MERCEDES-BENZ CLK550 COUPE 2007 C209 Owner's Manual

400 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 5.71 ft
(1.74 m) is required to open the trunk lid.
The trunk lid lock is located next to the
handle above the rear license plate recess.
1Unlocking in an emergency
2HandleInsert the mechanical key into the
trunk lid lock until it stops.
Turn the mechanical key
counterclockwise to position1 and
hold it in this position.
Pull the trunk lid handle2 and lift the
trunk lid.
The trunk opens.
Turn the mechanical key back and
remove it from the trunk lid lock.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or SmartKey with
KEYLESS-GO*, do the following:
Close the passenger door and the
trunk.
Press the central locking switch in the
center console (
page 118).
Check to see whether the locking knob
on the passenger door has moved
down.
If necessary, push it down manually.
Remove the mechanical key out of the
SmartKey (
page 399).
Check whether the trunk is locked.
If necessary, lock the trunk with the
mechanical key (
page 117).
Except for the driver’s door, the vehicle
should now be locked.
!The trunk lid swings open upwards
automatically. Always make sure there is suffi-
cient overhead clearance.

401 Practical hints
Unlocking/locking in an emergency
1Locking
Insert the mechanical key into the
driver’s door lock until it stops.
Turn the mechanical key clockwise to
position1.
The driver’s door is locked.Manually unlocking the gear selector
lever
In case of power failure, the gear selector
lever can be manually unlocked, e.g. to tow
the vehicle.
1Tab
2tool (e.g. flat blade screwdriver)
Pull the tab1 of the covering back in
direction of the center armrest com-
partment.
Insert a tool2 (e.g. flat blade screw-
driver) into the opening.
Perform the following two steps simul-
taneously:
Push tool2 down- and forward in
the direction of the arrow.
Move gear selector lever from
positionP.
Remove the tool2 from the opening.
Push the tab1 of the covering back.
iThis procedure does not arm the anti-theft
alarm system, nor does it lock the fuel filler flap.
iThe gear selector lever is locked again when
moving it to positionP.

402 Practical hints
Opening/closing in an emergency
Power 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 the lens 1 of the interior overhead
light.
1Lens
Remove SmartKey from the starter
switch.
Pry off lens1 using a flat blade
screwdriver.2Locking tabs
Slide both locking tabs2 in the direc-
tion of arrows.
Lower the rear of the cover.
Remove the cover.
Take the crank 3 out of the Operator’s
Manual pouch.
Insert crank3 through hole on the left
side.3Crank
Turn crank3 clockwise to:

slide sunroof closed

raise sunroof at the rear
Turn crank3 counterclockwise to:

slide sunroof open

lower sunroof at the reariDo not disconnect electrical connectors.
iTurn crank3 slowly and smoothly.
The tilt/sliding sunroof must be synchronized af-
ter being operated manually (
page 252).

403 Practical hints
Resetting activated head restraints
Resetting activated head restraints
Resetting activated head restraints
If the active head restraints have been trig-
gered in a rear-end collision, the active
head restraints must be reset. Otherwise,
the active head restraints cannot offer any
additional protection in the event of anoth-
er rear-end collision.
You can tell that the head restraints have
been triggered when they have been
moved forward and cannot be adjusted.
1Head restraint cushion
2Head restraint cover
3Reset tool
4Hole
Take the reset tool3 out of the
Mercedes-Benz vehicle literature
pouch.
Guide reset tool3 into the hole4 be-
tween the rear head restraint cover2
and the head restraint cushion1.
Press the reset tool3 downward until
you hear the active head restraint re-
lease mechanism audibly engage.
Pull out reset tool3.
Firmly press the head restraint
cushion1 back toward the rear head
restraint cover2 until it engages.
Repeat this procedure on the active
head restraint for the second front
seat.
After resetting the active head re-
straints store the reset tool3 in the
Mercedes-Benz vehicle literature
pouch.
For information on active head restraints,
see “Active head restraints” (
page 79).
For information on head restraint adjust-
ment, see “Seats” (
page 39).
iFor your convenience, we recommend that
you have this work carried out by an authorized
Mercedes-Benz Center.
You will find the reset tool for manually operating
the active head restraints in the Mercedes-Benz
vehicle literature pouch.
Warning!G
For safety reasons, have the active head re-
straints checked by an authorized
Mercedes-Benz Center after a rear-end
collision.
Warning!G
When pushing back the head restraint cush-
ion, take care that your fingers do not be-
come caught between the head restraint
cushion and the cover. Failing to do so may
lead to injury.!Be careful not to damage upholstery.

