In the event of a pressure loss, the diameter and
therefore the rotational speed of the corre‐
sponding wheel change. This is detected and
reported as a flat tire.
Functional requirements
The system must have been initialized when the
tire inflation pressure was correct; otherwise,
reliable signaling of a flat tire is not ensured. In‐
itialize the system after each correction of the
tire inflation pressure and after every tire or
wheel change.
System limits Sudden tire damage
Sudden serious tire damage caused by
external influences cannot be indicated in ad‐
vance.◀
A natural, even pressure loss in all four tires can‐
not be detected. Therefore, check the tire infla‐
tion pressure regularly.
The system could be delayed or malfunction in
the following situations:▷When the system has not been initialized.▷When driving on a snowy or slippery road
surface.▷Sporty driving style: slip in the drive wheels,
high lateral acceleration.▷When driving with snow chains.
Status display
The current status of the Flat Tire Monitor can
be displayed on the Control Display, e.g.,
whether or not the FTM is active.
1."Vehicle Info"2."Vehicle status"3. "Flat Tire Monitor"
The status is displayed.
Initialization
The initialization process adopts the set inflation
tire pressures as reference values for the detec‐
tion of a flat tire. Initialization is started by con‐
firming the inflation pressures.
Do not initialize the system when driving with
snow chains.1."Vehicle Info"2."Vehicle status"3. "Reset"4.Start the engine - do not drive away.5.Start the initialization with "Reset".6.Drive away.
The initialization is completed while driving,
which can be interrupted at any time.
The initialization automatically continues when
driving resumes.
Indication of a flat tire The yellow warning lamp lights up. A
Check Control message is displayed.
There is a flat tire or a major loss in tire
inflation pressure.
1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.2.Check whether the vehicle is fitted with reg‐
ular tires or run-flat tires.
Run-flat tires, refer to page 162, are labeled
with a circular symbol containing the letters
RSC marked on the tire sidewall.
Do not continue driving without run-flat
tires
Do not continue driving if the vehicle is not
equipped with run-flat tires; continued driving
may result in serious accidents.◀
When a flat tire is indicated, DSC Dynamic Sta‐
bility Control is switched on if necessary.
Actions in the event of a flat tire
Normal tires
1.Identify the damaged tire.Seite 98ControlsSafety98
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Indicator/warning lamps
When DSC is deactivated, DSC OFF is dis‐
played in the instrument cluster.
The indicator lamp lights up: DSC is de‐
activated.
DTC Dynamic Traction
Control
The concept
The DTC system is a version of the DSC in which
forward momentum is optimized.
The system ensures maximum forward momen‐
tum on special road conditions, e.g., unplowed
snowy roads, but driving stability is limited.
It is therefore necessary to drive with appropri‐
ate caution.
You may find it useful to briefly activate DTC un‐
der the following special circumstances:▷When driving in slush or on uncleared,
snow-covered roads.▷When rocking the vehicle or driving off in
deep snow or on loose surfaces.▷When driving with snow chains.
Deactivating/activating DTC Dynamic
Traction Control
Activating the Dynamic Traction Control DTC
provides maximum traction on loose ground.
Driving stability is limited during acceleration
and when driving in bends.
Activating DTC Press the button.
TRACTION is displayed in the instru‐
ment cluster and the indicator lamp for DSC
OFF lights up.
Deactivating DTC
Press the button again.
TRACTION and the DSC OFF indicator
lamp go out.
Performance Control
Performance Control enhances the agility of
your vehicle.
To enhance performance during sporty driving,
the rear wheel on the inside of the curve is
braked while the resulting braking effect is
largely compensated by engine intervention.
xDrive
xDrive is the all-wheel-drive system of your ve‐
hicle. Concerted action by the xDrive and DSC
further optimize traction and driving dynamics.
The xDrive all-wheel-drive system variably dis‐
tributes the drive forces to the front and rear
axles as demanded by the driving situation and
road surface.
HDC Hill Descent Control
The concept
HDC is a downhill driving assistant that auto‐
matically controls vehicle speed on steep down‐
hill gradients. Without applying the brakes, the
vehicle moves at slightly more than walking
speed.
Hill Descent Control can be activated at speeds
below approx. 22 mph/35 km/h. When driving
downhill, the vehicle reduces its speed to ap‐
prox. walking speed and then keeps its speed
constant.
