
If an identification is not possible, please
contact the service center.2.Rectify the flat tire.
Use of tire sealant, e.g., the Mobility Sys‐
tem, may damage the TPM wheel elec‐
tronics. In this case, have the electronics
checked at the next opportunity and have
them replaced if necessary.
Run-flat tires
Maximum speed
You can continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
Continued driving with a flat tire
If continuing to drive with a damaged tire:
1.Avoid sudden braking and steering maneu‐
vers.2.Do not exceed a speed of 50 mph/80 km/h.3.Check the air pressure in all four tires at
the next opportunity.
If the tire inflation pressure in all four tires
is correct, it is possible that a reset was not
carried out for the Tire Pressure Monitor. In
that case, carry out a reset.
Possible driving distance with complete loss of
tire inflation pressure:
The possible driving distance after a loss of tire
inflation pressure depends on the cargo load
and the driving style and conditions.
For a vehicle containing an average load, the
possible driving distance is approx.
50 miles/80 km.
When the vehicle is driven with a damaged tire,
its handling characteristics change, e.g., re‐
duced lane stability during braking, a longer
braking distance, and altered self-steering
properties. Adjust your driving style accord‐
ingly. Avoid abrupt steering maneuvers or driv‐
ing over obstacles, e.g., curbs, potholes, etc.
Because the possible driving distance de‐
pends on how the vehicle is used during the
trip, the actual distance may be smaller or
greater depending on the driving speed, road
conditions, external temperature, cargo load,
etc.
Continued driving with a flat tire
Drive moderately and do not exceed a
speed of 50 mph/80 km/h.
A loss of tire inflation pressure results in a
change in the handling characteristics, e.g., re‐
duced lane stability during braking, a longer
braking distance and altered self-steering
properties.◀
Final tire failure
Vibrations or loud noises while driving
can indicate the final failure of the tire. Reduce
speed and stop; otherwise, pieces of the tire
could come loose and cause an accident. Do
not continue driving, and contact your service
center.◀
Required inflation pressure check
message
A Check Control message is displayed.
Check the tire inflation pressure and carry out
a reset of the system.
In some cases, a wheel was changed without
having carried out a reset.
System limits
The system does not function properly if a re‐
set has not been carried out, e.g., a flat tire is
reported even though the tire inflation pres‐
sures are correct.
The tire pressure depends on the temperature
of the tire. If the tire temperature rises, e.g.,
due to driving or because of the heat of the
Sun, the tire inflation pressure increases also.
The tire pressure is reduced when the tire
temperature falls again. This behavior may
cause a warning to be issued if temperatures
fall very sharply.Seite 101SafetyControls101
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MalfunctionThe yellow warning lamp flashes andthen lights up continuously. A Check
Control message is displayed. No flat
tire or loss of tire pressure can be detected.
Display in the following situations:▷A wheel without TPM electronics is fitted:
have the service center check it if neces‐
sary.▷Malfunction: have the system checked by
your service center.▷TPM was unable to complete the reset.
Reset the system again.▷Disturbance by systems or devices with
the same radio frequency: after leaving the
area of the disturbance, the system auto‐
matically 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.
FTM Flat Tire Monitor The conceptThe system detects a pressure loss on the ba‐sis of speed differences between the individual
wheels while driving.
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.
The system does not measure the actual infla‐
tion pressure in the tires.
Functional requirements
The system must have been initialized when
the tire inflation pressure was correct; other‐
wise, reliable signaling of a flat tire is not en‐Seite 102ControlsSafety102
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Park Distance ControlPDC  130 
Parked-car ventilation  149 
Parked vehicle, condensa‐ tion  168 
Parking aid, refer to PDC  130 
Parking assistant  138 
Parking brake  67 
Parking lamps  91 
Particulate filter  167 
Passenger side mirror, tilting downward  57 
Pathway lines, rearview cam‐ era  134  
PDC Park Distance Con‐ trol  130  
Pedestrian warning with city braking function  110 
Personal Profile  35 
Pinch protection system, glass sunroof  48 
Pinch protection system, win‐ dows  46 
Plastic, care  225 
Power failure  215 
Power sunroof, glass  47 
Power windows  45 
Pressure, tire air pres‐ sure  187 
Pressure warning FTM, tires  102 
Profile, refer to Personal Pro‐ file  35 
Programmable memory but‐ tons, iDrive  24 
Protective function, glass sunroof  48 
Protective function, win‐ dows  46 
Push-and-turn switch, refer to Controller  18, 19  
R Radiator fluid  203 Radio-operated key, refer to
Remote control  34 
Radio ready state  64 
Radio, see user's manual for Navigation, Entertainment
and Communication 
Rain sensor  69 
Rear lamps  212 
Rear socket  156 
Rearview camera  133 
Rearview mirror  56 
Rear window de‐ froster  145, 148  
Recirculated-air filter  149 
Recirculated-air mode  145, 148  
Recommended tire brands  196 
Refueling  180 
Remaining range  81 
Remote control/key  34 
Remote control, malfunc‐ tion  39 
Remote control, univer‐ sal  151  
Replacement fuse  215 
Replacing parts  206 
Replacing wheels/tires  195 
Reporting safety defects  9 
RES button  124 
Reserve warning, refer to Range  81 
Reset, Tire Pressure Monitor TPM  100 
Retaining straps, securing cargo  170 
Retreaded tires  196 
Roadside parking lamps  92 
Roller sunblinds  47 
RON gasoline quality  182 
Roof load capacity  230 
Roof-mounted luggage rack  171 
Rope for tow-starting/ towing  221 RSC Run Flat System Com‐
ponent, refer to Run-flat
tires  197 
Rubber components, care  225 
Run-flat tires  197 
S Safe braking  167 
Safety  7 
Safety belt reminder for driv‐ er's seat and front passen‐
ger seat  53 
Safety belts  52 
Safety belts, care  225 
Safety switch, windows  46 
Safety systems, airbags  96 
Saving fuel  172 
Screen, refer to Control Dis‐ play  18 
Screwdriver  206 
Screw thread for tow fit‐ ting  222 
Seat and mirror memory  55 
Seat belts, refer to Safety belts  52 
Seat heating, front  52 
Seat heating, rear  52 
Seating position for chil‐ dren  59 
Seats  49 
Selection list in instrument cluster  85 
Selector lever, automatic transmission  72 
Sensors, care  226 
Service and warranty  8 
Service requirements, Condi‐ tion Based Service
CBS  204 
Service requirements, dis‐ play  82 
Service, Roadside Assis‐ tance  218 
Services, ConnectedDrive Seite 240ReferenceEverything from A to Z240
Online Edition for Part no. 01 40 2 926 810 - X/13