2007 MERCEDES-BENZ R350 lock

483 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are
discharged, 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.Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key from the
SmartKey (
page 478).
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 springs
Pull out batteries3.
Using a line-free cloth, insert new bat-
teries 3 under contact springs 4 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
or SmartKey with KEYLESS-GO*.
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 replacement
batteries are available at any Mercedes-Benz
Light Truck Center.

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

489 Practical hints
Replacing bulbs
Low beam and high beam flasher spot
bulbs
Front turn signal lamp bulbs
Pull bulb socket 1 out of the head-
lamp housing.
Pull the turn signal bulb out of bulb
socket 1.
Insert the new turn signal bulb into bulb
socket 1.
Insert bulb socket 1 into the head-
lamp housing.Parking and standing lamp bulbs
1Bulb socket for parking and standing
lamp
Turn bulb socket 1 counterclockwise.
Pull bulb socket 1 out of the housing.
Pull the bulb out of bulb socket 1.
Insert the new parking and standing
lamp bulb into bulb socket 1.
Insert bulb socket 1 into the housing.
Turn bulb socket 1 clockwise until it
engages.Corner-illuminating front fog lamp*
bulbs
Example illustration (except R 63 AMG)
1Corner-illuminating front fog lamp*
2Cover
3Retaining screw
Warning!G
Do not remove the low beam/high beam
cover for the Bi-Xenon* headlamp. Because
of high voltage in Bi-Xenon* lamps, it is dan-
gerous to replace the bulb or repair the lamp
and its components. We recommend that
you have such work done by a qualified
technician.

491 Practical hints
Replacing bulbs
Turn bulb socket 5 counterclockwise.
Pull bulb socket 5 out of the housing.
Pull the bulb out of bulb socket 5.
Insert the new corner-illuminating front
fog lamp bulb into bulb socket 5.
Insert bulb socket 5 into the housing.
Turn bulb socket 5 clockwise until it
engages.
Insert corner-illuminating front fog
lamp 1 back into bumper.
Fasten retaining screws4.
Reinsert cover 2 and press it in until it
engages.
Fasten retaining screw(s)3.Additional turn signal lamps bulbs
The additional turn signal lamps in the
exterior rear view mirrors have LEDs.
If a malfunction occurs or LEDs fail to
function, the entire turn signal unit must
be replaced. Have the turn signal unit re-
placed by an authorized Mercedes-Benz
Light Truck Center.
Front side marker lamp bulbs
Since replacing the side marker lamp bulbs
is a technically highly demanding process,
we recommend you have the side marker
lamp bulbs replaced by an authorized
Mercedes-Benz Light Truck Center.
Replacing bulbs for rear lamps
Before you start to replace a bulb for a rear
lamp, do the following first:
Turn the combination switch to
positionM (
page 146).
Tail lamp unit
Open the tailgate (page 123).
iTo access the tail lamp units, you have to
remove the cover in the corresponding side trim
panel of the cargo compartment.

492 Practical hints
Replacing bulbs
Opening the side trim panels
1Lock
2Cover in left side trim panel
1Lock
2Cover in right side trim panelInsert a suitable object such as a coin
into the slot of lock1.
Turn lock1 clockwise (left side trim
panel) or counterclockwise (right side
trim panel) by 90° in direction of arrow.
Remove cover2.
Replacing bulbs
1Tail, side marker, standing, and parking
lamp bulb socket
2Turn signal lamp bulb socket
3Fog lamp bulb socket
(driver’s side only)
4Backup lamp bulb socket
Depending on which bulb needs to be
replaced, turn the respective bulb
socket 1 - 4 counterclockwise.
Pull the bulb socket out of the housing.
Similarly turn the bulb counterclock-
wise carefully and pull the bulb out of
bulb socket.
Insert the new bulb into the bulb
socket.
Turn the bulb in the bulb socket clock-
wise carefully.
Insert the bulb socket into the housing.
Turn the bulb socket clockwise until it
engages.

496 Practical hints
Replacing wiper blades
Removing
Remove the SmartKey from the starter
switch.
Vehicles with KEYLESS-GO*
Make sure the vehicle’s on-board
electronics have status0
(
page 41).
1Wiper arm
2Wiper blade
Fold wiper arm 1 away from the rear
window until it engages.
Turn wiper blade2 to form a right
angle with wiper arm 1 as shown.
Hold wiper arm 1 and disengage
wiper blade 2 by carefully sliding it in
direction of arrow.
Remove wiper blade 2.Installing
1Wiper arm
2Wiper blade
Insert wiper blade 2 into wiper
arm1.
Hold wiper arm 1 and engage wiper
blade 2 by pushing it in direction of
arrow until it locks into place.
Check whether the wiper blade is
securely fastened.
Fold the wiper arm to rest on the rear
window.
M a k e s u r e t o h o l d o n t o t h e w i p e r w h e n
folding the wiper arm back.
!Do not pull on the wiper blade insert. It
could tear.

498 Practical hints
Flat tire
Mounting the spare wheel
Preparing the vehicle
Prepare the vehicle as described
(
page 497).
Take the wheel wrench and the vehicle
jack from the vehicle tool kit
(
page 473).
Take the spare wheel from the wheel
well under the cargo compartment
floor (
page 476).Lifting the vehicle
Prevent the vehicle from rolling away
by blocking wheels with wheel chocks
or other sizable objects.
One wheel chock is included with the
vehicle tool kit (
page 473).
When changing wheel on a level surface:
Place the wheel chock in front of and
another sizable object behind the
wheel that is diagonally opposite to the
wheel being changed.
Always try lifting the vehicle using the jack
on a level surface. However, should cir-
cumstances require you to do so on a hill,
place the wheel chock and another sizable
object as follows:
Place the wheel chock and another
sizable object on the downhill side
blocking both wheels of the axle not
being worked on.
Warning!G
The jack is designed exclusively for jacking
up the vehicle at the jack take-up brackets
built into both sides of the vehicle. To help
avoid personal injury, use the jack only to lift
the vehicle during a wheel change. Never
get beneath the vehicle while it is supported
by the jack. Keep hands and feet away from
the area under the lifted vehicle. Always
firmly set parking brake and block wheels
before raising vehicle with jack.
Do not disengage parking brake while the
vehicle is raised. Be certain that the jack is
always vertical (plumb line) when in use,
especially on hills. Always try to use the jack
on level surface.
Make sure the jack arm is fully seated in the
jack take-up bracket. Always lower the vehi-
cle onto sufficient capacity jackstands be-
fore working under the vehicle.