
Problems with the auxiliary heating/ventilation
Display messages Possible causes/consequences and
M Solutions
FAIL The starter battery is not charged sufficiently or the system is
faulty.
X
Charge the starter battery.
X Make another attempt to switch on the auxiliary heating using
the remote control.
X Have the auxiliary heating checked at a qualified specialist
workshop. $
FAIL The signal transmission between the transmitter and the vehicle
is faulty.
X
Change your position in relation to the vehicle, moving closer if
necessary.
X Make another attempt to switch the auxiliary heating on or off
using the remote control. ©
FAIL There is not enough fuel in the fuel tank, or the auxiliary heating
is faulty.
X
Refuel at the nearest filling station.
X Make another attempt to switch on the auxiliary heating using
the remote control.
X Have the auxiliary heating checked at a qualified specialist
workshop. Adjusting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air
vents. This could cause burns or frostbite to
bare skin in the immediate vicinity of the
vents. Keep bare skin away from these air
outlets. If necessary, direct the airflow away
to a different area of the vehicle interior. In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R
keep the air inlet between the windscreen
and the bonnet free of blockages, such as
ice, snow or leaves
R never cover the vents or air inlets in the
vehicle interior.
i For virtually draught-free ventilation,
adjust the sliders of the air vents to the
centre position. Adjusting the air vents
149Climate control Z

Problems with the transmission
Problem Possible causes/consequences and
M Solutions
The transmission has
problems shifting gear. The transmission is losing oil.
X
Have the transmission checked at a qualified specialist work-
shop immediately. The acceleration ability
is deteriorating.
The transmission no
longer changes gear. The transmission is in emergency mode.
It is only possible to shift into
secondgear and reverse gear.
X Stop.
X Shift the transmission to position P.
X Switch off the engine.
X Wait at least 10seconds before restarting the engine.
X Shift the transmission to position Dor R.
If D is selected, the transmission shifts into secondgear; ifRis
selected, the transmission shifts into reverse gear.
X Have the transmission checked at a qualified specialist work-
shop immediately. Releasing the parking lock manually
i The following description does not apply
to vehicles with a DIRECT SELECT lever and
AMG vehicles.
In the event of an electrical fault, it is possible
to release the selector lever lock manually to
move it out of position P, e.g. if you wish to
tow the vehicle away. X
Apply the parking brake.
X Prise out selector lever gaiter :with a flat,
blunt object, (e.g. ascrewdriver wrapped in cloth) from the right-hand edge, pulling it
up and out.
X Press release button ;dow nand simul-
taneously move the selecto rlever out of
position P.
The selector lever can now be moved freely
until it is returned to position P. Refuelling
Important safety notes
G
WARNING
Fuel is highly flammable. Fire, naked flames
and smoking are therefore prohibited when
handling fuels.
Switch off the engine and the auxiliary heating
before refuelling. G
WARNING
Avoid contact with fuels.
It is hazardous to your health if your skin
comes into direct contact with fuels or you
breathe in fuel vapours. 172
RefuellingDriving and parking

Audio player or audio media operation
Audio data from various audio devices or
media can be played, depending on the equip-
ment fitted in the vehicle.
X
Switch on the audio system or COMAND
AP Sa nd select the audio device or medium
(see the separate operating instructions).
X Press the =or; button on the steer-
ing wheel to select the Audio menu.
Example: CD change
rdisplay
: Current track
X To select the next/previou strack:
briefly press the 9or: button.
X To select a track from the track list
(rapid scrolling): press and hold the
9 or: button until the desired track
has been reached.
If you press and hold the 9or: but-
ton, the rapid scrolling speed is increased.
Not all audio devices or media support this
function.
If track information is stored on the audio
device or medium, the multifunctio ndisplay
will show the number and name of the track.
The current track does not appear in audio
AUX mode (Aux iliary audio mode: external
audio source connected).
TV operation i
Depending on the digital TV broadcaster,
radio stations can also be received. The
multifunction display shows TV (Radio) .
For selecting a radio station, see
(Y page 237). X
Switch on COMAND APS and selec tTV(see
the separate operating instructions).
X Press the =or; button on the steer-
ing wheel to select the Audio menu.
:
Current channel
X To selectas toredchannel: briefly press
the 9 or: button.
X To selectac hannel from the channel
list: press and briefly hold the 9
or : button.
Video DVD operation X
Switch on COMAND APS and select video
DVD (see the separate operating instruc-
tions).
X Press the =or; button on the steer-
ing wheel to select the Audio menu.
Example
:DVD changer display
: Current scene
X To select the next or previous scene:
briefly press the 9or: button.
X To select ascene from the scene list
(rapid scrolling): press and hold the
9 or: buttonuntil the desired
scene has been reached. 238
Menus and submenusOn-board computer and displays

