
Problems with the key/remote control
Problem
Possible causes/consequences and
0050
0050Solutions It is no longer possible
to lock the vehicle
using the remote con-
trol.
The turn signals do not
flash when the vehicle
is locked. The doors are not closed properly.
X Close the doors properly and lock the vehicle again. The central locking system has malfunctioned.
X Lock the vehicle using the folding key (Y page 66).
X Have the central locking system checked as soon as possible at
a qualified specialist workshop. It is no longer possible
to lock or unlock the
vehicle using the
remote control. The key battery is weak or discharged.
X Point the remote control at the driver's door handle from very
close range and press the 0036or0037 button.
If this does not work:
X Replace the key battery (Y page 69).
or
X Lock the vehicle using the folding key (Y page 66). The remote control is faulty.
X Lock the vehicle using the folding key (Y page 66).
X Have the key checked at a qualified specialist workshop. The key cannot be
turned in the ignition
lock. The steering lock has jammed mechanically.
X Remove the key and insert it again into the ignition lock. Turn the
steering wheel from side to side while doing so. The engine cannot be
started using the key. The on-board voltage is too low.
X Switch off all non-essential consumers, such as interior lighting,
and try to start the engine again.
If this does not work: X Check the starter battery and charge it if necessary
(Y page 263).
or
X Jump-start the vehicle (Y page 276).
or
X Consult a qualified specialist workshop. You have lost a key. X
Have the key deactivated at a qualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the mechanical locks replaced. 70
KeyOpening and closing

Useful information
This Operator's Manual describes all models
as well as standard and optional equipment of your vehicle that were available at the time of going to print. Country-specific variations are
possible. Note that your vehicle may not be
equipped with all of the described functions.
This also applies to systems and functions
relevant to safety.
Read the information on qualified specialist
workshops (Y page 25). Exterior lighting
Important safety notes
For reasons of safety, we recommend that
you drive with the lights switched on even
during the daytime. There may be differences
in operation due to legal requirements and
voluntary recommendations in some coun-
tries. Bulb failure indicator
The bulb failure indicator is only an aid. You
are responsible for the proper functioning of
the vehicle lighting. Insufficient or non-func-
tioning vehicle lighting puts the operating
safety of the vehicle at risk.
For this reason, check the condition and func-
tion of your vehicle's lighting system and, if
necessary, that of the trailer before each jour- ney.
The bulb failure indicator monitors all of the
exterior lighting lamps, except the perimeter
lamp and the trailer lighting. If a bulb fails,
either the 0049(Ypage 35) indicator lamp
lights up, or you will see a corresponding
message in the display (Y page 208).
i Depending on the equipment, the bulb
failure indicator can fail for all lamps with
the exception of the turn signal lamps. Light switch
Operation 0047
0058
Automatic headlamp mode/
daytime running lamps
0048 003F
Lights off
0049 0060
Parking lamps, license plate and
instrument lighting
004A 0058
Low-beam/high-beam headlamps
004B 005A
Fog lamps
004C 005E
Rear fog lamp
If you hear a warning tone when you leave the
vehicle, the lights may still be switched on.
X Turn the light switch to 003For0058.
or
X If the rear fog lamp is switched on: press
the light switch in to the stop.
The turn signals, high-beam headlamps and
the high-beam flasher are operated using the combination switch (Y page 94).
Low-beam headlamps X
To switch on: turn the key to position 2in
the ignition lock or start the engine.
X Turn the light switch to position 0058.
The 0058 indicator lamp in the instrument
cluster lights up.
Daytime running lamps You can activate/deactivate the daytime run-
ning lamps function using the on-board com-
puter. 92
Exterior lightingLights and windshield wipers

