Page 378 of 474

376 Practical hintsLocking/unlocking in an emergency1Separately unlock storage compart-
ments
2Centrally lock/unlock storage com-
partments
3Separately lock storage compartments
Slide mechanical key out of SmartKey
housing (
page 374).
Insert the mechanical key into the
glove box lock and turn it to
position2.
All storage compartments are now un-
locked.
Locking the vehicle
If you are unable to lock the vehicle with
the SmartKey, lock it with the mechanical
key as follows:
Close the passenger door and the trunk
lid.
Press the central locking switch in the
center console (
page 110).
Check to see whether the locking knob
on the passenger door is still visible. If
necessary push it down manually.
Slide the mechanical key out of the
SmartKey.
Lock the driver’s door with the me-
chanical key.
Lowering the load assist manually
If the load assist feature does not fully low-
er the retractable hardtop into the trunk
compartment and you are unable to close
the trunk lid, follow the instructions below.
1Hex-socket wrench
2Locking screw
Remove the trunk floor from the trunk.
Lift up the lid located at the lower left
side of the trunk.
Have a second person lift and hold the
retracted hardtop.
Page 379 of 474

377 Practical hints
Locking/unlocking in an emergency
Using the hex-socket wrench provided
in the vehicle tool kit, carefully turn the
locking screw 2 approximately one
quarter turn.
Hook luggage cover into holders
(page 197).
Let go of the hardtop.
It should gradually lower into the trunk.
When top is completely lowered, return
locking screw 2 to its original posi-
tion.
Close the lid.
Replace the trunk floor.
Visit an authorized Mercedes-Benz
Center as soon as possible.Replacing batteries in the SmartKey/
SmartKey with KEYLESS-GO*
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 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
1Mechanical key
2Battery compartment
Replacement batteries: Lithium, type
CR 2025 or equivalent.
!Do not overtighten the screw.
Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen replacing batteries, always re-
place both batteries. The required re-
placement batteries are available at
any Mercedes-Benz Center.
Page 380 of 474
378 Practical hintsLocking/unlocking in an emergency
Remove mechanical key (
page 374).
Insert the mechanical key1in side
opening and push gray slide.
The battery compartment is unlatched.
Pull battery compartment2out of the
SmartKey housing in direction of ar-
row.
Remove the batteries.
3Battery
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*
1Battery
2Tilt battery up
3Mechanical key
Replacement batteries: Lithium, type
CR 2025 or equivalent.
iThe required replacement batteries are
available at any Mercedes-Benz
Center.
Page 381 of 474
379 Practical hints
Locking/unlocking in an emergency
Remove mechanical key (
page 374).
Insert the mechanical key in side open-
ing and push gray slide.
The battery compartment is unlatched.
Pull the battery compartment out of the
SmartKey housing.
Using mechanical key3, apply pres-
sure to position 2.
Battery 1 tilts up slightly.
Pull battery 1 out in direction of ar-
row.
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.
Page 385 of 474

383 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 posi-
tion M (
page 123).
Open the hood (
page 270)
(except for side marker lamps).
1Bulb socket for turn signal lamp
2High beam headlamp cover
3Low beam headlamp cover (Xenon or
Bi-Xenon* lamp). Do not remove.4High beam bulbs
5Locking mechanism
6Parking and standing lampsFront turn signal bulb
Turn bulb socket 1 counterclockwise
and pull it out.
Push the bulb into socket 1, turn
socket 1 counterclockwise and re-
move it.
Insert the new bulb in socket 1, push
and turn bulb socket 1 clockwise.
Reinsert bulb socket 1 in lamp and
turn bulb socket 1 clockwise.
Warning!
G
Do not remove the cover for the Xenon or
Bi-Xenon* headlamp. Because of high volt-
age in Xenon and 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.
Page 386 of 474

384 Practical hintsReplacing bulbsHigh beam/ high beam flasher bulbs
Press ends of headlamp cover tab to-
gether and remove high beam head-
lamp cover 2.
Pull the electrical connector off.
Turn locking mechanism 5 counter-
clockwise and take out the bulb.
Insert the new bulb so that the base lo-
cates in the recess on the holder.
Turn locking mechanism 5 clockwise.
Plug the connector onto the bulb.
Align high beam headlamp cover 2
and click it into place.Parking and standing lamp bulbs
Press ends of cover tab together and
remove high beam headlamp cover 2.
Pull out bulb socket 6 with the bulb.
Pull the bulb out of bulb socket 6.
Insert a new bulb in bulb socket 6.
Reinstall bulb socket 6.
Align high beam headlamp cover 2
and click it into place.Side marker bulbs
Carefully slide the side marker lamp to-
wards rear.
Remove the front end first.
Turn the bulb socket counterclockwise
and pull it out.
Pull the bulb out of the bulb socket.
Insert the new bulb in socket.
Reinstall the bulb socket, push it in,
and turn it clockwise.
To reinstall the side marker lamp, set
the rear end in bumper and let the front
end snap into place.
Page 387 of 474
385 Practical hints
Replacing bulbs
Replacing bulbs for rear lamps
Before you start to replace a bulb for a rear
lamp, do the following first:
Turn the exterior lamp switch to posi-
tion M (
page 123).
Open the trunk (
page 107).
Tail lamp unit
1Backup lamp
2Turn signal lamp
3Driver’s side: Rear fog lamp
Passenger’s side: Substitute lamp
Fold the trim to the side and remove it.
Turn the bulb socket counterclockwise
and pull it out.
Gently push the bulb into the socket,
turn it counterclockwise and remove it.
Insert the new bulb and reinstall the
bulb socket.
The bulb socket should audibly click
into place.
Reinstall the trim.License plate lamp
1Screws
Loosen both screws 1.
Remove the license plate lamp.
Replace the bulb.
Reinstall the license plate lamp.
Retighten screws 1.
Page 389 of 474
387 Practical hints
Replacing wiper blades
Installing wiper blades
Slide the wiper blade onto the wiper
arm until it locks in place.
Rotate the wiper blade into a position
parallel to the wiper arm.
Fold the wiper arm backward to rest on
the windshield. Make sure you hold on
to the wiper when folding the wiper arm
back.
!Never open the hood when the wiper
arms are folded forward.
Hold on to the wiper when folding the
wiper arm back. If released, the force
of the impact from the tensioning
spring could crack the windshield.
Do not allow the wiper arms to contact
the windshield glass without a wiper
blade inserted.
Make sure the wiper blades are proper-
ly installed. Improperly installed wiper
blades may cause windshield damage.
For your convenience, we recommend
that you have this work carried out by
an authorized Mercedes-Benz Center.