Page 414 of 506
412 Practical hintsUnlocking/locking in an emergencyFuel filler flap emergency release
In case the central locking system does
not release the fuel filler flap, you can open
it manually.
1Release knob
Open trunk lid.
Remove right-side tail trim.
Turn release knob1 clockwise (ar-
row).
The fuel filler flap can know be opened.Manually unlocking the transmission
selector lever
In the case of power failure, the transmis-
sion selector lever can be manually un-
locked, e.g. to tow the vehicle.
Depending on production date, your vehi-
cle is equipped with cup holders in either
the center console or in the center arm-
rest.
Cup holder in the center console
1Pin
Open the storage compartment in the
center console (
page 265).
Take out the cup holder (
page 266).
Hold the cover at a 45° angle.
Insert a suitable object1 (e.g. a pin)
through the hole and press the pin
downward.
Remove pin1. iThe selector lever is locked again when
moving it to positionP.
Page 415 of 506
413 Practical hints
Unlocking/locking in an emergency
Cup holder in the center armrest
1Pin
Open the storage compartment in the
center armrest (
page 266).
Take out the cup holder (
page 266).
Insert a suitable object1 (e.g. a pin)
through the hole and press the pin
downward.
Remove pin1. iThe selector lever is locked again when
moving it to positionP.
Page 416 of 506
414 Practical hintsOpening/closing in an emergencyPower tilt/sliding sunroof* or panora-ma roof with power tilt/sliding panel*
You can open or close the tilt/sliding sun-
roof or tilt/sliding panel manually should
an electrical malfunction occur.
The tilt/sliding sunroof or tilt/sliding panel
drive is located behind lens1 of the inte-
rior overhead light.
1Cover
Remove the SmartKey from the starter
switch.
Press on cover1 in direction of the ar-
row to release it.2Hole
3Crank
Take crank3 out of the glove box.
Insert crank3 through hole2.
Turn crank3 clockwise to:
slide roof panel/sunroof closed
raise roof panel/sunroof at the rear
Turn crank3 counterclockwise to:
slide roof panel/sunroof open
lower roof panel/sunroof at the
rear
iTurn crank3 slowly and smoothly.
The tilt/sliding sunroof or tilt/sliding
panel must be synchronized after being
operated manually (
page 225) or
(
page 229).
Page 417 of 506

415 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey 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 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 the mechanical key1
(page 410).
1Mechanical key
2Battery compartment
Insert the mechanical key1 in side
opening and push gray slide.
Battery compartment2 is unlatched.
Pull battery compartment2 out of the
housing in direction of arrow.
Remove the batteries.
Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen inserting the batteries, make
sure they are clean and free of lint.iWhen replacing batteries, always re-
place both batteries.
The required replacement batteries are
available at any Mercedes-Benz Cen-
ter.
Page 418 of 506
416 Practical hintsReplacing SmartKey batteries3Battery
4Contact spring
Using a lint-free cloth, insert new bat-
teries under the contact spring with the
plus (+) side facing up.
Return battery compartment into hous-
ing until it locks into place.
SmartKey with KEYLESS-GO*
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key (
page 410).
1Battery
2Tilt battery up
3Mechanical key
Insert the mechanical key3 in side
opening and push grey slide.
Battery compartment is unlatched.
Pull battery compartment out of the
housing in direction of arrow.
Using mechanical key3 apply pres-
sure to position2.
Battery1 tilts up slightly.
Pull out batteries1 in direction of ar-
row.
Using a lint-free cloth, insert new bat-
teries with the plus (+) side facing up.
Return battery compartment into hous-
ing until it locks into place.
Page 419 of 506
417 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 your autho-
rized Mercedes-Benz 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.
iSubstitute bulbs will be brought into
use when lamps malfunction. Observe
the messages in the multifunction dis-
play (
page 392).
Page 422 of 506
420 Practical hintsReplacing bulbsReplacing bulbs for front lamps
1Bulb socket for high beam head-
lamp/high beam flasher bulb
2Bulb socket for parking and standing
lamp bulb
3Housing cover for low
beam/Bi-Xenon* headlamp4Bulb socket for turn signal lamp bulb
5Electrical connector for high beam
headlamp/high beam flasher bulb
6Bulb socket for parking and standing
lamp bulb
7Electrical connector for low beam
headlamp bulb (halogen headlamps
only)
Before you start to replace a bulb for a
front lamp, do the following first:
Turn the exterior lamp switch to
positionM (
page 133).
Open the hood (
page 303) (except
for side marker lamps).
Warning!
G
Do not remove the cover3 for the Bi-Xe-
non* headlamp. 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.
Page 424 of 506

422 Practical hintsReplacing bulbsSide marker lamp bulb
Carefully slide the lamp towards the
front in direction of arrows.
Remove the rear end first.
Turn the bulb socket with the bulb
counterclockwise and remove it.
Pull the bulb out of the bulb socket.
Insert the new bulb into the bulb sock-
et.
Place the bulb socket back into the
lamp and turn it clockwise.
To reinstall the lamp, set the front end
in the bumper and let the rear end en-
gage.
Replacing bulbs for rear lamps
Tail lamp unit
The tail lamps are equipped with HiP bulbs.License plate lamp
1Screw
Turn the exterior lamp switch to
positionM (
page 133).
Loosen both screws1.
Remove the license plate lamp.
Replace the bulb.
Reinstall the license plate lamp.
Retighten screws1.
Warning!
G
The bulbs in the tail lamps cannot be re-
placed individually. The tail lamp bulbs are
under pressure and could explode during an
attempt to replace them.
If the tail lamps are malfunctioning, have
them exchanged at an authorized
Mercedes-Benz Center.