System limits
The system does not function properly if a re‐
set has not been carried out, e.g., a flat tire is
reported though tire inflation pressures are
correct.
The tire inflation pressure depends on the
tire's temperature. Driving or exposure to the
sun will increase the tire's temperature, thus
increasing the tire inflation pressure. The tire
inflation pressure is reduced when the tire
temperature falls again. These circumstances
may cause a warning when temperatures fall
very sharply.
Malfunction The yellow warning lamp flashes and
then lights up continuously. A Check
Control message is displayed. No flat
tire or loss of tire inflation pressure can be de‐
tected.
Display in the following situations:▷A wheel without TPM electronics, such as
an emergency wheel, is mounted: have the
service center check it if needed.▷Malfunction: have the system checked by
your service center.▷TPM was unable to complete the reset.
Reset the system again.▷Interference through systems or devices
with the same radio frequency: after leav‐
ing the area of the interference, the system
automatically becomes active again.
Declaration according to NHTSA/
FMVSS 138 Tire Pressure Monitoring
System
Each tire, including the spare (if provided)
should be checked monthly when cold and in‐
flated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your
vehicle has tires of a different size than the size
indicated on the vehicle placard or tire inflation
pressure label, you should determine the
proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pres‐
sure telltale when one or more of your tires is
significantly under-inflated. Accordingly, when
the low tire pressure telltale illuminates, you
should stop and check your tires as soon as
possible, and inflate them to the proper pres‐
sure. Driving on a significantly under-inflated
tire causes the tire to overheat and can lead to
tire failure. Under-inflation also reduces fuel ef‐
ficiency and tire tread life, and may affect the
vehicle's handling and stopping ability. Please
note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver's
responsibility to maintain correct tire pressure,
even if under-inflation has not reached the
level to trigger illumination of the TPMS low
tire pressure telltale. Your vehicle has also
been equipped with a TPMS malfunction indi‐
cator to indicate when the system is not oper‐
ating properly. The TPMS malfunction indica‐
tor is combined with the low tire pressure
telltale. When the system detects a malfunc‐
tion, the telltale will flash for approximately one
minute and then remain continuously illumi‐
nated. This sequence will continue upon sub‐
sequent vehicle start-ups as long as the mal‐
function exists. When the malfunction indicator
is illuminated, the system may not be able to
detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of
reasons, including the installation of replace‐
ment or alternate tires or wheels on the vehicle
that prevent the TPMS from functioning prop‐
erly. Always check the TPMS malfunction tell‐
tale after replacing one or more tires or wheels
on your vehicle to ensure that the replacement
or alternate tires and wheels allow the TPMS
to continue to function properly.Seite 110ControlsSafety110
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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 on the front and
rear axles, i.e. when using different types of
tires.Seite 210MobilityWheels and tires210
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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:▷255/50 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.
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SSafe braking 187
Safety 7
Safety belt reminder for driv‐ er's seat and front passen‐
ger seat 56
Safety belts 55
Safety belts, care 237
Safety Package, refer to Ac‐ tive Protection 129
Safety reel, windows 48
Safety systems, airbags 104
Saving fuel 193
Screen, refer to Control Dis‐ play 18
Screwdriver, see Onboard ve‐ hicle tool kit 221
Screw thread, see screw thread for tow fitting, screw
thread for tow fitting 233
Seat belts, refer to Safety belts 55
Seat heating, front 54
Seat heating, rear 55
Seating position for chil‐ dren 62
Seat, mirror, and steering wheel memory 58
Seats 51
Seats, front 51
Seats, rear 55
Seat ventilation, front 54
Selection list in instrument cluster 93
Selector lever, Steptronic transmission 77
Self-leveling suspension, air suspension 136
Self-leveling suspension, malfunction 137
Sensors, care 237
Service and warranty 8
Service requirements, Condi‐ tion Based Service
CBS 219 Service requirements, dis‐
play 91
Service, Roadside Assis‐ tance 230
Services, ConnectedDrive
SET button, see Active Cruise Control, ACC 140
SET button, see Cruise con‐ trol 147
Settings, locking/unlock‐ ing 44
Settings on Control Dis‐ play 96
Settings, storing for seat, mir‐ rors, steering wheel 58
Shift Lights 84
Shift paddles on steering wheel 79
Shoulder support 54
Side airbags 104
Side View 156
Signaling, horn 14
Signals when unlocking 44
Sitting safely 51
Size 240
Ski and snowboard bag 177
Slide/tilt glass roof 48
Smoker's package 171
Snow chains 211
Socket, OBD Onboard Diag‐ nostics 219
Sockets, see Connecting electrical devices 173
SOS button 229
Spare fuse 227
Spare tire 225
Specified engine oil types 216
Speed, average 94
Speed limit detection, com‐ puter 95
Speed limiter, display 92
Speed Limit Information 92
Speed warning 95
Split screen 23 SPORT+ - program, Dynamic
Driving Control 138
Sport displays, torque dis‐ play, performance dis‐
play 95
SPORT program, driving dy‐ namics 138
Sport program, transmis‐ sion 78
Stability control systems 132
Start/stop, automatic func‐ tion 69
Start/Stop button 67
Start function during malfunc‐ tion 35
Starting the engine 68
Status control display, tires 108
Status information, iDrive 23
Status of Owner's Manual 6
Steering, Active Steering 136
Steering wheel, adjusting 60
Steering wheel heating 61
Steering wheel memory 58
Steptronic Sport transmis‐ sion 79
Steptronic transmission 77
Stopping the engine 68
Storage compartment on the center console 179
Storage compartments 178
Storage compartments, loca‐ tions 178
Storage, tires 211
Storing the vehicle 237
Summer tires, tread 208
Sun visor 171
Supplementary text mes‐ sage 88
Surround View 151
Suspension settings 137
Switch for Dynamic Driving Control 137
Switch, refer to Cockpit 14
Symbols 6
Symbols in the status field 23 Seite 251Everything from A to ZReference251
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