headlamp MERCEDES-BENZ R320CDI 2007 R171 Owner's Guide

413 Operation
Vehicle care
Ornamental moldings
For regular cleaning and care of ornamen-
tal moldings, use a use damp cloth.Headlamps, brake lamps, tail lamps,
side markers, turn signal lenses
Use a mild car wash detergent, such
as Mercedes-Benz approved Car
Shampoo, with plenty of water.
!If you want the gear position to remain inN
(for example when the vehicle is pulled through
a car wash):

do not remove the SmartKey from the starter
switch
or, when using KEYLESS-GO*

do not turn off the engine using the
KEYLESS-GO start/stop button* and open
the driver’s door
Otherwise, the transmission will shift toP and
lock the wheels, preventing the vehicle from
being pulled through a car wash.
!Make sure that the windshield wiper switch
is set to0 (
page 61). Otherwise, the rain
sensor could activate and cause the wipers to
move unintentionally. This may lead to vehicle
damage.
Due to the width of the vehicle, fold in exterior
rear view mirrors prior to running the vehicle
through an automatic car wash to prevent
damage to the mirrors.
iAfter running the vehicle through an auto-
matic car wash, wipe any wax off of the wind-
shield (
page 415). This will prevent smears
and reduce wiping noise which can be caused by
residual wax on the windshield.
When leaving the car wash, make sure that the
mirrors are folded out. Otherwise they may
vibrate.
!Do not use chrome cleaner on ornamental
moldings. Although ornamental moldings may
have chrome appearance, they could be made of
anodized aluminum that will be damaged when
cleaned with chrome cleaner. Instead, use damp
cloth to clean those ornamental moldings.
Very dirty ornamental moldings of which you are
sure are chrome-plated, use a chrome cleaner.
If in doubt whether an ornamental molding is
chrome-plated, contact an authorized
Mercedes-Benz Light Truck Center.
!Only use window cleaning solutions that are
suitable for plastic lamp lenses. Window clean-
ing solutions which are not suitable may damage
the plastic lamp lenses of the headlamps. There-
fore, do not use abrasives, solvents or cleaners
that contain solvents.
Never apply strong force and only use a soft,
non-scratching cloth when cleaning the lenses.
Do not attempt to wipe dirty lenses with a dry
cloth or sponge.
Otherwise you may scratch or damage the lens
surface.

434 Practical hints
What to do if …
On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may
appear in the multifunction display.
For your convenience the messages are
divided into two sections:

Text messages (page 435)

Symbol messages (page 451)
Warning!G
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such
as speed or outside temperature, warn-
ing/indicator lamps, malfunction/warning
messages or the failure of any systems.
Driving characteristics may be impaired.
If you must continue to drive, do so with
added caution. Contact an authorized
Mercedes-Benz Light Truck Center as soon
as possible.
iSwitching on the ignition causes all
instrument cluster lamps (except high beam
headlamp indicator lamp, and turn signal indica-
tor lamps unless activated) as well as the multi-
function display to come on. Make sure the
lamps and multifunction display are in working
order before starting your journey.

463 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
. 3rd brake lampThe high mounted brake lamp is
malfunctioning. This message
will only appear if all light
emitting diodes have stopped
working.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Active headlamps
inoperativeThe active Bi-Xenon* headlamp
system is malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
AUTO Light
inoperativeThe light sensor is malfunction-
ing. The headlamps do not
switch on automatically.In the control system, set lamp operation
to manual mode (
page 147).
Switch on headlamps using the exterior
lamp switch (
page 146).
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Brake lamp leftThe left brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 484).
Brake lamp rightThe right brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 484).

464 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
. Cornering lamp
LeftThe left corner-illuminating front
fog lamp is malfunctioning.Replace the bulb as soon as possible
(
page 484).
Cornering lamp
RightThe right corner-illuminating
front fog lamp is malfunctioning.Replace the bulb as soon as possible
(
page 484).
Front foglamp
LeftThe left front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 484).
Front foglamp
RightThe right front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 484).
High beam
LeftThe left high beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 484).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
High beam
RightThe right high beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 484).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

465 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
. License plate lamp
LeftThe left license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 484).
License plate lamp
RightThe right license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 484).
Low beam
LeftThe left low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 484).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Low beam
RightThe right low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 484).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

