
General notes ................................ 172
Home address
See also Digital Owner's Manual .. .253
Horn ...................................................... 30 I
Ignition lock see Key positions
Immobiliser .......................................... 74
Indicator and warning lamp
Restraint system ............................ 248
Indicator and warning lamps
Coolant .......................................... 249
Engine diagnostics ......................... 249
SPORT handling mode ................... 248
Indicator lamps
Display message ............................ 228
see Warning and indicator lamps
Indicators
see Turn signals
Instrument cluster
Overview .......................................... 32
Instrument cluster lighting .............. 199
Intelligent Light System
Activating/deactivating ................. 209
Display message ............................ 228
Overview ........................................ 115
Setting the dipped-beam head-
lamps for driving on the right/left .. 210
Interior lighting
Automatic control system .............. 118
Delayed switch-off (on-board
computer) ...................................... 211
Overview ........................................ 117
Reading lamp ................................. 117
Setting the ambient lighting
brightness (on-board computer) .... 210
Setting the ambient lighting col-
our (on-board computer) ................ 210
Interior motion sensor
Deactivating ..................................... 76
Function .......................................... .75
Priming ............................................ 75
Switching off .................................... 76
iPod ®
See also Digital Owner's Manual ... 253
ISOFIX child seat securing system ....56 J
Jack Storage location ............................2 88
Using ............................................. 313
Jump starting (engine) ......................296 K
Key Changing the battery ....................... 80
Checking the battery ....................... 80
Display message ............................ 243
Door central locking/unlocking ....... 77
Emergency key element ................... 79
Important safety notes .................... 77
Loss ................................................. 81
Modifying the programming ............. 78
Opening/closing the roof ................ 95
Overview .......................................... 77
Positions (ignition lock) ................. 132
Problem (malfunction) ..................... 81
Starting the engine ........................ 134
Key positions
Key ................................................ 132
KEYLESS GO .................................. 132
KEYLESS-GO
Activating ......................................... 78
Convenience closing ........................ 91
Deactivation ..................................... 78
Display message ............................ 243
Locking ............................................ 78
Removing the Start/Stop button ... 133
Start/Stop button .......................... 132
Starting the engine ........................ 134
Unlocking ......................................... 78
Kickdown
Driving tips ................................... .145
Manual gearshifting ....................... 150 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
see Active Lane Keeping Assist
Lap time (RACETIMER) ......................213
Licence plate lamp (display mes-
sage) ................................................... 228 12
Index

Problems with PARKTRONIC
Problem
Possible causes/consequences and
M
MSolutions Only the red segments in
the PARKTRONIC warn-
ing displays are lit. You
also hear a warning tone
for approximately two
seconds.
PARKTRONIC is deacti-
vated after approx-
imately five seconds,
and the indicator lamp in
the PARKTRONIC button
lights up. PARKTRONIC has malfunctioned and has switched off.
X If problems persist, have PARKTRONIC checked at a qualified spe-
cialist workshop. Only the red segments in
the PARKTRONIC warn-
ing displays are lit.
PARKTRONIC is deacti-
vated after approx-
imately five seconds. The PARKTRONIC sensors are dirty or there is interference.
X
Clean the PARKTRONIC sensors (Y page 285).
X Switch the ignition back on. The problem may be caused by an external source of radio or ultra-
sound waves.
X See if PARKTRONIC functions in a different location. Active Parking Assist
General notes Active Parking Assist is an electronic parking aid
with ultrasound. It measures the road on both
sides of the vehicle. A parking symbol indicates a suitable parking space. Active steering inter-
vention can assist you during manoeuvring and
parking. You may also use PARKTRONIC
(Y page 180).
Important safety notes Active Parking Assist is only an aid. It is not a
substitute for your attention to the immediate
surroundings. The responsibility for safe
manoeuvring and parking remains with you.
Make sure that no persons, animals or objects
are in the manoeuvring range.
When PARKTRONIC is deactivated, Active Park-
ing Assist is also unavailable. G
WARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could cause you to collide with other road users.
There is a risk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active Park-
ing Assist parking procedure.
! If unavoidable, you should drive over obsta-
cles such as kerbs slowly and not at a sharp
angle. Otherwise, you may damage the
wheels or tyres.
Active Parking Assist may also display spaces
not suitable for parking, e.g.: R parking or stopping restrictions
R in front of driveways or entrances and exits
R unsuitable surfaces
Parking tips:
R on narrow roads, drive as closely as possible
past the parking space
R parking spaces that are littered or overgrown
might be identified or measured incorrectly
R parking spaces that are partially occupied by
trailer drawbars might not be identified as
such or be measured incorrectly Driving systems
183Driving and parking Z