Settings menu
Introduction The
Settings menu can be used for:
R changing the instrument cluster settings
R changing the time/date settings 24
R changing the light settings
R changing the vehicle settings
R changing the auxiliary heating settings
R changing the convenience settings
R restoring the factory settings
Instrument cluster Selecting the unit of measurement for dis-
tance
The
Display unit Speed-/odometer: function allows you to choose whether cer-
tain displays appear in kilometres or miles.
The selected unit of measurement for dis-
tance applies to:
R digital speedometers in the Trip menu
R total distance recorder and the trip meter
R trip computer
R current consumption and the range
R navigation instructions in the Navi menu
R cruise control
R SPEEDTRONIC
R DISTRONIC PLUS
R ASSYST PLUS service interval display
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Inst. cluster submenu.X
Press the abutton to confirm.
X Press the :or9 button to select the
Display unit Speed-/odometer func-
tion.
You will see the selected setting: km or
miles .
X Press the abutton to save the setting.
Switching the additional speedometer
on/off
Only vehicles with manual transmission have
this function.
i Vehicles for the United Kingdom: this
function is not available.
The Dig. speedom [mph]: function allows
you to choose whether the status area in the
multifunction display always shows the speed
in mph instead of the outside temperature.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Inst. cluster submenu.
X Press the abutton to confirm.
X Press :or9 to select the Dig. speedo [mph]: function.
You will see the selected setting: on or
off .
X Press the abutton to save the setting.
Selecting the permanent display function
Only vehicles with automatic transmission
have this function.
i Vehicles for the United Kingdom: this
function is not available.
The Permanent display: function allows
you to choose whether the multifunction dis-
play always shows the outside temperature
or the speed in mph.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Inst. cluster submenu.
24 This function is not available on vehicles with Audio 50 APS, Audio 55 APS or COMAND APS. Menus and submenus
243On-board computer and displays Z

X
Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press the abutton to confirm.
X Press the :or9 button to select the
Auto. door lock function.
When the Auto. door locks function is
activated, the vehicle doors are displayed
in red in the multifunction display.
X Press the abutton to save the setting.
Activating/deactivating the acoustic
locking confirmation
If you activate the Acoustic Lock function,
an audible signal sounds depending on the
vehicle's date of manufacture:
R when locking
or
R once when unlocking and three times when
locking
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press the abutton to confirm.
X Press the :or9 button to select the
Acoustic Lock function.
If the Acoustic Lock function is activated,
the & symbol in the multifunction dis-
play lights up red.
X Press the abutton to save the setting.
Activating/deactivating the radar sensor
system
i You must deactivate the radar sensor sys-
tem in certain countries and near radio
telescope facilities. For further informa-
tion, see (Y page 398).
Vehicles with a navigation system: the radar
sensor system is deactivated automatically if
you are close to radio telescope facilities. The following systems are switched off when
the radar sensor system is deactivated:
R
DISTRONIC PLUS (Y page 185)
R BAS PLUS (Y page 70)
R PRE-SAFE ®
Brake (Y page 75)
R Blind Spot Assist (Y page 212)
R Active Blind Spot Assist (Y page 216)
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press the abutton to confirm.
X Press the 9or: button to select
Radar sensor (See Owner's Man.): .
You will see the selected setting: on or
off .
X Press the abutton to save the setting.
Heating menu Auxiliary heating departure time
This function is only available on vehicles with
auxiliary heating (Y
page 145).
In the Heating submenu, you can select a
stored departure time or change a departure
time.
The auxiliary heating timer function calcu-
lates the switch-on time according to the out-
side temperature so that the vehicle is pre-
heated by the departure time. When the
departure time is reached, the auxiliary heat-
ing continues to heat for a further five
minutes and then switches off. The auxiliary
heating adopts the THERMATIC or
THERMOTRONIC temperature setting.
You can switch off the auxiliary heating by
using the remote control or the auxiliary heat-
ing button on the centre console. G
WARNING
Exhaust fumes are produced when the auxili-
ary heating is in operation. Inhaling these
exhaust fumes can be poisonous. You should
therefore switch off the auxiliary heating in Menus and submenus
247On-board computer and displays
Z

