Intervention by braking or make an evasive ma‐
neuver.
Pedestrian warning Symbol in the instrument cluster.
If a collision with a person detected in this way
is imminent, the symbol lights up and a signal
sounds.
Yellow lights
Antilock Brake System ABS It reduces the braking distance to a
minimum during emergency stops.
Illuminated: avoid abrupt braking if pos‐
sible. Braking force boost in some
cases defective. Stop carefully. Take
into account longer brake travel. Have this
checked by the service center immediately.
DSC Dynamic Stability Control Flashing: DSC controls the drive and
braking forces. The vehicle is stabi‐
lized. Reduce speed and adapt driving
profile to the driving circumstances.
Illuminated: DSC failed. Have the system
checked by the service center.
For additional information, refer to Dynamic
Stability Control DSC, refer to page 129.
DSC Dynamic Stability Control deactivated DSC Dynamic Stability Control is
switched off.
For additional information, refer to Dy‐
namic Stability Control DSC, refer to
page 129.M Dynamic Mode MDM
M Dynamic Mode MDM is switched on.
For more information, see M Dynamic
Mode, refer to page 130.
Additional flashing: MDM controls the
drive and brake forces. The vehicle is
stabilized.
Illuminated: MDM failed. Have the sys‐
tem checked by the service center.
For more information, see M Dynamic
Mode, refer to page 130.
FTM Flat Tire Monitor The Flat Tire Monitor signals a loss of
tire inflation pressure in a tire.
Reduce your speed and stop cau‐
tiously. Avoid sudden braking and steering ma‐
neuvers.
For more information, see Flat Tire Monitor, re‐
fer to page 112.
Tire Pressure Monitor TPM Illuminated: the Tire Pressure Monitor
signals a loss of tire inflation pressure
in a tire.
Reduce your speed and stop cautiously. Avoid
sudden braking and steering maneuvers.
Flashing and then continuously illuminated: no
flat tire or loss of tire inflation pressure can be
detected.▷Interference through systems or devices
with the same radio frequency: after leav‐
ing the area of the interference, the system
automatically becomes active again.▷RDC could not conclude the reset: perform
the reset of the system again.▷A wheel without TPM electronics is fitted:
have the service center check it if needed.Seite 86ControlsDisplays86
Online Edition for Part no. 0140 2 956 361 - X/14
safety frame no longer engages in the lower
position.1.Press the release lever to the side and hold
it.2.Push down the safety frame and hold it.3.Release the release lever only if the safety
frame was pushed back almost completely.4.Close the convertible top.5.Slowly reduce pressure on the safety
frame in order to allow it to move upwards.
Make sure that your hands do not become
trapped between the safety frame and roof.
Malfunction
A Check Control message is displayed
when there is a malfunction.
Tire Pressure Monitor TPM The concept
The system monitors tire inflation pressure in
the four mounted tires. The system warns you
if there is a significant loss of pressure in one
or more tires. For this purpose, sensors in the
tire valves measure the tire inflation pressure
and tire temperature.
Hints Tire damage due to external factors
Sudden tire damage caused by external
circumstances cannot be recognized in ad‐
vance.◀
With use of the system observe further infor‐
mation found under Tire inflation pressure, re‐
fer to page 176.
Functional requirements The system must have been reset with the
correct tire inflation pressure; otherwise, relia‐
ble signaling of tire inflation pressure loss is
not assured.
Reset the system after each adjustment of the
tire inflation pressure and after every tire or
wheel change.
Always use wheels with TPM electronics to
ensure that the system will operate properly.
Status display The current status of the Tire Pressure Moni‐
tor TPM can be displayed on the Control Dis‐
play, e.g., whether or not the TPM is active.1."Vehicle info"2."Vehicle status"3. "Tire Pressure Monitor (TPM)"
The status is displayed.
Status control display Tire and system status are indicated by the
color of the wheels and a text message on the
Control Display.
All wheels green System is active and will issue a warning rela‐
tive to the tire inflation pressures stored during
the last reset.
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.
