Page 147 of 299

Lighting145Reading lights
Operated by pressing s and t in
front and rear courtesy lights.
Sunvisor lights
Illuminates when the cover is opened.
Lighting features
Centre console lighting Spotlight incorporated in the interior
lighting comes on when headlights
are switched on.
Entry lighting
Welcome lighting
Headlights, tail lights, number plate
lights, instrument panel light, interior
lights and the light pipes in doors and
FlexConsole are switched on for a
short time by unlocking the vehicle
with the radio remote control. This
function works only in the dark and
facilitates locating the vehicle.
The lighting switches off immediately
when the ignition key is turned to
position 1 3 157.
Activation or deactivation of this
function can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 129.
The settings can be saved for the key being used 3 23.The following lights will additionally
switch on when the driver's door is opened:
■ all switches
■ Driver Information Centre
■ door pocket lights
Exit lighting The following lights switch on if the
key is removed from the ignition
switch:
■ interior lights
■ instrument panel light (only when it is dark)
■ light pipes in doors and FlexConsole
■ number plate lights (puddle lights)
They will switch off automatically after
a delay and will be activated again if
the driver's door is opened.
Headlights, tail lights and number
plate lights illuminate the surrounding area for an adjustable time after
leaving the vehicle.
Page 148 of 299
146Lighting
Switching on
1. Switch off ignition.
2. Remove ignition key.
3. Open driver's door.
4. Pull turn signal lever.
5. Close driver's door.
If the driver's door is not closed, the
lights switch off after two minutes.
Exit lighting is switched off
immediately if the turn signal lever is pulled while the driver's door is open.
Activation, deactivation and duration
of this function can be changed in the Settings menu in the Info-Display.
Vehicle personalisation 3 129.
The settings can be saved for the key being used 3 23.
Battery discharge
protection
To prevent discharge of the vehicle
battery when the ignition is switched
off, some interior lights are switched
off automatically after some time.
Page 172 of 299

170Driving and operatingCaution
It is not advisable to drive with thehand resting on the selector lever.
Brakes
The brake system comprises two independent brake circuits.
If a brake circuit fails, the vehicle can
still be braked using the other brake
circuit. However, braking effect is
achieved only when the brake pedal
is depressed firmly. Considerably
more force is needed for this. The
braking distance is extended. Seek the assistance of a workshop before
continuing your journey.
When the engine is not running, the
support of the brake servo unit
disappears once the brake pedal has been depressed once or twice.
Braking effect is not reduced, but
braking requires significantly greater
force. It is especially important to bear
this in mind when being towed.
Control indicator R 3 112.
Antilock brake system
Antilock brake system (ABS)
prevents the wheels from locking.ABS starts to regulate brake pressure as soon as a wheel shows a tendency to lock. The vehicle remains
steerable, even during hard braking.
ABS control is made apparent
through a pulse in the brake pedal
and the noise of the regulation
process.
For optimum braking, keep the brake
pedal fully depressed throughout the
braking process, despite the fact that
the pedal is pulsating. Do not reduce
the pressure on the pedal.
After starting off the system performs
a self-test which may be audible.
Control indicator u 3 113.
Adaptive brake light During full braking, all three brake
lights flash for the duration of ABS
control.
Page 181 of 299

Driving and operating179
The limited speed will flash in the
Driver Information Centre and a
chime sounds during this period.
Release the accelerator pedal and the speed limiter function is
reactivated once a speed lower than
the limit speed is obtained.
Deactivation
Press y: speed limiter is deactivated
and the vehicle can be driven without
speed limit.
The limited speed is stored and a
corresponding message appears in
the Driver Information Centre.
Resume limit speed
Turn thumb wheel to RES/+. The
stored speed limit will be obtained.
Switching off
Press L, the speed limit indication in
the Driver Information Centre extinguishes. The stored speed is
deleted.By pressing m to activate cruise
control or adaptive cruise control or
by switching off the ignition, speed limiter is also deactivated and the
stored speed is deleted.
Adaptive cruise control
Adaptive cruise control is an
enhancement to traditional cruise
control with the additional feature of maintaining a certain distance behind the vehicle ahead.
Adaptive cruise control automatically decelerates the vehicle when
approaching a slower moving vehicle. It then adjusts the vehicle speed to
follow the vehicle ahead at the
selected following distance. The
vehicle speed increases or decreases
to follow the vehicle in front, but will
not exceed the set speed. It may
apply limited braking with activated
brake lights.
The adaptive cruise control can store and maintain speeds over approx.
30 mph and brakes automatically tofollow a slower vehicle driving ahead
down to a minimum speed of
18 mph.
Adaptive cruise control uses a radar
sensor to detect the vehicles ahead.
If no vehicle is detected in the driving
path, the adaptive cruise control will
behave like a traditional cruise
control.
For safety reasons, the system
cannot be activated before the brake
pedal has been depressed once after
switching on ignition. Activation in first gear is not possible.
Adaptive cruise control is mainly
advised to be used on long straight
roads, e.g. highways or country roads
with steady traffic. Do not use the
system if it is not advisable to
maintain a constant speed.
Control indicator A 3 116, m 3 116.
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Driving and operating201
Trajectory lane of the vehicle is
shown in accordance with the
steering angle.
The function can be deactivated in the
Settings menu in the Info-Display.
Vehicle personalisation 3 129.
Warning symbols
Warning symbols are indicated as
triangles 9 on the picture which
shows obstacles detected by the rear sensors of the advanced parking
assist.
Display settings
Navi 650 /Navi 950 : Brightness can be
set with the up/down buttons of the
multifunction knob.
CD 600 : Brightness can be set by first
pressing and then turning the
multifunction knob.
Deactivation
The camera is deactivated when a
certain forward speed is exceeded or
if reverse gear is not engaged for
approx. 10 seconds.
Activation or deactivation of the rear
view camera can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 129.
Fault
Fault messages are displayed with a
9 on the top line of the Info-Display.
The rear view camera may not
operate properly when:
■ The surrounding area is dark.
■ The sun or the beam of headlights is shining directly into the camera
lens.
■ Ice, snow, mud, or anything else covers the camera lens. Clean the
lens, rinse it with water, and wipe it
with a soft cloth.
■ The tailgate is not closed correctly.
■ The vehicle had a rear-end accident.
■ There are extreme temperature changes.
Page 210 of 299

