
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  181, 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 lampsThe indicator lamp flashes: DSC con‐
trols the drive forces and brake forces.
The indicator lamp lights up: DSC has
failed.
Deactivating DSC: DSC OFF
When DSC is deactivated, driving stability is re‐
duced during acceleration and when driving in
bends.
Stabilizing interventions by the Integral Active
Steering system are only performed by the rear
axle steering.
To increase vehicle stability, activate DSC again
as soon as possible.
Deactivating DSC Press and hold the button, but not lon‐
ger than approx. 10 seconds, until the
indicator lamp for DSC OFF lights up in the in‐
strument cluster and DSC OFF is displayed.
The DSC system is switched off.
Activating DSC Press the button.
DSC OFF and the DSC OFF indicator
lamp go out.
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.
Indicator/warning lamps
When DTC is activated, TRACTION is displayed
in the tachometer.
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At speeds up to approx. 37 mph/60 km/h, e.g.,
in curves, the steering angle is increased, i.e.,
steering becomes more direct.
The rear axle steering acts to increase maneu‐
verability by turning the rear wheels slightly in a
direction opposite to the front wheels.
At higher speeds, the steering angle is increas‐
ingly reduced.
The rear wheels are turned to the same angle as
the front wheels.
In critical situations, Integral Active Steering can
specifically steer the front and rear wheels to
stabilize the vehicle before the driver intervenes,
e.g., when braking where road conditions differ
on the left and right sides of the vehicle.
Initializing
In rare cases, it may become necessary to initi‐
alize the Integral Active Steering.
The warning lamp lights up. A Check
Control message is displayed.1.With the engine running, turn the steering
wheel all the way to the left and right several
times in a uniform manner until the warning
lamp disappears.2.Have the system checked if the warning
lamp does not go out after moving the steer‐
ing wheel approx. 6 times or if the steering
wheel is at an angle.
Using snow chains
Ensure that the rear axle steering is deactivated
when using snow chains, refer to page  182.
Programs
The system offers two different programs.
The programs can be selected via the Driving
Experience Switch, refer to page  114.
SPORT
Consistently sporty tuning of the Integral Active
Steering for greater driving agility.
COMFORT
Balanced tuning of the Integral Active Steering
for optimal traveling comfort.
Malfunction
In the event of a malfunction, the steering wheel
must be turned further, while the vehicle re‐
sponds more sensitively to steering wheel
movements in the higher speed range.
The stability-enhancing intervention may be de‐
activated.
Proceed cautiously and drive defensively.
Have the system checked.
Driving Experience Switch
The concept
The Driving Experience Switch can be used to
adjust the driving dynamics of the vehicle. For
this purpose various programs are available for
selection that are activated via the two buttons
of the Driving Experience Switch and the DSC
OFF-button.
Operating the programsPress the buttonProgramDSC OFF
TRACTIONSPORT+
SPORT
COMFORT
COMFORT+
ECO PRO
Automatic program change
The system automatically switches to COM‐
FORT in the following situations:
▷Failure of Integral Active Steering.▷Failure of Dynamic Damping Control.Seite 114ControlsDriving stability control systems114
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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:▷225/55 R 17.▷245/45 R 18.▷245/40 R 19
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.
Snow chain detection
The concept
When using snow chains, you should set
whether you are driving with or without snow
chains via the iDrive.
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 steer‐
ing of the Integral Active Steering is deactivated
automatically.
At speeds above the maximum permitted speed
with snow chains of 30 mph/50 km/h, the rear
axle steering is activated again automatically.
Activating the status1."Settings"2."Tire chains"3."Tire chains installed"
Automatic detection
If functioning properly:
▷Snow chains are mounted. The setting is not
activated  
  .
After you drive a short distance, a Check
Control message is shown and the state is
activated automatically.
Confirm the automatic activation.
▷Snow chains are not mounted. The setting
is activated  
  .
At speeds above 30 mph/50 km/h, a Check
Control message is displayed. Deactivate
the status manually.
If not functioning properly:
▷Snow chains are mounted. The setting is not
activated  
  .
A Check Control message is not displayed.
The automatic detection system is malfunc‐
tioning. Activate the status manually.
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Activating/deactivating rear axle
steering
If the status indicating that snow chains are in
use is activated, the rear axle steering is deacti‐
vated automatically.
At speeds above 30 mph/50 km/h, the rear axle
steering is activated again, even though snow
chains are in use.Seite 183Wheels and tiresMobility183
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Protective function, glass sun‐roof  44 
Protective function, win‐ dows  42 
Push-and-turn switch, refer to Controller  16 
R
Radiator fluid  188 
Radio-operated key, refer to Remote control  30 
Radio ready state  58 
Radio, see user's manual for Navigation, Entertainment
and Communication 
Rain sensor  66 
Rear axle steering  113 
Rear center armrest  152 
Rear lamps  194 
Rearview mirror  51 
Rear window defroster  142 
Recirculated-air mode  142 
Recommended tire brands  180 
Refueling  170 
Remaining range  78 
Remote control/key  30 
Remote control, malfunc‐ tion  35 
Remote control, universal  145 
Replacement fuse  197 
Replacing parts  192 
Replacing wheels/tires  180 
Reporting safety defects  8 
RES button  120 
Reserve warning, refer to Range  78 
Reset, Tire Pressure Monitor TPM  95 
Residual heat, automatic cli‐ mate control  142 
Retaining straps, securing cargo  162 
Retreaded tires  181 Reversing lamp, bulb replace‐
ment  195 
Roadside parking lamps  87 
Roller sunblinds  42 
Roll stabilization, refer to Adaptive Drive  113 
Roll stabilization, refer to Dy‐ namic Drive  113 
RON gasoline quality  172 
Rope for tow-starting/tow‐ ing  201  
RSC Run Flat System Compo‐ nent, refer to Run-flat
tires  181 
Rubber components, care  205 
Run-flat tires  181 
S
Safe braking  159 
Safety  7 
Safety belt reminder for driv‐ er's seat and front passenger
seat  49 
Safety belts  49 
Safety belts, care  205 
Safety switch, windows  42 
Safety systems, airbags  91 
Saving fuel   0 
Screen, refer to Control Dis‐ play  16 
Screwdriver  192 
Screw thread for tow fit‐ ting  202 
Seat belts, refer to Safety belts  49 
Seat heating, front  47 
Seat heating, rear  48 
Seating position for chil‐ dren  54 
Seat, mirror, and steering wheel memory  51 
Seats  45 
Seat ventilation, front  48 Selection list in instrument
cluster  81 
Selector lever, automatic transmission  68 
Sensors, care  206 
Service and warranty  7 
Service requirements, Condi‐ tion Based Service CBS  189 
Service requirements, dis‐ play  78 
Service, Roadside Assis‐ tance  199 
Settings on Control Dis‐ play  83 
Settings, storing for seat, mir‐ rors, steering wheel  51 
Shifting, automatic transmis‐ sion  67 
Shift paddles on steering wheel  69 
Short commands  213 
Shoulder support  47 
Side airbags  91 
Side View  133 
Signaling, horn  12 
Signals when unlocking  35 
Sitting safely  45 
Size  210 
Ski bag  149 
Smallest turning circle  211 
Smoker's package  147 
Snow chains  182 
Socket  148 
Socket, OBD Onboard Diag‐ nostics  190 
SOS button  198 
Spare fuse  197 
Speaker lighting  90 
Specified engine oil types  187 
Speed, average  82 
Speed limit detection, on‐ board computer  82 
Speed limiter, display  79 
Speed Limit Information  79 Seite 228ReferenceEverything from A to Z228
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