Seite 110ControlsSafety110
Online Edition for Part no. 0140 2 956 361 - X/14
Wheels, grayThe system cannot detect a flat tire. Reasons
for this may be:▷The system is being reset.▷Malfunction.
Status information
The status control display additionally shows
the current tire inflation pressures and possibly
tire temperatures. It shows the actual values
read; they may vary depending on driving style or weather conditions.
Carry out reset
Reset the system after each adjustment of the
tire inflation pressure and after every tire or
wheel change.
On the Control Display and on the vehicle:
1."Vehicle info"2."Vehicle status"3. "Perform reset"4.Start the engine - do not drive off.5.Reset tire inflation pressure:"Perform
reset".6.Drive away.
The tires are shown in gray and the status is
displayed.
After driving faster than 19 mph/30 km/h for a
short period, the set tire inflation pressures are
accepted as reference values. The reset is
completed automatically while driving.
After a successfully completed Reset, the
wheels on the Control Display are shown in
green and "Tire Pressure Monitor (TPM)
active" is displayed.
You may interrupt this trip at any time. When
you continue the reset resumes automatically.
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.▷No reset was performed for the system.
The system therefore issues a warning
based on the tire inflation pressures before
the last reset.1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.2.Identify the damaged wheel. Do so by
checking the tire inflation pressure using
the Mobility System. To correct the tire in‐
flation pressure3.Repair flat tire with the Mobility System or
replace the damaged wheel.
Required tire 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 done.▷Inflation was not carried out according to
specifications.▷The tire inflation 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 though tire inflation pressures are
correct.
The tire inflation pressure depends on the
tire's temperature. Driving or exposure to the
sun will increase the tire's temperature, thus
increasing the tire inflation pressure. The tire
inflation pressure is reduced when the tire
Seite 111SafetyControls111
Online Edition for Part no. 0140 2 956 361 - X/14
temperature falls again. These circumstances
may cause a warning when 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 inflation pressure can be de‐
tected.
Display in the following situations:▷A wheel without TPM electronics is fitted:
have the service center check it if needed.▷Malfunction: have the system checked by
your service center.▷TPM was unable to complete the reset.
Reset the system again.▷Interference through systems or devices
with the same radio frequency: after leav‐
ing the area of the interference, 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 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 tire inflation pressure losson the basis of rotation speed differences be‐
tween the individual wheels while driving.
In the event of a tire inflation pressure loss, the
diameter and therefore the rotational speed of
the corresponding wheel changes. This will be
detected and reported as a flat tire.
The system does not measure the actual infla‐
tion pressure in the tires.Seite 112ControlsSafety112
Online Edition for Part no. 0140 2 956 361 - X/14
Functional requirements
The system must have been initialized when
the tire inflation pressure was correct; other‐
wise, reliable flagging of a flat tire is not as‐
sured. Initialize the system after each correc‐
tion 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.
On the Control Display:1."Vehicle info"2."Vehicle status"3. "Flat Tire Monitor (FTM)"
The status is displayed.
Initialization
When initializing the once set inflation tire
pressures serve as reference values in order to
detect a flat tire. Initialization is started by con‐
firming the tire inflation pressures.
Do not initialize the system when driving with
snow chains.
On the Control Display:
1."Vehicle info"2."Vehicle status"3. "Perform reset"4.Start the engine - do not drive off.5.Start the initialization with "Perform 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.Identify the damaged wheel. Do so by
checking the tire inflation pressure using
the Mobility System. If the tire inflation
pressure in all tires is correct, the Flat Tire
Monitor may not have been initialized. In
this case, initialize the system.3.Repair flat tire with the Mobility System or
replace the damaged wheel.
System limits
Sudden tire damage
Sudden serious tire damage caused by
external circumstances cannot be recognized
in advance.◀
A natural, even tire inflation pressure loss in all
four tires will not be recognized. Therefore,
check the tire inflation 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: spinning traction
wheels, high lateral acceleration (drifting).▷When driving with snow chains.
Intelligent Safety
The concept
Intelligent Safety enables central operation of
the driver assistance system.