As long as there is active braking, the system is
on standby. The system does not brake the ve‐
hicle during this time.Seite 103Driving stability control systemsControls103
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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 are composed of special rims and
tires that are self-supporting, to a limited de‐
gree.
The support of the sidewall allows the tire to re‐
main drivable to a restricted degree in the event
of a pressure loss.
Continued driving with a damaged tire, refer to
page 99.
Continued driving with a damaged tire, refer to
page 96.
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 your vehicle,
classified as road-safe and recommended.
Consult your service center for more informa‐
tion.
Use
Use only in pairs on the rear wheels, equipped
with the tires of the following size:▷205/65 R 17.▷225/60 R 17.▷245/50 R 18.▷245/45 R 19.
No snow chains on size 245/55 R 17 tires
Do not mount snow chains on size 245/55
R 17 tires; otherwise, the vehicle may become
damaged.◀
Follow the chain manufacturer's instructions.
Make sure that the snow chains are always suf‐
ficiently tight. Retighten as needed according 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 necessary.
Maximum speed with snow chains
Do not exceed a speed of 30 mph/50 km/h when
using snow chains.
Seite 162MobilityWheels and tires162
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RSC Run Flat System Compo‐nent, refer to Run-flat
tires 162
Rubber components, care 185
Run-flat tires 162
S
Safe braking 141
Safety 7
Safety belt reminder for driv‐ er's seat and front passenger
seat 50
Safety belts 49
Safety belts, care 185
Safety switch, windows 43
Safety systems, airbags 91
Saving fuel 0
Screen, refer to Control Dis‐ play 16
Screwdriver 171
Screw thread for tow fit‐ ting 182
Seat and mirror memory 52
Seat belts, refer to Safety belts 49
Seat heating, front 49
Seat heating, rear 49
Seating position for chil‐ dren 55
Seats 46
Selection list in instrument cluster 81
Selector lever, automatic transmission 69
Sensors, care 186
Service and warranty 7
Service requirements, Condi‐ tion Based Service CBS 168
Service requirements, dis‐ play 78
Service, Roadside Assis‐ tance 179
Settings on Control Dis‐ play 83 Settings, storing for seat, mir‐
ror 52
Shifting, automatic transmis‐ sion 68
Shift paddles on steering wheel 70
Short commands 193
Side airbags 91
Signaling, horn 12
Signals when unlocking 35
Sitting safely 46
Size 190
Slide/tilt glass roof 43
Smallest turning circle 191
Snow chains 162
Socket 129
Socket, OBD Onboard Diag‐ nostics 169
SOS button 178
Spare fuse 177
Specified engine oil types 166
Speed, average 82
Speed limit detection, on‐ board computer 82
Speed limiter, display 79
Speed Limit Information 79
Speed limit in the com‐ puter 82
Split screen 21
SPORT+ - program, Dynamic Driving Control 105
Sport automatic transmis‐ sion 70
SPORT program, Dynamic Driving Control 105
Sport program, transmis‐ sion 70
Sport steering, variable 105
Stability control systems 102
Start/stop, automatic func‐ tion 61
Start/Stop button 59
Start function during malfunc‐ tion 31
Starting the engine 60 Status display, tires 94
Status information, iDrive 20
Status of Owner's Manual 6
Steering wheel, adjusting 54
Steering wheel heating 54
Steptronic, automatic trans‐ mission 68
Stopping the engine 60
Storage compartments 134
Storage compartments, loca‐ tions 134
Storage, tires 161
Storing the vehicle 186
Summer tires, tread 159
Supplementary text mes‐ sages 75
Switch for Dynamic Driv‐ ing 105
Switch-on times, parked-car ventilation 126
Switch, refer to Cockpit 12
Symbols 6
T
Tachometer 76
Tailgate 37
Tailgate, automatic 38
Tailgate via remote control 35
Tail lamps 175
Technical changes, refer to Safety 7
Technical data 190
Telephone, see user's manual for Navigation, Entertain‐
ment and Communication
Temperature, automatic cli‐ mate control 121, 123
Temperature display, external temperature 77
Temperature, engine oil 76
Terminal, jump-starting 180
Text messages, supplemen‐ tary 75
Theft alarm system, refer to Alarm system 40 Seite 208ReferenceEverything from A to Z208
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