Page 128 of 295

126LightingReversing lights
The reversing light comes on when
the ignition is on and reverse gear is
selected.
Misted light covers
The inside of the light housing may
mist up briefly in poor, wet and cold weather conditions, in heavy rain or
after washing. The mist disappears
quickly by itself; to help switch on the
headlights.Interior lighting
Instrument panelillumination control
Brightness of the following lights can
be adjusted when the exterior lights
are on:
● instrument panel illumination
● Info-Display
● illuminated switches and operation elements
Turn thumb wheel A and hold until
the desired brightness is obtained.
On vehicles with light sensor, the
brightness can only be adjusted when
the exterior lights are on and the light sensor detects night conditions.
Interior lights
During entry and exit of the vehicle,
the front and rear courtesy lights
automatically switch on and then off
after a delay.
Note
In the event of an accident with
airbag deployment the courtesy
lights are turned on automatically.
Front courtesy light
Page 129 of 295
Lighting127Operate rocker switch:w:automatic switching on
and offpress u:onpress v:off
Courtesy light on version with
panorama roof
Left and right lamps are separately
switchable.
Operate rocker switches:
centre posi‐
tion:automatic switching
on and offpress I:onpress 0:offRear courtesy lights
Illuminates in conjunction with the
front courtesy light depending on
rocker switch position.
Press s or t to switch on manually.
Reading lights
Operated by pressing s and t in
front and rear courtesy lights.
Sunvisor lights Illuminates when the cover is opened.
Page 130 of 295

128LightingLighting featuresCentre console lighting Spotlight incorporated in the interior
lighting comes on when headlights
are switched on.
Entry lighting
Welcome lighting The following lights are switched on
for a short time by unlocking the
vehicle with the radio remote control:
● headlights
● tail lights
● number plate lights
● instrument panel light
● interior lights
● door and console lights
● puddle lights
Some functions work only in the dark and facilitates locating the vehicle.
The lighting switches off immediately
when the ignition key is turned to
position 1 3 142.Activation or deactivation of this
function can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 106.
The settings can be saved for the key
being used 3 24.
The following lights will additionally
switch on when the driver's door is
opened:
● illumination of some switches
● Driver Information Centre
● door pocket lights
● console 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)
● door lights
● puddle lights
They will switch off automatically after
a delay and will be activated again if
the driver's door is opened.Path lighting
Headlights, tail lights and number
plate lights illuminate the surrounding
area for an adjustable time after
leaving the vehicle.
Activating
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.
Page 131 of 295

Lighting129Exit 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 3 106.
The settings can be saved for the key being used 3 24.
Battery discharge protection Vehicle battery state of charge
function
The function guarantees longest
vehicle battery life via a generator with controllable power output and
optimised power distribution.
To prevent discharge of the vehicle
battery when driving, the following
systems are reduced automatically in
two stages and finally switched off:
● Auxiliary heater
● Heated rear window and mirrors
● Heated seats
● FanIn the second stage a message which confirms the activation of the vehicle
battery discharge protection will be
displayed in the Driver Information Centre.
Switching off electric lights
To prevent discharge of the vehicle
battery when the ignition is switched
off, some interior lights are switched
off automatically after some time.
Page 155 of 295

Driving and operating153Brakes
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 89.
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 90.
Adaptive brake light
During full braking, all three brake
lights flash for the duration of ABS
control.Fault9 Warning
If there is a fault in the ABS, the
wheels may be liable to lock due
to braking that is heavier than
normal. The advantages of ABS are no longer available. During
hard braking, the vehicle can no longer be steered and may
swerve.
Have the cause of the fault remedied
by a workshop.
Page 165 of 295

Driving and operating163
Change speed limit
With speed limiter active, turn thumb
wheel to RES/+ to increase or SET/-
to decrease the desired maximum
speed.
Exceeding the speed limit
In the event of an emergency, it is
possible to exceed the speed limit by
depressing the accelerator pedal
firmly beyond the point of resistance.
The limited speed will flash in the
Driver Information Centre and
(depending on vehicle) additionally 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.
50 km/h and brakes automatically to follow a slower vehicle driving ahead
to a minimum speed of 30 km/h.
Page 202 of 295

200Vehicle careVehicle careGeneral Information...................201
Accessories and vehicle modifications .......................... 201
Vehicle storage ........................201
End-of-life vehicle recovery .....202
Vehicle checks ........................... 202
Performing work ......................202
Bonnet ..................................... 202
Engine oil ................................. 203
Engine coolant ......................... 204
Power steering fluid .................205
Washer fluid ............................ 205
Brakes ..................................... 206
Brake fluid ............................... 206
Vehicle battery ......................... 206
Diesel fuel system bleeding .....208
Wiper blade replacement ........208
Bulb replacement .......................209
Halogen headlights ..................209
Adaptive forward lighting .........212
Fog lights ................................. 213
Front turn lights .......................215
Tail lights ................................. 217
Side turn lights ......................... 220
Number plate light ...................222Interior lights ............................ 222
Instrument panel illumination ...222
Electrical system ........................223
Fuses ....................................... 223
Engine compartment fuse box . 224
Instrument panel fuse box .......226
Load compartment fuse box ....227
Vehicle tools .............................. 228
Tools ........................................ 228
Wheels and tyres .......................230
Winter tyres ............................. 230
Tyre designations ....................230
Tyre pressure .......................... 231
Tyre pressure monitoring system .................................... 232
Tread depth ............................. 235
Changing tyre and wheel size . 235
Wheel covers ........................... 236
Tyre chains .............................. 236
Tyre repair kit .......................... 236
Wheel changing .......................239
Spare wheel ............................ 243
Jump starting ............................. 247
Towing ....................................... 248
Towing the vehicle ...................248
Towing another vehicle ...........249Appearance care .......................250
Exterior care ............................ 250
Interior care ............................. 253
Page 204 of 295
202Vehicle careEnd-of-life vehicle recoveryInformation on end-of-life vehicle
recovery centres and the recycling of
end-of-life vehicles is available on our website, where legally required. Only
entrust this work to an authorised
recycling centre.
Gas vehicles must be recycled by a
service centre authorised for gas
vehicles.Vehicle checks
Performing work9 Warning
Only perform engine compartment
checks when the ignition is off.
The cooling fan may start
operating even if the ignition is off.
9 Danger
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.