Page 34 of 229
32Keys, doors and windows
operation, noise or plug the water
drainage system. Periodically open
the sunroof and remove any
obstacles or loose debris. Wipe the
sunroof seal and roof sealing area
using a clean cloth, mild soap, and
water. Do not remove grease from the sunroof.
General hints Safety function
If the sunroof encounters resistance
during automatic closing, it is
immediately stopped and opened
again.
Override safety function
In the event of closing difficulties due to frost or the like, press and hold
switch 2. The sunroof closes without
safety function enabled. To stop
movement, release the switch.
Initialising after a power failure
After a power failure, it may only be
possible to operate the sunroof to a
limited extent. Have the system
initialised by your workshop.
Page 48 of 229

46Seats, restraints
The inflated airbags cushion the
impact, thereby reducing the risk of
injury to the head in the event of a
side-on impact considerably.
9 Warning
Keep the area in which the airbag
inflates clear of obstructions.
The hooks in the roof frame are
only suitable for hanging up light
articles of clothing, without coat
hangers. Do not keep any items in these clothes.
Airbag deactivation
The front passenger airbag system
must be deactivated if a child restraint system is to be fitted on this seat. The
side airbag and curtain airbag
systems, the belt pretensioners and
all driver airbag systems will remain
active.
The front passenger airbag system
can be deactivated via a key-
operated switch on the right side of
the instrument panel.
Use the ignition key to choose theposition:c=front passenger airbags are
deactivated and will not inflate
in the event of a collision.
Control indicator c
illuminates continuously in the
centre console. A child
restraint system can be
installed in accordance with
the chart Child restraint
installation locations 3 49.
No adult person is allowed to
occupy the front passenger
seat.d=front passenger airbags are
active. A child restraint system
must not be installed.9 Danger
Risk of fatal injury for a child using
a child restraint system on a seat
with activated front passenger
airbag.
Risk of fatal injury for an adult
person on a seat with deactivated
front passenger airbag.
Page 90 of 229

88Instruments and controls
Flashes
Fault in system or tyre without
pressure sensor mounted (e.g. spare wheel). After 60-90 seconds the
control indicator illuminates
continuously. Consult a workshop.
Tyre pressure monitor system
3 182.
Engine oil pressure
I illuminates red.
Illuminates when the ignition is
switched on and extinguishes shortly
after the engine starts.
Illuminates when the engine isrunningCaution
Engine lubrication may be
interrupted. This may result in
damage to the engine and/or
locking of the drive wheels.
1. Depress clutch.
2. Select neutral gear, set selector lever to N.
3. Move out of the flow of traffic as quickly as possible without
impeding other vehicles.
4. Switch off ignition.9 Warning
When the engine is off,
considerably more force is needed
to brake and steer. During an
Autostop the brake servo unit will still be operational.
Do not remove key until vehicle is stationary, otherwise the steeringwheel lock could engage
unexpectedly.
Check oil level before seeking the
assistance of a workshop 3 163.
Low fuel
i illuminates or flashes yellow.
Illuminates
Level in fuel tank is too low.
Flashes
Fuel used up. Refuel immediately.
Never run the tank dry.
Catalytic converter 3 127.
Bleeding the diesel fuel system
3 168.
Immobiliser
d flashes yellow.
Fault in the immobiliser system. The
engine cannot be started.
Have the cause of the fault remedied by a repairer.
Exterior light8 illuminates green.
The exterior lights are on 3 104.
High beam
C illuminates blue.
Page 99 of 229

Instruments and controls97Warning chimesWhen starting the engine or
whilst driving ■ If the door or bonnet is open.
■ If seat belt is not fastened.
■ If a certain speed is exceeded with parking brake applied.
■ If a warning message or a warning code appears in the Driver
Information Centre.
■ If the parking assist detects an object.
When the vehicle is parked and/ or the driver's door is opened ■ When the key is in the ignition switch.
■ With exterior lights on.
Battery voltage
When the battery voltage is running
low, a warning message or warning
code 174 will appear in the Driver
Information Centre.1. Switch off immediately any electrical consumers which are
not required for a safe ride, e.g.
seat heating, heated rear window
or other main consumers.
2. Charge the battery by driving continuously for a while or by
using a charging device.
The warning message or warning
code will disappear after the engine
has been started twice consecutively
without a voltage drop.
If the battery cannot be recharged,
have the cause of the fault remedied
by a workshop.Trip computer
The menus and functions can be
selected via the buttons on the turn signal lever 3 90.
Press MENU to select the Trip/Fuel
Information Menu , or select W on
the Uplevel-Combi-Display.
Page 108 of 229
106Lighting
0=front seats occupied1=all seats occupied2=all seats occupied and load
compartment laden3=driver's seat occupied and load
compartment laden
Headlights when driving
abroad The asymmetrical headlight beam
extends visibility at the edge of the
road at the passenger side.
However, when driving in countries
where traffic drives on the opposite
side of the road, adjust the headlights to prevent dazzling of oncoming
traffic.
Vehicles with halogen headlight
system
The adjusting screws are located
above the headlight.
Turn the adjusting screws with the
screwdriver clockwise by half a turn.
For deactivation, turn the adjusting
screws anticlockwise by half a turn.
Caution
Have the adjustment of the
headlights checked after
deactivation.
We recommend consulting a
workshop.
Vehicles with adaptive forward
lighting system
1. Key in ignition switch.
2. Pull turn signal lever and hold (headlight flash).
Page 114 of 229