Depending on how the vehicle is equipped, In‐
telligent Safety consists of one or more sys‐
tems that can help prevent a imminent colli‐
sion. These systems are active automatically
Seite 113SafetyControls113
Online Edition for Part no. 0140 2 956 361 - X/14
Wheels and tiresVehicle features and options
This chapter describes all standard, country-
specific and optional features offered with the
series. It also describes features that are not
necessarily available in your car, e. g., due to
the selected options or country versions. This
also applies to 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 tire inflation pressure
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 have a natural, consistent loss of tire in‐
flation pressure.
Tires heat up while driving, and the tire infla‐
tion pressure increases along with the tire's
temperature. The tire inflation pressure speci‐
fications 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 1.45 psi/0.1 bar.
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.
Tire inflation pressure specifications
The tire inflation pressure table, refer to
page 177, contains all tire inflation pressure
specifications for the specified tire sizes at the
ambient temperature. Tire inflation pressure
specifications apply to approved 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 177, and adjust as necessary.
Seite 176MobilityWheels and tires176
Online Edition for Part no. 0140 2 956 361 - X/14
Parking brake 73
Parking lights 101
Parking lights and roadside parking lights, refer to Light-
emitting diodes, LEDs 194
Passenger side mirror, tilting downward 62
Pathway lines, rearview cam‐ era 140
PDC Park Distance Con‐ trol 136
Pedestrian detection, see Night Vision 119
Pedestrian warning with city braking function 117
Personal Profile 35
Personal Profile, exporting profiles 36
Pinch protection system, win‐ dows 46
Plastic, care 208
Power failure 197
Power windows 45
Pressure, tire air pres‐ sure 176
Pressure warning FTM, tires 112
Preventing Auto Start Stop 72
Profile, refer to Personal Pro‐ file 35
Programmable memory but‐ tons, iDrive 23
Protective function, win‐ dows 46
Push-and-turn reel, refer to Controller 18
R Radiator fluid 190
Radio-operated key, refer to Remote control 34
Radio ready state 70 Radio, see user's manual for
Navigation, Entertainment
and Communication
Rain sensor 76
Rear lights 195
Rearview camera 138
Rearview mirror 62
Rear window defroster 147
Recirculated-air mode 146
Recommended fuel grade 174
Recommended tire brands 180
Refueling 172
Remaining range 90
Remote control/key 34
Remote control, malfunc‐ tion 39
Remote control, univer‐ sal 149
Replacement fuse 197
Replacing bulbs, see Lamp replacement 193
Replacing parts 193
Replacing wheels/tires 180
Reporting safety defects 9
RES button, see Cruise con‐ trol 134
Reserve warning, refer to Range 90
Reset, Tire Pressure Monitor TPM 111
Residual heat, automatic cli‐ mate control 147
Retaining straps, securing cargo 167
Retreaded tires 180
Reversing lamp, bulb replace‐ ment 196
Roadside parking lights 102
Rollover protection sys‐ tem 109
RON recommended fuel grade 174
Rope for tow-starting/ towing 203 Rubber components,
care 208
S
Safe braking 164
Safety 7
Safety belt reminder for driv‐ er's seat and front passen‐
ger seat 59
Safety belts 58
Safety belts, care 208
Safety Package, refer to Ac‐ tive Protection 126
Safety systems, airbags 106
Saving fuel 168
Screen, refer to Control Dis‐ play 18
Screwdriver, see Onboard ve‐ hicle tool kit 193
Screw thread, see screw thread for tow fitting, screw
thread for tow fitting 204
Sealant 181
Seat belts, refer to Safety belts 58
Seat heating, front 57
Seating position for chil‐ dren 66
Seat, mirror, and steering wheel memory 61
Seats 55
Seat ventilation, front 57
Selection list in instrument cluster 94
Selector lever 78
Selector lever position 78
Sensors, care 209
Sequential mode 79
Service and warranty 8
Service requirements, Condi‐ tion Based Service
CBS 191
Service requirements, dis‐ play 92 Seite 220ReferenceEverything from A to Z220
Online Edition for Part no. 0140 2 956 361 - X/14