
On-board computer
Assistance menu ........................... 187
Audi omenu ................................... 185
Convenience submenu ..................192
Displaying a service message ........264
Display messages ..........................193
Factory settings submenu .............192
Important safety notes ..................178
Lighting submenu .......................... 190
Menu overview .............................. 182
Message memory .......................... 193
Navigation menu ............................ 184
Operation ....................................... 180
Service menu ................................. 189
Settings menu ............................... 189
Standard display. ........................... 182
Telephone menu ............................ 186
Trip menu ...................................... 182
Vehicle submenu ........................... 191
Video DVD operation. ....................186
Opening and closing the side trim
panels ................................................. 106
Operating system see On-board computer
Outside temperature display ...........179
Overhead control panel ......................32
Override feature Rea rside windows ........................... 58 P
Pain tcode number ............................ 323
Paintwork (cleaning instructions) ...267
Panic alarm .......................................... 36
Panorama roof with power tilt/
sliding panel
Opening/closing the roller
sunblind ........................................... 81
Problem (malfunction) .....................82
Resetting ......................................... 81
Panorama sliding sunroof
Important safety notes ....................80
Parcel net ........................................... 233
Parking ............................................... 141
Important safety notes ..................141
Parking brake ................................ 142Position of exterior mirror, front-
passenger side ................................. 92
Rea
rview camera .......................... 168
see PARKTRONIC
Parking aid
Active Parking Assist .....................164
see Exterior mirrors
see PARKTRONIC
Parking brake
Display message ............................ 197
Electric parking brake ....................142
Warning lamp ................................. 225
Parking lamps
Switching on/off .............................. 98
Parking lamps (changing bulbs) ......105
PARKTRONIC Deactivating/activating .................163
Driving system ............................... 161
Function/notes ............................. 161
Important safety notes ..................161
Problem (malfunction) ...................164
Range of the sensors .....................162
Warning displa y............................. 162
PASSENGE RAIRBAG OFF indicator
lamp ...................................................... 50
Plastic trim (cleaning instructions) .269
Power washers .................................. 266
Power windows see Side windows
Product information ............................20
Program selector button ..................135
Protection of the environment General notes .................................. 20
Pulling away
Automatic transmission .................127 Q
Qualifie dspecialis tworkshop ...........23 R
Radar sensor system Activating/deactivating .................192
Display message ............................ 209
Radio
Selecting astation ......................... 185
see separate operating instructions Index
13

If you feel a sudden significant vibratio
nor
ride disturbance, or you suspect that damage
to yourv ehicle has occurred:
R turn on your hazard warning flashers.
R slow down carefully.
R drive with caution to an area which is a safe
distance from the road.
Inspec tthe vehicle underbody and tires/
wheels for possible damage. If the vehicle
appears unsafe, have it towed to the nearest
authorized Mercedes-Ben zCenter or other
qualified maintenance or repair facility for
further inspection or repairs. Declarations of conformity
Vehicle components which receive
and/or transmit radio waves USA:
"The wireless devices of this vehicle
comply with Part 15 of the FCC Rules.
Operation is subject to the following two
conditions :1) These devices may not cause
harmful interference, and 2) These devices
must accept any interference received,
including interference that may cause
undesired operation. Changes or
modifications not expressly approved by the
party responsible for compliance could void
the user’s authority to operate the
equipment."
Canada: "The wireless devices of this vehicle
comply with Industry Canada license-exempt
RSS standard(s). Operation is subjec tto the
following two conditions: (1) These devices
may not cause interference, and (2) These
devices must accept any interference,
including interference that may cause
undesired operation of the device." Diagnostics connection
G
WARNING
If you connect equipment to the on-board
diagnostics connection, it can affect the operation of the vehicle systems. This can
impair the operating safety of your vehicle
while driving. There is a risk of an accident.
Do not connect any equipment to the on-
board diagnostics connection.
G
WARNING
Loose equipment or equipment cables which
are connected to the on-board diagnostics
connection can obstruct the area around the
pedals. The equipment or the cables could
come between the pedals in the event of
sudden braking or acceleration. This may
affect the function of the pedals. There is a
risk of an accident.
Do not attach any equipment or cables in the
driver's footwell.
! If the engine is switched off and
equipment on the diagnostics connection
is used, the starter battery may discharge.
The diagnostics connection is only intended
for the connection of diagnostic equipment at
a qualified specialist workshop.
Connecting equipment to the diagnostics
connection can, for example, lead to
emissions monitoring information being
reset. This may lead to the vehicle failing to
meet the requirements of the next emissions
test during the main inspection. Qualified specialist workshop
An authorized Mercedes-Benz Center is a
qualified specialist workshop. It has the
necessary specialist knowledge, tools and
qualifications to correctly carry out the work
required on your vehicle. This is especially the
case for work relevant to safety.
Observe the notes in the Maintenance
Booklet.
Always have the following work carried out at
an authorized Mercedes-Benz Center:
R work relevant to safety
R service and maintenance work Introduction
23 Z

Problems with the SmartKey
Problem Possible causes/consequences and
M Solutions
You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X
Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the %or
& button.
If this does not work:
X Check the SmartKey battery and replace it if necessary
(Y page 70).
X Unlock (Y page 75) or lock (Y page 75) the vehicle using the
mechanical key. There is interference from a powerful source of radio waves.
X
Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the %/
& button. The SmartKey is faulty.
X
Unlock (Y page 75) or lock (Y page 75) the vehicle using the
mechanical key.
X Have the SmartKey checked at a qualified specialist workshop. You have lost a
SmartKey. X
Have the SmartKey deactivated at a qualified specialist
workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 72
SmartKeyOpening/closing

