivable to a restricted degree in the
event of a tire inflation pressure loss.
Follow the instructions for continued driving
with a flat tire.
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:▷225/55 R 17.▷245/45 R 18.▷245/40 R 19.
Follow the snow chain manufacturer's instruc‐
tions.
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 needed.
Maximum speed with snow chains Do not exceed a speed of 30 mph/50 km/hwhen using snow chains.
Snow chain detection
The concept When using snow chains, settings should bemade via the iDrive for the snow chains being
applied.
The snow chain detection system supports
you by automatically showing the detected
state on the Control Display.
When snow chains are in use, the rear axle
steering of the Integral Active Steering is deac‐
tivated automatically.
At speeds above the maximum permitted
speed with snow chains of 30 mph/50 km/h,
the rear axle steering is activated again auto‐
matically.
Seite 206MobilityWheels and tires206
Online Edition for Part no. 01 40 2 956 336 - X/14
RSC Run Flat System Com‐ponent, refer to Run-flat
tires 206
Rubber components, care 231
Run-flat tires 206
S Safe braking 179
Safety 7
Safety belt reminder for driv‐ er's seat and front passen‐
ger seat 59
Safety belts 58
Safety belts, care 231
Safety Package, refer to Ac‐ tive Protection 131
Safety systems, airbags 106
Saving fuel 183
Screen, refer to Control Dis‐ play 18
Screwdriver, see Onboard ve‐ hicle tool kit 217
Screw thread, see screw thread for tow fitting, screw
thread for tow fitting 227
Seat belts, refer to Safety belts 58
Seat heating, front 57
Seating position for chil‐ dren 65
Seat, mirror, and steering wheel memory 61
Seats 55
Seat ventilation, front 57
Selection list in instrument cluster 94
Selector lever, Steptronic transmission 78
Sensors, care 232
Service and warranty 8
Service requirements, Condi‐ tion Based Service
CBS 215 Service requirements, dis‐
play 92
Service, Roadside Assis‐ tance 224
Services, ConnectedDrive
SET button, see Active Cruise Control, ACC 141
SET button, see Cruise con‐ trol 148
Settings, locking/unlock‐ ing 43
Settings on Control Dis‐ play 97
Settings, storing for seat, mir‐ rors, steering wheel 61
Shift Lights 85
Shift paddles on steering wheel 79
Shoulder support 57
Side airbags 106
Side View 155
Signaling, horn 14
Signals when unlocking 43
Sitting safely 55
Size 236
Ski bag 172
Smallest turning radius 236
Smoker's package 170
Snow chains 206
Socket 171
Socket, OBD Onboard Diag‐ nostics 215
SOS button 223
Spare fuse 221
Speaker lighting 105
Specified engine oil types 212
Speed, average 95
Speed limit detection, com‐ puter 96
Speed limiter, display 93
Speed Limit Information 93
Speed warning 96
Split screen 23
SPORT+ - program, Dynamic Driving Control 139 Sport displays, torque dis‐
play, performance dis‐
play 96
SPORT program, driving dy‐ namics 139
Sport program, transmis‐ sion 78
Stability control systems 133
Start/stop, automatic func‐ tion 70
Start/Stop button 68
Start function during malfunc‐ tion 35
Starting the engine 69
Status control display, tires 110
Status information, iDrive 22
Status of Owner's Manual 6
Steering, Integral Active Steering 137
Steering wheel, adjusting 63
Steering wheel heating 64
Steering wheel memory 61
Steptronic Sport transmis‐ sion 79
Steptronic transmission 77
Stopping the engine 69
Storage compartments 173
Storage compartments, loca‐ tions 173
Storage, tires 206
Storing the vehicle 232
Summer tires, tread 203
Sun visor 170
Supplementary text mes‐ sage 89
Surround View 152
Suspension settings 137
Switch for Dynamic Driving Control 137
Switch-on times, parked-car heating 166
Switch-on times, parked-car ventilation 166
Switch, refer to Cockpit 14
Symbols 6 Seite 247Everything from A to ZReference247
Online Edition for Part no. 01 40 2 956 336 - X/14