i
If your vehicle is only equipped with one
rear fog lamp, you must turn the light
switch to 0058.
i When the light switch is set to
0058, you
cannot switch on the front or rear fog
lamps.
X To switch on the front fog lamps: pull the
light switch out to the first locking point.
The green 005Aindicator lamp on the light
switch lights up.
X To switch on the rear fog lamp: pull the
light switch out to the second locking point.
The yellow 005Eindicator lamp on the light
switch lights up.
X To switch off the front fog lamps/rear
fog lamp: push in the light switch to the
stop.
The 005E and005A indicator lamp on the
light switch go out. Combination switch
Turn signal lamps 0043
To indicate a right turn
0044 To indicate a left turn X
To indicate: press the combination switch
in desired direction 0043or0044 until it
engages.
The combination switch automatically
returns to its original position after large
steering movements.
X To indicate briefly: press the combination
switch briefly in desired direction 0043or0044.
The corresponding turn signal flashes three
times.
High-beam headlamps and high-beam
flasher 0043
High-beam headlamps
0044 High-beam flasher
X To switch on the high-beam headlamps:
switch on the low-beam headlamps
(Y page 92).
X Press combination switch 0043forwards.
The 0057 indicator lamp in the instrument
cluster lights up.
i In the
0058position, the high-beam head-
lamps are only switched on when it is dark
and the engine is running.
X To switch off the high-beam headlamps:
move the combination switch back to its
normal position.
The 0057 indicator lamp in the instrument
cluster goes out.
X To switch on the high-beam flasher: turn
the key to position 1or 2in the ignition
lock.
X Pull the combination switch briefly in direc-
tion of arrow 0044.94
Exterior lightingLights and windshield wipers

Cornering lamps
The cornering lamps improve the illumination of the road over a wide angle in the direction
you are turning, enabling better visibility in
tight bends, for example.
The cornering light function switches on
automatically, if:
R you are traveling at a speed of less than
25 mph (40 km/h) and you switch on a turn signal or turn the steering wheel.
R you are traveling at a speed between
25 mph (40 km/ h)and 43 mph (70 km/h)
and turn the steering wheel.
The cornering lamp may remain lit for a short
time, but is automatically switched off after
no more than 3 minutes.
i If reverse gear is engaged the lamp on the
opposite side of the vehicle switches on
instead. Hazard warning lamps
G
WARNING
The rear exterior light will be covered if you:
R open the rear doors by 90°
R open the rear dropside.
The vehicle will then be difficult for other road users to see or will not be seen by them at all,
particularly if it is dark or visibility is poor.
There is a risk of an accident.
You should therefore ensure in this and simi-
lar situations that the vehicle is visible from
the rear in accordance with the relevant
national regulations, by using the warning tri- angle, for instance. Hazard warning lamp switch
X
To switch on/off: press the002Fhazard
warning lamp switch.
If you have indicated a turn while the hazard
warning lamps are switched on, only the turn signal lamps on the side of the vehicle selec- ted will light up.
The hazard warning lamps switch on auto-
matically if:
R an air bag is deployed.
R you brake sharply and bring the vehicle to a
halt from a speed of more than 45 mph
(70 km/h).
If the hazard warning lamps have been
switched on automatically, press the 002F
hazard warning lamp switch to switch them
off.
i The hazard warning lamps work even
when the ignition is switched off. Headlamp cleaning system
The headlamps are cleaned automatically
with a high-pressure water jet if the "Wipe
with washer fluid" function is activated
(Y page 107) while the low-beam headlamps
are on and the engine is running.
You can find information on refilling washer
fluid in the "Maintenance and care" section
(Y page 255). Exterior lighting
95Lights and windshield wipers Z

R
Do not use a bulb that has been dropped or
that has scratches on its glass tube.
The bulb could explode.
R Only use bulbs in closed lamps which have
been designed for this purpose.
R Only use spare bulbs of the same type and
with the prescribed voltage
R Protect the bulbs from moisture when in
use.
If the new bulb still does not light up, consult a qualified specialist workshop.
R Have the LEDs and bulbs of the following
lamps changed at a qualified specialist
workshop:
- the additional turn signals in the exterior
mirrors
- the high-mounted brake lamp
- LED daytime running lamps (Bi-Xenon
headlamps)
- Bi-Xenon lamps (Bi-Xenon headlamps)
- front fog lamps
If you require assistance changing bulbs, con-
sult a qualified specialist workshop. Front bulbs
Overview of bulb replacement – bulb
types The following bulbs can be replaced. Bulb
types can be found in the legend. Vehicles with halogen headlamps
0043
Turn signal: PY21W
0044 Daytime running lamps: W21W 0087
Low-beam headlamps: H7 55W
0085 High-beam headlamps: H7 55W
0083 Parking lamps/standing lamps: W5W Vehicles with Bi-Xenon headlamps
0043
Turn-signal: NAK 3457
Additional turn signals in the exterior mir-
ror (not for all-wheel-drive vehicles):
HPC 16WY
Low-beam headlamps and high-beam
headlamps/cornering lamp Example (halogen headlamps)
X Switch off the lighting system.
X Open the hood (Y page 248).
X Turn housing cover 0043in the direction of
the arrow and remove it. 100
Changing bulbsLights and
windshield wipers