112LightingReading lights
The front reading lights are located inthe overhead console.
Press s and t to turn each light on
or off.
Glove box lighting
Illuminates when the glovebox is
opened.
Sunvisor lights
Illuminates when the cover is opened.
Lighting features
Entry lighting
Welcome lighting Following lights are switched on for a
short time by unlocking the vehicle
with the radio remote control:
■ low beam
■ sidelights
■ tail lights
■ number plate lights
■ instrument panel light
■ interior lights
This function works only in the dark
and facilitates locating the vehicle.
Activation or deactivation of this
function can be changed in the menu Settings in the Info-Display. Vehicle
personalisation 3 100.
The following lights will additionally
switch on when driver's door is
opened:
■ some switches
■ some interior lightsExit lighting
Low beam, sidelights and tail lights illuminate the surrounding area for an adjustable time after leaving the
vehicle.
Switching on
Activation, deactivation and duration
of lighting of this function can be
changed in the Vehicle Settings.
Vehicle personalisation 3 100.
1. Switch off ignition.
2. Remove ignition key.
3. Open driver's door.
Page 124 of 229

122Driving and operatingStarting and operating
New vehicle running-in Do not brake unnecessarily hard for
the first few journeys.
During the first drive, smoke may
occur because of wax and oil
evaporating off the exhaust system.
Park the vehicle in the open for a
while after the first drive and avoid
inhaling the fumes.
During the running-in period fuel and engine oil consumption may be
higher and the cleaning process of the diesel particle filter may take
place more often. Autostop may be
inhibited to allow for charging the
battery.
Diesel particle filter 3 126.Ignition switch positions0=ignition off1=steering wheel lock released,
ignition off2=ignition on, for diesel engine:
preheating3=startingStarting the engine
Manual transmission: operate clutch.
Automatic transmission: operate
brake and move the selector lever to
P or N.
Do not operate the accelerator pedal. Diesel engine: turn the key to position2 for preheating until control
indicator ! extinguishes.
Turn the key briefly to position 3 and
release: an automatic procedure
operates the starter with a short delay
as long as the engine is running, see
'Automatic Starter Control'.
Page 125 of 229

Driving and operating123
Before restarting or to switch off the
engine, turn the key back to position
0 .
During an Autostop, the engine can
be started by depressing the clutch
pedal.
Key lock release
Some vehicles with an automatic
transmission are equipped with an electronic key lock release system.
The key lock release is designed to
prevent ignition key removal unless
the selector lever is in P.
Starting the vehicle at low
temperatures
Starting the engine without additional
heaters is possible down to -25 °С for diesel engines and -30 °C for petrol
engines. Required is an engine oil
with the correct viscosity, the correct fuel, performed services and a
sufficiently charged battery. With
temperatures below -30 °C the
automatic transmission requires a
warming phase of approx. 5 minutes.
The selector lever must be in position P .Automatic Starter Control
This function controls the engine
starting procedure. The driver does
not need to hold the key in position 3.
Once applied, the system will go on starting automatically until the engine
is running. Because of the checking
procedure, the engine starts running
after a short delay.
Possible reasons for a non-starting
engine:
■ clutch pedal not operated (manual transmission)
■ brake pedal not operated or selector lever not in P or N
(automatic transmission)
■ timeout occurred
Turbo engine warm-up Upon start-up, engine available
torque may be limited for a short time,
especially when the engine
temperature is cold. The limitation is
to allow the lubrication system to fully protect the engine.Overrun cut-off
The fuel supply is automatically cut off
during overrun, i.e. when the vehicle
is driven with a gear engaged but
accelerator is released.
Stop-start system The stop-start system helps to save
fuel and to reduce the exhaust
emissions. When conditions allow, it
switches off the engine as soon as the
vehicle is at a low speed or at a
standstill, e.g. at a traffic light or in a traffic jam. It starts the engine
automatically as soon as the clutch is
depressed. A battery sensor ensures
that an Autostop is only performed if
the battery is sufficiently charged for
a restart.
Activation
The stop-start system is available as soon as the engine is started, the
vehicle starts-off and the conditions
as stated below in this section are
fulfilled.