
If an identification is not possible, please
contact the service center.2.Fix the flat tire.
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 in the
following situations▷The system has detected a wheel change,
but no reset was carried out.▷Inflation was not carried out according to
specifications.▷The tire pressure has fallen below the level
of the last confirmation.
In this case:
▷Check the tire pressure and correct as
needed.▷Carry out a reset of the system after a tire
change.
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
Seite 100ControlsSafety100
Online Edition for Part no. 01 40 2 925 793 - II/14 

temperature falls again. This behavior may
cause a warning to be issued if 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 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.Seite 101SafetyControls101
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Wheels and tiresVehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equip‐
ment is also described that is not available in a
vehicle, e. g., because of the selected optional
equipment or country variant. This also applies
for safety-related functions and systems.
Tire inflation pressure Safety information
The tire characteristics and tire inflation pres‐
sure influence the following:▷The service life of the tires.▷Road safety.▷Driving comfort.
Checking the pressure
Tires have a natural, consistent loss of pres‐
sure.
Check the tire inflation pressure regularly
Regularly check the tire inflation pres‐
sure, and correct it as needed: at least twice a
month and before a long trip. If you fail to ob‐
serve this precaution, you may be driving on
tires with incorrect tire pressures, a condition
that may not only compromise your vehicle's
driving stability, but also lead to tire damage
and the risk of an accident.◀
Tires heat up during driving, and the tire infla‐
tion pressure increases along with the temper‐
ature of the tire. The tire inflation pressure
specifications relate to cold tires or tires with
the ambient temperature.
Only check the tire inflation pressure when the
tires are cold. This means after driving no more
than 1.25 miles/2 km or when the vehicle has
been parked for at least 2 hours.
The displays of inflation devices may under-
read by up to 0.1bar, 2 psi.
For Flat Tire Monitor: after correcting the tire
inflation pressure, reinitialize the Flat Tire
Monitor.
For Tire Pressure Monitor: after correcting the
tire inflation pressure, reset the Tire Pressure
Monitor.
Pressure specifications The tire inflation pressure table, refer to
page  192, contains all pressure specifications
for the specified tire sizes at the ambient tem‐
perature. Pressure specifications apply to ap‐
proved tire sizes and recommended tire
brands. This information can be obtained from
your service center.
To identify the correct tire inflation pressure,
please note the following:▷Tire sizes of your vehicle.▷Maximum permitted driving speed.
Tire inflation pressures up to
100 mph/160 km/h
For speeds of up to 100 mph/160 km/h and for
optimum driving comfort, note the pressure
values in the tire inflation pressure table, refer
to page  192, and adjust as necessary.
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Passenger side mirror, tiltingdownward  56 
Pathway lines, rearview cam‐ era  132  
PDC Park Distance Con‐ trol  129  
Pedestrian warning with city braking function  109 
Personal Profile  33 
Personal Profile, exporting profiles  34 
Personal Profile, importing profiles  35 
Pinch protection system, glass sunroof  46 
Pinch protection system, win‐ dows  44 
Plastic, care  227 
Power failure  216 
Power windows  44 
Pressure, tire air pres‐ sure  191 
Pressure warning FTM, tires  101 
Profile, refer to Personal Pro‐ file  33 
Programmable memory but‐ tons, iDrive  22 
Protective function, glass sunroof  46 
Protective function, win‐ dows  44 
Push-and-turn switch, refer to Controller  16, 17  
R Radiator fluid  204 
Radio-operated key, refer to Remote control  32 
Radio ready state  63 
Radio, see user's manual for Navigation, Entertainment
and Communication 
Rain sensor  68 
Rear socket  154 Rear turn signal, bulb replace‐
ment  213 
Rearview camera  131 
Rearview mirror  55 
Rear window  39 
Rear window de‐ froster  143, 147  
Recirculated-air filter  147 
Recirculated-air mode  143, 146  
Recommended fuel grade  186 
Recommended tire brands  196 
Refueling  184 
Remaining range  80 
Remote control/key  32 
Remote control, malfunc‐ tion  36 
Remote control, univer‐ sal  149  
Replacement fuse  217 
Replacing parts  207 
Replacing wheels/tires  196 
Reporting safety defects  9 
RES button  123 
Reserve warning, refer to Range  80 
Reset, Tire Pressure Monitor TPM  99 
Retaining straps, securing cargo  172 
Retreaded tires  196 
Roadside parking lamps  91 
Roller sunblinds  45 
RON recommended fuel grade  186 
Roof load capacity  232 
Roof-mounted luggage rack  172 
Rope for tow-starting/ towing  223 
RSC Run Flat System Com‐ ponent, refer to Run-flat
tires  197 Rubber components,
care  227 
Run-flat tires  197 
S Safe braking  169 
Safety  7 
Safety belt reminder for driv‐ er's seat and front passen‐
ger seat  52 
Safety belts  51 
Safety belts, care  227 
Safety switch, windows  45 
Safety systems, airbags  95 
Saving fuel  174 
Screen, refer to Control Dis‐ play  16 
Screwdriver, see Onboard ve‐ hicle tool kit  207 
Screw thread for tow fit‐ ting  224 
Seat and mirror memory  54 
Seat belts, refer to Safety belts  51 
Seat heating, front  51 
Seat heating, rear  51 
Seating position for chil‐ dren  58 
Seats  48 
Selection list in instrument cluster  84 
Selector lever, automatic transmission  71 
Sensors, care  228 
Service and warranty  8 
Service requirements, Condi‐ tion Based Service
CBS  205 
Service requirements, dis‐ play  81 
Service, Roadside Assis‐ tance  220 
Services, ConnectedDrive 
Settings, locking/unlock‐ ing  41 Seite 240ReferenceEverything from A to Z240
Online Edition for Part no. 01 40 2 925 793 - II/14