Turn signal lamps
X
Switch off the lighting system.
X Open the hood (Y page 248).
X Turn bulb holder 0043counter-clockwise and
remove it.
X Applying light pressure to the bulb, turn it
counter-clockwise and remove it from bulb
holder 0043.
X Press the new bulb into bulb holder 0043and
screw it in clockwise.
X Insert bulb holder 0043into the lamp and turn
it clockwise to tighten.
X Close the hood. Rear bulbs (Cargo Van/Passenger
Van)
Overview of bulb types Lights Bulb type
0043
High-mounted brake
lamp LED
0044
Brake lamp/tail lamp P21W/5W
0087
Turn signal lamps PY 21 W
0085
Tail lamps/standing
lamps R5W
0083
License plate lamp W5W
0084
Rear fog lamps (driver's
side) P21W
006B
Backup lamps P21W102
Changing bulbsLights and
windshield wipers

Tail lamps
X
Switch off the lighting system.
X Open the rear door.
X Undo screws 0043and unclip the lamp lens in
the direction of the arrow.
X Pull the connector off the bulb holder. 0044
Retaining lugs
0087 Brake lamps
0085 Turn signal lamps
0083 Standing lamp/tail lamp
0084 Backup lamps
006B Rear fog lamp X
Release retaining lugs 0044and take the bulb
holder out of the tail lamp.
X Applying light pressure to the bulb, turn it
counter-clockwise and remove it from the
bulb holder.
X Press the new bulb into the bulb holder and
screw it in clockwise.
X Press the connector into the bulb holder.
X Insert the lamp lens.
To do this, clip the bulb holder into the three
holes provided at the side and tighten
screws 0043.
License plate lamp X
Switch off the lighting system.
X Insert a screwdriver or similar implement
into recess 0044and carefully pry off lamp
lens 0043.
X Pull the bulb out of the bulb holder.
X Insert a new bulb.
X Align lamp lens 0043and clip it in so that it
engages. Changing bulbs
103Lights andwindshield wipers Z

Rear bulbs (Cab Chassis)
Overview of bulb types Chassis (example: Cab Chassis)
Lights Bulb type
0043
Perimeter lamp/stand-
ing lamp R 5 W
0044
Tail lamps R 5 W
0087
Brake lamps P 21 W
0085
Turn signal lamps PY 21 W
0083
Backup lamps P 21 W
0084
Rear fog lamps (driver's
side) P 21 W
006B
License plate lamp R 5 W
Tail lamps
0043
Screws
0044 Lamp lens
0087 Perimeter lamp/standing lamp
0085 Turn signal lamps 0083
Brake lamps
0084 Tail lamps
006B Rear fog lamp
006C License plate lamp
006D Backup lamps
X Switch off the lighting system.
X Undo screws 0043and remove lamp lens 0044.
X Applying light pressure to the bulb, turn it
counter-clockwise and remove it from the
bulb holder.
X Press the new bulb into the bulb holder and
screw it in clockwise.
X Position lamp lens 0044and tighten
screws 0043. Additional lamps
Additional turn signal lamp on the roof Type of lamp: P 21 W
X
Switch off the lighting system.
X Undo screws 0043and remove lamp lens 0044.
X Applying light pressure to the bulb, turn it
counter-clockwise and remove it from the
bulb holder.
X Press the new bulb into the bulb holder and
screw it in clockwise.
X Position lamp lens 0044and tighten
screws 0043again. 104
Changing bulbsLights and windshield wipers