One wheel is yellow
A flat tire or major drop in inflation pressure in
the indicated tire.
All wheels are yellow
A flat tire or major drop in inflation pressure in
several tires.
Wheels, gray
The system cannot detect a flat tire. Reasons for
this may be:▷The system is being reset.▷Malfunction.
Carry out reset
Reset the system after each correction of the
tire inflation pressure and after every tire or
wheel change.
1."Vehicle Info"2."Vehicle status"3. "Reset"4.Start the engine - do not drive away.5.Carry out the reset with "Reset".6.Drive away.
The tires are shown in gray and the status is dis‐
played.
After driving faster than 19 mph/30 km/h for a
short period, the tire inflation pressures set are
accepted as reference values. The reset is com‐
pleted automatically during driving. After suc‐
cessful completion of the reset, the tires appear
in green on the Control Display and "TPM
active" is displayed.
The trip can be interrupted at any time. If you
drive away again, the reset resumes automati‐
cally.
Low tire pressure message The yellow warning lamp lights up. A
Check Control message is displayed.
▷There is a flat tire or a major loss in tire in‐
flation pressure.▷A reset of the system was not carried out af‐
ter a wheel was changed. The system there‐
fore issues a warning based on the tire pres‐
sures before the last reset.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 175, 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 low inflation pressure is indicated, DSC
Dynamic Stability Control is switched on if nec‐
essary.
Actions in the event of a flat tire
Normal tires
1.Identify the damaged tire.
Do this by checking the air pressure in all
four tires.
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.
If an identification is not possible, please
contact the service center.2.Rectify the flat tire.
Use of tire sealant, e.g., the Mobility System,
may damage the TPM wheel electronics. In
this case, have the electronics checked at
the next opportunity and have them re‐
placed if necessary.Seite 99SafetyControls99
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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 con‐
tinue driving, and contact your service center. ◀
Message when the system was not
reset
A Check Control message is displayed.
The system has detected a wheel change, but
no reset was carried out
Warnings regarding the current tire inflation
pressure are not reliable.
Check the tire inflation pressure and carry out a
reset of the system.
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 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:Seite 100ControlsSafety100
Online Edition for Part no. 01 40 2 917 825 - II/13
▷A wheel without TPM electronics is fitted:
have the service 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 automatically
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 la‐
bel, you should determine the proper tire infla‐
tion pressure for those tires.) As an added safety
feature, your vehicle has been equipped with a
tire pressure monitoring system (TPMS) that il‐
luminates a low tire pressure telltale when one
or more of your tires is significantly under-in‐
flated. 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. Under-inflation also
reduces fuel efficiency and tire tread life, and
may affect the vehicle's handling and stopping
ability. Please note that the TPMS is not a sub‐
stitute 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 indicator to
indicate when the system is not operating prop‐
erly. The TPMS malfunction indicator is com‐
bined with the low tire pressure telltale. When
the system detects a malfunction, the telltale will
flash for approximately one minute and then re‐
main continuously illuminated. This sequence
will continue upon subsequent vehicle start-ups
as long as the malfunction exists. When the mal‐
function 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
replacement 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.
It detects a pressure loss in a tire by comparing
the rotational speeds of the individual wheels
while moving.
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.
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"Seite 101SafetyControls101
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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 175, 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.
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.
Actions in the event of a flat tire
Normal tires
1.Identify the damaged tire.
Do this by checking the air pressure in all
four tires.
If the tire inflation pressure in all four tires is
correct, the Flat Tire Monitor may not have
been initialized. In this case, initialize the
system.
If an identification is not possible, please
contact the service center.2.Rectify 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.
Seite 102ControlsSafety102
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Rain sensor 69
Rear lamps 189
Rear socket 143
Rearview mirror 56
Rear window defroster 134
Recirculated-air filter 134
Recirculated-air mode 133
Recommended tire brands 174
Refueling 166
Remaining range 78
Remote control/key 34
Remote control, auxiliary air conditioning, key 136
Remote control, malfunc‐ tion 40
Remote control, universal 138
Replacement fuse 192
Replacing parts 183
Replacing wheels/tires 173
Reporting safety defects 9
Reserve warning, refer to Range 78
Reset, Tire Pressure Monitor TPM 99
Residual cooling 136
Retaining straps, securing cargo 157
Retreaded tires 174
Roadside parking lamps 91
Roller sunblinds 47
RON gasoline quality 168
Roof load capacity 207
Roof-mounted luggage rack 157
Rope for tow-starting/tow‐ ing 198
RSC Run Flat System Compo‐ nent, refer to Run-flat
tires 175
Rubber components, care 202
Run-flat tires 175 S
Safe braking 154
Safety 7
Safety belt reminder for driv‐ er's seat and front passenger
seat 53
Safety belts 52
Safety belts, care 202
Safety of the hybrid sys‐ tem 198
Safety Package, refer to Active Protection 108
Safety switch, windows 46
Safety systems, airbags 95
Saving fuel 159
Screen, refer to Control Dis‐ play 18
Screwdriver 183
Screw thread for tow fit‐ ting 198
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 84
Selector lever, automatic transmission 72
Sensors, care 203
Service and warranty 8
Service history 82
Service requirements, Condi‐ tion Based Service CBS 181
Service requirements, dis‐ play 81
Service, Roadside Assis‐ tance 195
Settings on Control Dis‐ play 87
Settings, storing for seat, mir‐ ror 55 Shifting, automatic transmis‐
sion 71
Shift paddles on steering wheel 73
Side airbags 95
Side View 125
Signaling, horn 14
Signals when unlocking 39
Silent Start, electric drive read‐ iness 64
Sitting safely 49
Size 206
Slide/tilt glass roof 47
Smallest turning circle 207
Snow chains 175
Socket 142
Socket, OBD Onboard Diag‐ nostics 182
SOS button 194
Spare fuse 192
Specified engine oil types 179
Speed, average 85
Speed limit detection, on‐ board computer 85
Speed limiter, display 82
Speed Limit Information 82
Speed limit in the com‐ puter 85
Split screen 23
SPORT+ - program, Dynamic Driving Control 113
Sport automatic transmis‐ sion 73
Sport displays, torque display, performance display 87
SPORT program, Dynamic Driving Control 113
Sport program, transmis‐ sion 72
Sport steering, variable 112
Stability control systems 111
Start/Stop button 63
Start function during malfunc‐ tion 35 Seite 216ReferenceEverything from A to Z216
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