467 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
. Switch off lightsYou have removed the SmartKey
from the starter switch and
opened the driver’s door or
removed the SmartKey with
KEYLESS-GO* from the vehicle
and left the headlamps on.Turn the exterior lamp switch toM
(
page 146).
Switch off lights
or remove keyYou have opened the driver’s
door while the exterior lamp
switch is in position U and
the SmartKey is still in the
starter switch.
The parking lamps are still on.Turn the exterior lamp switch toM
(
page 146).
or
Remove the SmartKey from the starter
switch.
Tail lamp
LeftThe left tail lamp is malfunction-
ing. A substitute bulb is being
used.Replace the bulb as soon as possible
(
page 484).
Tail lamp
RightThe right tail lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 484).

484 Practical hints
Replacing bulbs
Bulbs
Safe vehicle operation depends on proper
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp
assemblies are in good working order at
all times.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. See an authorized
Mercedes-Benz Light Truck Center for
headlamp adjustment.iIf the headlamps or front fog lamps are
fogged up on the inside as a result of high humid-
ity, driving the vehicle a distance with the lights
on should clear up the fogging.iSubstitute bulbs will be brought into use
when the following lamps malfunction:

Turn signal lamps

Brake lamps

Parking lamps

Tail lamps
Read and observe messages in the multifunction
display (
page 463).

485 Practical hints
Replacing bulbs
Front lamps Rear lamps
LampType
1Parking/standing lampW 5 W
2Turn signal lampPY 21 W
3Additional turn signal
lamp
LED
4Headlamps:
Low beam
H7 (55 W)
Bi-Xenon headlamps*:
Low beam1
1Vehicles with Bi-Xenon* headlamps: Do not
replace the Bi-Xenon bulbs yourself. Contact an
authorized Mercedes-Benz Light Truck Center.
D2S-35 W
5Headlamps:
High beam/high beam
flasher
H7 (55 W)
Bi-Xenon headlamps*:
High beam/high beam
flasher spot lamp
H7 (55 W)
6Side marker lampWY 5 W
7Corner-illuminating
front fog lamp*
H11 (55 W)
LampType
8High-mounted brake
lamp
LED
9Tail, brake, and side
marker lamp
P 21 W
aTurn signal lampPY 21 W
bBackup lampP 21 W
cRear fog lamp (driver’s
side only)
P 21 W
dLicense plate lampsC 5 W

487 Practical hints
Replacing bulbs
Replacing bulbs for front lamps
Before you start to replace a bulb for a
front lamp, do the following first:
Turn the exterior lamp switch to
positionM (
page 146).
Open the hood (page 364).
Halogen headlamps
1Low beam/high beam headlamp cover2Bulb socket for turn signal lamp
2Bulb socket for turn signal lamp
3Bulb socket for low beam headlamp
4Bulb socket for high beam headlampLow beam headlamp bulbs
Turn cover 1 counterclockwise.
Remove cover 1.
Turn bulb socket 3 counterclockwise.
Pull bulb socket 3 out of the head-
lamp housing.
Pull the low beam bulb out of bulb
socket 3.
Insert the new low beam bulb into bulb
socket 3.
Insert bulb socket 3 into the head-
lamp housing.
Turn bulb socket 3 clockwise until it
engages.
Place cover 1 on the opening in the
headlamp housing.
Turn cover 1 clockwise until it
engages.

488 Practical hints
Replacing bulbs
High beam headlamp bulbs
Turn cover 1 counterclockwise.
Remove cover 1.
Turn bulb socket 4 counterclockwise.
Pull bulb socket 4 out of the head-
lamp housing.
Pull the high beam bulb out of bulb
socket 4.
Insert the new high beam bulb into bulb
socket 4.
Insert bulb socket 4 into the head-
lamp housing.
Turn bulb socket 4 clockwise until it
engages.
Place cover 1 on the opening in the
headlamp housing.
Turn cover 1 clockwise until it
engages.Front turn signal lamp bulbs
Pull bulb socket 2 out of the head-
lamp housing.
Pull the turn signal bulb out of bulb
socket 2.
Insert the new turn signal bulb into bulb
socket 2.
Insert bulb socket 2 into the head-
lamp housing.Bi-Xenon headlamps*
1Bulb socket for turn signal lamp
2Low beam/high beam headlamp cover
– Do not remove
1Bulb socket for turn signal lamp