Problems with PARKTRONIC
Problem Possible causes/consequences and
M Solutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is
deactivated after
approximately
20 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
specialist workshop. Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is
deactivated after
approximately
20seconds. The PARKTRONIC sensors are dirty or there is interference.
X
Cleant he PARKTRONIC sensors (Y page 269).
X Switch the ignition back on. The problem may be caused by an external source of radio or
ultrasound waves.
X
See if PARKTRONIC functions in a different location. Active Parking Assist
Important safety notes Active Parking Assist is merely an aid. It is not
a replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting a parking space. When
maneuvering, parking or pulling out of a
parking lot, make sure that there are no
persons, animals or objectsint
he area in
which you are maneuvering. G
WARNING
The vehicle swings out when parking and in
doing so could cross into the opposite lane.
This could result in a collision with another
road user. There is a risk of an accident.
Pay attention to other road users when
parking. Stop the vehicle if necessary or cancel the Active Parking Assist parking
procedure.
! If unavoidable, you should drive over
obstacles such as curbs slowly and not at
a sharp angle. Otherwise, you may damage
the wheels or tires.
Active Parking Assist may possibly indicate
parking spaces which are not suitable for
parking, for example:
R where parking or stopping is prohibited
R in front of driveways or entrances and exits
R on unsuitable surfaces 164
Driving systemsDriving and parking

Other status indicators of the
navigation system
R
O:y ou have reached the destination or an
intermediate destination.
R New Route... or
Calculating Route :
calculating a new route
R Off Map or
Off Mapped Road :t
he vehicle
position is outside the area of the digital
map (off-map position).
R No Route :n
o route could be calculated to
the selected destination. Audio menu
Selecting aradio station :
Waveband
; Station frequency with memory position
i The memory position is only displayed
along with station ;if this has been
stored.
X Switch on the audio system or COMAND
and select Radio; see the separate
operating instructions.
X Press the =or; button on the
steering wheel to select the Audio menu.
X To selectas toredstation: briefly press
the 9 or: button.
X To select a station from the station
list: press and briefly hold the 9
or : button.
If no statio nlist is received:
X To select astation using the station
search: press and briefly hold the 9
or : button. i
For information on changing waveband
and storing stations, see the separate
operating instructions.
i SIRIUS XM satellite radio functions like a
normal radio.
For more informatio nonsatellite radio
operation, see the separate operating
instructions.
Operating audio player or audio media CD changer display (example)
:
Current CD in the CD changer
; Current title
Audio data from various audio devices or
media can be played, dependin gonthe
equipment installed in the vehicle.
X Switch on the audio system or COMAND
and activate audio CD/DVDm ode or MP3
mode; see the separate operating
instructions.
X Press the =or; button on the
steering wheel to select the Audio menu.
X To select the next/previous track:
briefly press the 9or: button.
X To select a track from the track list
(rapid scrolling): press and hold the
9 or: button until desired
track ;has been reached.
If you press and hold 9or:, the
rapid scrolling speed is increased. Not all
audio drives or data carriers support this
function.
If track information is stored on the audio
device or medium, the multifunction display
will show the number and title of the track.
The current track does not appear in audio Menus and submenus
185On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
PRE-SAFE
Functions
Currently Limited
See Operator's
Manual Adaptive Brake Assis
tis temporarily inoperative. Possible causes
are:
R the radar sensor system cover in the radiator grill is dirty.
R function is impaired due to heavy rain or snow.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
When the causes stated above no longer apply, the display
message disappears.
Adaptive Brake Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 141).
X Cleant he radar sensor cover in the radiator grill (Y page 269).
X Restart the engine. PRE-SAFE
Functions Limited
See Operator's
Manual Adaptive Brake Assist is faulty. The distance warning signal may
also have failed.
X
Visit a qualified specialist workshop. 6
SRS Malfunction
Service Required There is a malfunction in the SRS (Supplemental Restraint
System). The
6warning lamp also lights up in the instrument
cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
Further information on occupant safety (Y page 36). Display messages
201On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
Lane Keeping
Assist Currently
Unavailable See
Operator's Manual Lane Keeping Assis
tis deactivated and temporarily inoperative.
Possible causes are:
R the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
R there are no lane markings for a longer period.
R the lane markings are worn, dark or covered, e.g. by dirt or snow.
When the causes stated above no longer apply, the display
message disappears.
Lane Keeping Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 141).
X Cleant he windshield. Lane Keeping
Assist Inoperative Lane Keeping Assist is faulty.
X
Visit a qualified specialist workshop. Blind Spot Assist
Currently
Unavailable See
Operator's Manual Blind Spot Assist is temporarily inoperative. Possible causes are:
R
the sensors are dirty.
R function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
The yellow 9indicator lamps also light up in the exterior
mirrors.
When the causes stated above no longer apply, the display
message disappears.
Blind Spot Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 141).
X Cleant he sensors (Y page 269).
X Restart the engine. 210
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
DISTRONIC PLUS
Currently
Unavailable See
Operator's Manual DISTRONIC PLU
Sis temporarily inoperative. Possible causes are:
R function is impaired due to heavy rain or snow.
R the sensors in the bumpers are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Aw arning tone also sounds.
When the causes stated above no longer apply, the display
message disappears.
DISTRONIC is operational again.
If the display message does notd isappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 141).
X Clean the sensors in the radiator trim (Y page 269).
X Restar tthe engine. DISTRONIC PLUS
Inoperative DISTRONIC PLUS is defective. Adaptive Brake Assist may also
have failed.
Aw
arning tone also sounds.
X Visi taqualified specialist workshop. DISTRONIC PLUS
Passive You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Remove your foot from the accelerator pedal. DISTRONIC PLUS
--- mph An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation conditions for DISTRONIC PLUS
(Y page 154). 212
Display messagesOn-board computer and displays