confined spaces withou
tanextraction sys-
tem, e.g. a garage. G
WARNING
Whe noperating the auxiliary heating parts of
the vehicle can get very hot. Make sure that
the exhaust system does not under any cir-
cumstances come into contact with easily
ignitable material such as dry grass or fuels.
The material could otherwise ignite and set
the vehicle alight. Choose your parking spot
accordingly.
Operating the auxiliary heating is thus pro-
hibited at filling stations or when your vehicle
is being refuelled. You must therefore switch
off the auxiliary heating at filling stations.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for a longer
distance.
i Switch the auxiliary heating on regularly
once a month for about ten minutes.
Selecting the departure time or deactivat-
ing a selected departure time
X Press the =or; buttononthe steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Heating submenu.
X Press the abutton to confirm.
You will see the selected setting.
X Press the abutton to confirm.
X Press the :or9 button to select
one of the three departure times or Timeroff (no timer active).
X Press the abutton to confirm.
When a departure time is selected, the yel-
low indicator lamp lights up on the auxiliary
heating button. Changing the departure time
X
Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Heating submenu.
X Press the abutton to confirm.
You will see the selected setting.
X Press the abutton to confirm.
X Press the :or9 button to select
Change A ,
B or
C .
X Press the abutton to confirm.
You can now change the departure time.
X Press the =or; button to select the
display to be changed: hours, minutes.
X Press the :or9 button to set the
selected display.
X Press the abutton to store the entry.
The yellow indicator lamp on the auxiliary
heating button lights up.
Convenience Activating/deactivating the EASY-
ENTRY/EXIT feature
You can use the
Easy Entry/Exit: function
to activate or deactivate the EASY ENTRY/
EXIT feature (Y page 115). G
WARNING
The steering wheel moves when the EASY-
ENTRY/EXIT feature is active. There is a risk
of occupants becoming trapped. Before acti-
vating the EASY-ENTRY/EXIT feature, make
sure that nobody can become trapped.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system. The children could open the
driver's door and thereby unintentionally acti-
vate the EASY-ENTRY/EXIT feature and
become trapped.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Convenience submenu.248
Menus and submenusOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
# The battery is no
tbeing charged.
Aw arning tone also sounds.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronics
X Stop the vehicle immediately, paying attentio ntoroad and traf-
fic conditions, and switch off the engine.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X Visit a qualified specialist workshop. 4
Check eng. oil
lev. when next
refuelling The engine oil level has dropped to the minimum level.
Aw
arning tone also sounds.
X Chec kthe oil level when next refuelling, at the latest
(Y page 322).
X If necessary, top up the engine oil (Y page 323).
X Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual. 8
Reserve fuel level The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated when the fuel level
drops into the reserve range.
X
Refuel at the nearest filling station. C There is only a very small amount of fuel in the fuel tank.
The auxiliary heating cannot be operated.
X
Refuel at the nearest filling station without fail. ¸
Replace
air cleaner Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X
Visit a qualified specialist workshop. 264
Display messagesOn-board computer and displays

Vehicle
Display messages Possible causes/consequences and
M Solutions
To start engine,
shift to either P
or N You have attempted to start the engine with the transmission in
position
Ror D.
X Shift the transmission to position Por N. P
Select Park (P) Vehicles with automatic transmission with a selector lever:
You have switched off the engine with the Start/Stop button and
opened the driver's door.
You wanted to lock the vehicle.
Aw arning tone also sounds.
or
You have switched off the engine with the Start/Stop butto nand
opened the driver's door with the transmission in position N.
X Shift the transmission to position P. Vehicles with automatic transmission with a selecto
rlever:
While the HOLD function or DISTRONIC PLUS is active, you have:
R opened the driver's door and released the seat belt or
R switched off the engine or
R opened the bonnet
At one may also sound at regular intervals. The tone becomes
louder if you attempt to lock the vehicle.
You cannot start the engine.
X Shift the transmission to position P.
You can restart the engine. Auxiliary battery
malfunction The auxiliary battery for the automatic transmission is no longer
being charged.
X
Visit a qualified specialist workshop. Apply brake to
deselect Park (P)
position You have attempted to move the transmission selector lever to
position D,Ror Nwithout depressing the brake pedal.
X Depress the brake pedal. Vehicle
not in position P Vehicles with DIRECT SELECT lever:
The driver's door is open and the transmission is in position
R,N
or D.
Aw arning tone also sounds.
X Shift the transmission to position P.
X Apply the parking brake. Display messages
275On-board computer and displays Z