404 Practical hints
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
authorized 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 / SmartKey with
KEYLESS-GO*
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key from the
SmartKey or SmartKey with
KEYLESS-GO* (
page 399).
1Mechanical key
2Battery compartmentWarning!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 changing batteries, always replace
both batteries.
The required replacement batteries are available
at any Mercedes-Benz Center.

405 Practical hints
Replacing SmartKey batteries
Insert mechanical key1 into the
opening.
Press mechanical key1 in direction of
arrow.
The battery compartment2 is un-
latched.
Pull battery compartment2 out of the
housing.
3Batteries
4Contact spring
Remove the batteries3.
Using a lint-free cloth, insert new
batteries3 under the contact
springs4 with the positive terminal
(+) side facing up.
Return battery compartment2 into
housing until it locks into place.
Slide mechanical key 1 back into the
SmartKey.
Check the operation of the SmartKey.

406 Practical hints
Replacing 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 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 distance with the
lights on should clear up the fogging.
iBack-up bulbs will be brought into use when
lamps malfunction. Read and observe the mes-
sages in the multifunction display (
page 387).

407 Practical hints
Replacing bulbs
Bulbs Front lamps Rear lamps
LampType
1Additional turn signal
lampLED
2Turn signal lamp1156 NA
3Halogen headlamp:
Low beam
Bi-Xenon* headlamp:
Low and high beam
1
1Vehicles with Bi-Xenon headlamps* do not replace
the Bi-Xenon bulbs yourself.
H7 (55 W)
D2S-35 W
4Halogen headlamp:
High beam/high beam
flasher
Bi-Xenon* headlamp:
High beam flasher
H7 (55 W)
H7 (55 W)
Parking and standing
lampW 5 W
5Front fog lamp
Corner-illuminating
front fog lamp*H11 (55 W)
H11 (55 W)
6Side marker lampW 5 W
LampType
7High mounted brake
lampLED
8Brake lampP 21 W
9Turn signal lampP 21 W
aTail, parking and stand-
ing lamp, side markerP 21/4 W
W 5 W
bBackup lampP 21 W
cLicense plate lampsC 5 W
dRear fog lamp
(driver’s side only)P 21/4 W

408 Practical hints
Replacing bulbs
Notes on bulb replacement

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

Switch 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 Center.
Have the LEDs and bulbs for the following
lamps replaced by an authorized
Mercedes-Benz Center.

Additional turn signal lamps in the exte-
rior rear view mirrors

High mounted brake lamp

Bi-Xenon* lamps

Front fog lamps

Front side marker lamps
Warning!G
Keep bulbs out of reach of children.
Bulbs and bulb sockets can be very hot. Al-
low the lamp to cool down before changing
a bulb.
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.
!Do not replace the LEDs yourself. You could
otherwise damage the LEDs or parts of the
vehicle. Only have the LEDs replaced by an
authorized Mercedes-Benz Center.

409 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 128).
Open the hood (page 306).
Front lamps halogen-type
1Housing cover for low beam headlamp
2Housing cover for high beam head-
lamp, parking and standing lamp3Bulb socket for turn signal lamp bulb
4Bulb holder of low beam bulb
5Bulb holder of high beam bulb
6Bulb socket for parking and standing
lamp bulb
Low beam bulb
Turn housing cover1 counterclock-
wise and remove it.
Turn bulb holder4 with the bulb coun-
terclockwise and remove it.
Pull the bulb at its socket out of bulb
holder4.
Insert the new bulb so that its socket
locates in the recess of bulb holder4
and is level to it.
Reinsert bulb holder4 with the bulb in
the lamp and turn clockwise.
Align housing cover1 and turn it
clockwise.
High beam bulb
Turn housing cover2 counterclock-
wise and remove it.
Turn bulb holder5 with the bulb coun-
terclockwise and remove it.
Pull the bulb at its socket out of bulb
holder5.
Insert the new bulb so that its socket
locates in the recess of bulb holder5
and is level to it.
Reinsert bulb holder5 with the bulb in
the lamp and turn clockwise.
Align housing cover2 and turn it
clockwise.