Important safety notes
G
WARNING
Operating the integrated information systems and communications equipment in the vehicle
while driving will distract you from traffic con-
ditions. You could then lose control of the
vehicle. There is a risk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the
surrounding conditions, pull over to a safe
location and make entries only while the vehi-
cle is stationary.
You must observe the legal requirements for the country in which you are currently driving whenoperating the on-board computer. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognise function
restrictions relevant to safety. The operating
safety of your vehicle may be impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
The on-board computer only shows messages or warnings from certain systems in the multifunc-tion display. You should therefore make sure
your vehicle is operating safely at all times.
If the operating safety of your vehicle is
impaired, park the vehicle safely as soon as pos- sible. Contact a qualified specialist workshop.
For an overview, see the instrument cluster illus-
tration (Y page 32). Displays and operation
Instrument cluster lighting
The lighting in the instrument cluster, in the dis- plays and the controls in the vehicle interior can
be adjusted using the brightness control knob.
The brightness control knob is located on the
bottom left of the instrument cluster
(Y page 32). X
Turn the brightness control knob clockwise or
anti-clockwise.
If you turn the light switch (Y page 113) to the
Ã, TorL position, the brightness
will depend upon the brightness of the ambi-
ent light.
The light sensor in the instrument cluster
automatically controls the brightness of the
multifunction display. In daylight, the displays in the instrument cluster are not illuminated. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 159):
The segments light up from the stored speed to the maximum speed.
R Variable speed limiter is activated
(Y page 170):
The segments light up from the start of the
scale to the selected limit speed.
R Distance Pilot DISTRONIC is activated
(Y page 161):
One or two segments in the set speed range
light up.
R Distance Pilot DISTRONIC detects a vehicle in
front moving more slowly than the stored
speed:
The segments between the speed of the vehi-
cle in front and the stored speed light up. Rev counter
! Do not drive in the overrevving range. Doing
so will damage the engine.
The red band in the rev counter indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Bear in mind that the outside temperature dis-
play indicates the measured air temperature
and not the road surface temperature. Displays and operation
199On-board computer and displays Z

Example: current tyre pressure display
For further information on displaying this mes-
sage, refer to the "Checking the tyre pressure
electronically" section (Y page 310).
Important safety notes It is the driver's responsibility to set the tyre
pressure to the recommended cold tyre pres-
sure suitable for the operating situation
(Y page 307). Note that the correct tyre pres-
sure for the current operating situation must
first be taught-in to the tyre pressure monitor. If
there is a substantial loss of pressure, the warn- ing threshold for the warning message is aligned
to the reference values taught-in. Restart the
tyre pressure monitor after adjusting to the cold tyre pressure (Y page 311). The current pres-
sures are saved as new reference values. This
will ensure that a warning message will only
appear if the tyre pressure drops significantly.
The tyre pressure monitor does not warn you of
an incorrectly set tyre pressure. Observe the
notes on the recommended tyre pressure
(Y page 307).
The tyre pressure monitor is not able to warn
you of a sudden loss of pressure, e.g. if the tyre is penetrated by a foreign object. In the event of
a sudden loss of pressure, bring the vehicle to a halt by braking carefully. Avoid abrupt steering
manoeuvres.
The tyre pressure monitor has a yellow warning
lamp in the instrument cluster for indicating a
pressure loss or malfunction. Depending on how
the warning lamp flashes or lights up, a tyre
pressure that is too low or a malfunction in the
tyre pressure monitor is indicated:
R if the warning lamp is lit continuously, the tyre
pressure on one or more tyres is significantly
too low. The tyre pressure monitor is not mal- functioning.
R if the warning lamp flashes for around a
minute and then remains lit constantly, the
tyre pressure monitor is malfunctioning. In addition to the warning lamp, a message
appears in the multifunction display. Observe
the information on display messages
(Y page 237).
It may take up to ten minutes for a malfunction
of the tyre pressure monitor to be indicated. A
malfunction will be indicated by the tyre pres-
sure warning lamp flashing for approximately
one minute and then remaining lit. When the
fault has been rectified, the tyre pressure warn- ing lamp goes out after you have driven for a few
minutes.
The tyre pressure values indicated by the on-
board computer may differ from those meas-
ured at a filling station using a pressure gauge.
The tyre pressures shown by the on-board com- puter refer to those measured at sea level. At
high altitudes, the tyre pressure values indica-
ted by a pressure gauge are higher than those
shown by the on-board computer. In this case,
do not reduce the tyre pressures.
The operation of the tyre pressure monitor can
be affected by interference from radio transmit-
ting equipment (e.g. radio headphones, two-way radios) that may be being operated in or near the vehicle.
Checking the tyre pressure electroni-
cally X
Make sure that the key is in position 2in the
ignition lock (Y page 132).
X Press the =or; button on the steering
wheel to select the Service
Service menu.
X Press the 9or: button to select
Tyre pressure Tyre pressure.
X Press the abutton.
The current tyre pressure for each wheel will
be displayed in the multifunction display.
If the vehicle has been parked for over
20 minutes, the Tyre pressures will be Tyre pressures will be
displayed
displayed after
aftera
a few
few minutes
minutes of
ofdriv‐
driv‐
ing
ing message appears.
After a teach-in period, the tyre pressure moni-
tor automatically detects new wheels or new
sensors. As long as a clear allocation of the tyre pressure values to the individual wheels is not
possible, the Tyre Tyrepressure
pressure monitor
monitoractive
active
display message is shown instead of the tyre
pressure display. The tyre pressures are already being monitored.
If an emergency spare wheel is fitted, for a few
minutes the system may continue to show the 310
Tyre pressureWheels and tyres