208Driving and operating
Fill the tank completely at regular
intervals to prevent corrosion in the
tank.
Faults and remedies
If gas mode is not possible, check the following:
■ Is there enough liquid gas present?
■ Is there enough petrol present for starting?
Due to extreme temperatures in
combination with the gas
composition, it may take slightly
longer before the system switches
from petrol to gas mode.
In extreme situations, the system may
also switch back to petrol mode if the
minimum requirements are not
fulfilled.
Seek the assistance of a workshop in the event of all other faults.Caution
Repairs and adjustments may onlybe made by trained specialists in
order to maintain the safety and
warranty on the LPG system.
Liquid gas is given a particular odour
(odorised) so that any leaks can be
detected easily.
9 Warning
If you smell gas in the vehicle or in
the immediate vicinity, switch to petrol mode immediately. No
smoking. No naked flames or
ignition sources.
If the gas odour persists, do not start
the engine. Have the cause of the
fault remedied by a workshop.
When using underground car parks,
follow the instructions of the operator
and local laws.
Notice
In the event of an accident, switch off
the ignition and lights.
Fuel for natural gas
operation Use natural gas with a methane
content of approx. 78 - 99 %. L-gas
(low) has approx. 78 - 87 % and H-gas (high) has approx. 87 - 99 %. Biogas
with the same methane content can
also be used if it has been chemically
prepared and desulphurised.
Only use natural gas or biogas that complies with DIN 51624.
Liquid gas or LPG must not be used.
Fuel selector
Page 224 of 299

222Vehicle care9Danger
The ignition system and Xenon
headlights use extremely high
voltage. Do not touch.
Bonnet
Opening
Pull the release lever and return it to
its original position.
Move the safety catch sideways to the left vehicle side and open the bonnet.
The bonnet is held open
automatically by a lifter.
If the bonnet is opened during an
Autostop, the engine will be restarted automatically for safety reasons.
Closing
Before closing the bonnet, press the
support into the holder.
Lower the bonnet and allow it to fall
into the latch from a low height
(20-25 cm). Check that the bonnet is
engaged.
Caution
Do not press the bonnet into the
latch, to avoid dents.
Engine oil
Check the engine oil level manuallyon a regular basis to prevent damage
to the engine. Ensure that the correct specification of oil is used.
Recommended fluids and lubricants
3 268.
Check with the vehicle on a level
surface. The engine must be at
operating temperature and switched
off for at least 5 minutes.
Pull out the dipstick, wipe it clean,
insert it to the stop on the handle, pull
out and read the engine oil level.
Caution
It is the owner's responsibility to
maintain the proper level of an
appropriate quality oil in the
engine.
Page 231 of 299
Vehicle care229Bulb replacement
Switch off the ignition and switch off
the relevant switch or close the doors.
Only hold a new bulb at the base. Do
not touch the bulb glass with bare
hands.
Use only the same bulb type for
replacement.
Replace headlight bulbs from within
the engine compartment.
Halogen headlightsBi-Halogen headlight (1) with one
bulb for low and high beam.
Front turn signal (2) .
Sidelight/Daytime running light (3) .
Low/High beam (1) 1. Rotate the cap (1) anticlockwise and remove it.
2. Rotate the bulb holder anticlockwise to disengage.
Withdraw the bulb holder from the
reflector.
3. Disengage the bulb holder from the plug connector by pressing
the retaining lug.
4. Replace the bulb and connect bulb holder to the plug connector.
5. Insert the bulb holder, engaging the two lugs into the reflector androtate clockwise to secure.
6. Fit the cap and rotate clockwise.