MERCEDES-BENZ R500 2006 W251 Owner's Manual

460 Practical hintsUnlocking / locking in an emergencyUnlocking the driver’s door
1Unlocking
2Mechanical key
Insert mechanical key 2 into the
driver’s door lock until it stops.

Turn mechanical key 2 counterclock-
wise to position1 and hold it there.

Pull the door handle until the locking
knob moves up.
The driver’s door is unlocked.

Pull the door handle once more to open
the driver’s door.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or KEYLESS-GO*, lock the vehi-
cle carrying out the following steps.
Close the front passenger door, the
rear right door and the tailgate.

Open the driver’s door and the rear left
door.

Press the central locking switch on the
driver’s door (
page 131).
The locking knobs of the front passen-
ger door and the rear doors move
down.
If the vehicle battery is disconnected or
drained:

Press down the locking knobs of
the front passenger door and the
rear doors manually.

Exit the vehicle.

Close the driver’s door.

Enter the vehicle through the rear left
door.

Press down the locking knob of the
driver’s door.

Exit the vehicle.

Close the rear left door.
The vehicle is locked.!To prevent inadvertent lockout, make
sure to have the SmartKey or SmartKey
with KEYLESS-GO* with you before
proceeding with the next step. The next
step will lock the vehicle.

461 Practical hints
Unlocking / locking in an emergency
Fuel filler flap
Open the tailgate (
page 122).
The fuel filler flap release is located behind
a cover in the right side trim panel of the
cargo compartment.
1Lock
2Cover

Insert a suitable object such as a coin
into the slot of lock1.

Turn lock1 counterclockwise by 90°
in direction of arrow.

Remove cover2.
3Fuel filler flap release

Pull red fuel filler flap release 3 in di-
rection of arrow.
The fuel filler flap is unlocked.

Open the fuel filler flap (
page 342).
iThe fuel filler flap release may differ,
depending on production date. If your
vehicle is not equipped with the fuel
filler flap release as illustrated, pulling a
red fabric cord instead unlocks the fuel
filler flap.

462 Practical hintsOpening / closing in an emergencyPower tilt/sliding sunroof*
You can open or close the tilt/sliding
sunroof manually should an electrical
malfunction occur.
The tilt/sliding sunroof drive is located
behind a cover on the overhead control
panel.
1Cover
Remove the SmartKey from the starter
switch.Vehicles with KEYLESS-GO*:

Turn off the engine by pressing the
KEYLESS-GO start/stop button
(page 66).

Open the driver’s door (this puts
the starter switch to position0,
same as with the SmartKey re-
moved from starter switch). The
driver’s door can then be closed
again.

Press on cover1 at the position indi-
cated by the arrow.

Take off cover 1.
2Crank

Take crank 2 out of the Operator’s
Manual pouch.

Insert crank2 into hole.

Turn crank2 clockwise to

slide sunroof closed


raise sunroof at the rear

Turn crank2 counterclockwise to

slide sunroof open


lower sunroof at the rear
iTurn crank2 slowly and smoothly.
The tilt/sliding sunroof must be syn-
chronized if it has been operated man-
ually (
page 258).
iThe panorama roof with power
tilt/sliding panel* cannot be operated
as described. Contact an authorized
Mercedes-Benz Light Truck Center.

463 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized Mercedes-Benz Light Truck Center.
Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
SmartKey
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key1 from the
SmartKey (
page 459).
1Mechanical key
2Slide
3Battery compartment

Insert mechanical key 1 in side open-
ing in direction of arrow.

Using mechanical key 1, push gray
slide 2 to unlatch battery compart-
ment 3.
Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen replacing batteries, make sure
they are clean and free of lint.iWhen replacing batteries, always
replace both batteries. The required re-
placement batteries are available at
any Mercedes-Benz Light Truck Center.


464 Practical hintsReplacing SmartKey batteries
Pull battery compartment3out of the
housing in direction of arrow.

Remove the batteries in direction of ar-
row.
4Battery
5Contact spring

Using a lint-free cloth, insert new bat-
teries 4 under contact spring 5 with
the positive terminal (+) facing up.

Return battery compartment 3 into
housing until it locks into place.

Slide mechanical key 1 back into
SmartKey.

Check the operation of the SmartKey.
SmartKey with KEYLESS-GO*
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key1 from the
SmartKey with KEYLESS-GO
(page 459).
1Mechanical key
2Battery compartment

Insert mechanical key 1 into opening.

Press mechanical key 1 in direction of
arrow.
The battery compartment is unlatched.

Pull battery compartment 2 out of the
SmartKey housing.
3Batteries
4Contact spring

Pull out batteries4.

Using a line-free cloth, insert new bat-
teries 4 under contact springs 3 with
the positive terminal (+) side facing up.

Return battery compartment 2 into
housing until it locks into place.

Slide mechanical key 1 back into
SmartKey.

Check the operation of the SmartKey.


465 Practical hints
Replacing bulbs
Replacing bulbs
Bulbs
Safe vehicle operation depends on proper
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp as-
semblies 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 humidity, driving the vehicle a dis-
tance with the lights on should clear up
the fogging.
iBackup 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 442).

466 Practical hintsReplacing bulbsFront lamps Rear lamps
Lamp
Type
1
Parking/standing lamp
W 5 W
2
Turn signal lamp
PY 21 W
3
Additional turn signal
lamp
LED
4
Headlamps:
Low beam
H7 (55W)
Bi-Xenon headlamps*:
Low beam
1
1Vehicles with Bi-Xenon* headlamps: Do not
replace the Bi-Xenon bulbs yourself. Contact an
authorized Mercedes-Benz Light Truck Center.
D2S-35 W
5
Headlamps:
High beam/high beam
flasher
H7 (55W)
Bi-Xenon headlamps*:
High beam/high beam
flasher spot lamp
H7 (55W)
6
Sidemarker lamp
WY 5 W
7
Corner-illuminating
front fog lamp*
H11 (55W)
Lamp
Type
8
High-mounted brake
lamp
LED
9
Tail, brake, and
sidemarker lamp
P 21 W
a
Turn signal lamp
PY 21 W
b
Backup lamp
P 21 W
c
Rear fog lamp (driver’s
side only)
P 21 W
d
License plate lamps
C 5 W

467 Practical hints
Replacing bulbs
Notes on bulb replacement

Only use 12-volt bulbs of the same type
and with the specified watt rating.


Switch the lights off before changing a
bulb to prevent short circuits.


Always use a clean lint-free cloth when
handling bulbs.


Your hands should be dry and free of oil
and grease.


If the newly installed bulb does not
come on, visit an authorized
Mercedes-Benz Light Truck Center.Have the LEDs and bulbs for the following
lamps replaced by an authorized
Mercedes-Benz Light Truck Center:


the additional turn signal lamps in the
exterior rear view mirrors


the high mounted brake lamp


the Bi-Xenon* low beam lamps


the Bi-Xenon high beam flasher spot-
light*


the front sidemarker lamps
Warning!
G
Bulbs and bulb sockets can be very hot.
Allow the lamp to cool down before chang-
ing a bulb.
Keep bulbs out of reach of children.
Halogen lamps contain pressurized gas.
A bulb can explode if you:

touch or move it when hot


drop the bulb


scratch the bulb
Wear eye and hand protection.
Because of high voltage in Xenon lamps, it is
dangerous to replace the bulb or repair the
lamp and its components. We recommend
that you have such work done by a qualified
technician.

468 Practical hintsReplacing bulbsReplacing 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 147).

Open the hood (
page 345).
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 engag-
es.

469 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 engag-
es.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