The tire pressure gauge of the Mobility Sys‐
tem, refer to page 175, can be used for this
purpose.
If the tire inflation pressure in all four tires is
correct, the Tire Pressure Monitor may not
have been initialized. In this case, initialize
the system.
If an identification is not possible, please
contact the service center.2.Fix the flat tire using the Mobility System,
refer to page 175.
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 depends
on how the vehicle is used during the trip, the
actual distance may be smaller or greater de‐
pending 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 prop‐
erties. ◀
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 fol‐
lowing 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.Seite 96CONTROLSSafety96
Online Edition for Part no. 01 40 2 927 905 - II/14
System limits
The system does not function properly if a reset
has not been carried out, e.g., a flat tire is re‐
ported even though the tire inflation pressures
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 tem‐
perature 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, such as a
compact wheel, is mounted: have the serv‐
ice center check it if necessary.▷Malfunction: have the system checked by
your service center.▷TPM was unable to complete the reset. Re‐
set 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 sys‐
tem (TPMS) that illuminates a low tire pressure
telltale when one or more of your tires is signifi‐
cantly 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 pressure. Driving
on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Un‐
der-inflation also reduces fuel efficiency and
tire tread life, and may affect the vehicle's han‐
dling and stopping ability. Please note that the
TPMS is not a substitute for proper tire mainte‐
nance, and it is the driver's responsibility to
maintain correct tire pressure, even if under-in‐
flation has not reached the level to trigger illu‐
mination of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The TPMS
malfunction indicator is combined with the low
tire pressure telltale. When the system detects
a malfunction, the telltale will flash for approxi‐
mately one minute and then remain continu‐
ously illuminated. This sequence will continue
upon subsequent vehicle start-ups as long as
the malfunction exists. When the malfunction
indicator is illuminated, the system may not be
able to detect or signal low tire pressure as in‐
tended. TPMS malfunctions may occur for a va‐
riety of reasons, including the installation of re‐
placement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
telltale after replacing one or more tires or
wheels on your vehicle to ensure that the re‐
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
FTM Flat Tire Monitor
The concept The system does not measure the actual infla‐
tion pressure in the tires.Seite 97SafetyCONTROLS97
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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, equipment
is also described that is not available in a vehi‐
cle, 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 pressure.
Check the tire inflation pressure regularly
Regularly check the tire inflation pressure,
and correct it as needed: at least twice a month
and before a long trip. If you fail to observe this
precaution, you may be driving on tires with in‐
correct tire pressures, a condition that may not
only compromise your vehicle's driving stabil‐
ity, 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, 2psi.
For Flat Tire Monitor: after correcting the tire
inflation pressure, reinitialize the Flat Tire Moni‐
tor.
For Tire Pressure Monitor: after correcting the
tire inflation pressure, reset the Tire Pressure
Monitor.▷Reinitialize the Flat Tire Monitor.▷Reinitialize the Tire Pressure Monitor.
Checking the inflation pressure of the
compact wheel
Located behind the bumper on the underside
of the vehicle is an opening for checking the
tire inflation pressure.
Pressure specifications
The tire inflation pressure table, refer to
page 169, 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.Seite 168MOBILITYWheels and tires168
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Remote control, malfunc‐tion 38
Remote control, replacing the battery 34
Remote control, univer‐ sal 133
Replacement fuse 199
Replacing parts 188
Replacing the battery, remote control 34
Replacing wheels/tires 173
Reporting safety defects 9
RES button 112
Reserve warning, refer to Range 75
Reset, Tire Pressure Monitor TPM 95
Retaining straps, securing cargo 152
Retreaded tires 174
Right-hand traffic, lamp set‐ ting 89
Roadside parking lamps 86
RON recommended fuel grade 166
Roof load capacity 214
Roof-mounted luggage rack 152
Rope for tow-starting/ towing 205
RSC Run Flat System Compo‐ nent, refer to Run-flat
tires 175
Rubber components, care 209
Run-flat tires 175
S
Safe braking 149
Safety 7
Safety belt reminder for driv‐ er's seat and front passenger
seat 50
Safety belts 49
Safety belts, care 209 Safety systems, airbags 91
Saving fuel 155
Screen, refer to Control Dis‐ play 18
Screwdriver 188
Screw thread for tow fit‐ ting 205
Sealant 175
Seat belts, refer to Safety belts 49
Seat heating, front 49
Seating position for chil‐ dren 55
Seats 47
Selection list in instrument cluster 78
Selector lever, automatic transmission 68
Sensors, care 210
Service and warranty 8
Service requirements, Condi‐ tion Based Service CBS 186
Service requirements, dis‐ play 76
Service, Roadside Assis‐ tance 202
Settings, locking/unlocking 42
Settings, mirrors 52
Settings on Control Display 81
Shifting, automatic transmis‐ sion 67
Shifting, manual transmis‐ sion 67
Shift paddles on steering wheel 69
Side airbags 91
Signaling, horn 14
Signals when unlocking 42
Sitting safely 47
Size 214
Slide/tilt glass roof 45
Snow chains 178
Socket 137
Socket, OBD Onboard Diag‐ nostics 186
Soot particulate filter 149 SOS button 201
Spare fuse 199
Specified engine oil types 184
Speed, average 80
Speed limit detection, on‐ board computer 80
Speed limiter, display 77
Speed Limit Information 77
Speed warning 81
Split screen 23
Sport automatic transmis‐ sion 69
Sport displays 80
SPORT program, Dynamic Driving Control 108
Sport program, transmis‐ sion 68
Stability control systems 106
Standard view, Head-up Dis‐ play 84
Start/stop, automatic func‐ tion 61
Start/Stop button 59
Start function during malfunc‐ tion 35
Starting the engine 60
Status display, tires 94
Status information, onboard monitor 23
Status of Owner's Manual 6
Steering wheel, adjusting 54
Steptronic, automatic trans‐ mission 67
Stopping the engine 60
Storage compartments 141
Storage, tires 174
Storing the vehicle 210
Summer tires, tread 172
Supplementary text mes‐ sages 73
Switch for Dynamic Driv‐ ing 108
Switch-on times, parked-car ventilation 132
Switch, refer to Cockpit 14
Symbols 6 Seite 226REFERENCEEverything from A to Z226
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