MERCEDES-BENZ C230 2006 W203 Owner's Manual

390 Practical hintsUnlocking/locking in an emergencyUnlocking and opening 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
2Handle

Insert the mechanical key into the
trunk lid lock until it stops.

Turn the mechanical key
counterclockwise to position1.
The trunk lid unlocks.

Pull on handle2.
The trunk opens.

Turn the mechanical key back and
remove it from the trunk lid lock.
Locking the vehicle
If you can not lock the vehicle with the
SmartKey, do the following:
Close the passenger door, the rear
doors and the trunk.

Press the central locking switch in the
center console (
page 107).

Check to see whether the locking
knobs on the doors have moved down.

If necessary push them down manually.

Remove the mechanical key out of the
SmartKey (
page 389).

Check whether the trunk is locked.

If necessary, lock the trunk with the
mechanical key (
page 106).
Except for the driver’s door, the vehicle
should now be locked.
!The trunk lid swings open upwards
automatically. Always make sure there
is sufficient overhead clearance.

391 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.
Fuel filler flap
In case the central locking system does
not release the fuel filler flap, you can open
it manually.
The release button is on the right-hand
side of the luggage compartment behind
the side trim.1Side trim
2Release button

Open the trunk.

Remove the side trim1 from the
right-hand side of the luggage compart-
ment.

Turn release button2 clockwise as far
as will go.
The fuel filler flap is released.

Open the fuel filler flap from outside.
Warning!
G
If you operate the emergency release but-
ton, be careful of the sharp edges so that
you do not injure yourself.

392 Practical hintsUnlocking/locking in an emergencyManually unlocking the transmission gear selector lever
In case of power failure, the transmission
gear selector lever can be manually un-
locked, e.g. to tow the vehicle.
Slide out the swiveling cup holder
(page 259).
1Tool

Insert a tool1 (e.g. flat blade screw
driver) into the opening.

Perform the following two steps
simultaneously:
Press tool1 forward in the
direction of the arrow.

Move gear selector lever from
positionP.

Remove tool1 from the opening.iThe gear selector lever is locked again
when moving it to positionP.

393 Practical hints
Opening/closing in an emergency
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 lens1 of the interior overhead
light.
Remove SmartKey from the starter
switch.

Pry off lens1 using a flat blade
screwdriver.

Slide both locking tabs2 in direction
of the arrows.

Lower the rear of the cover and
remove.

Remove the cover.

Take the crank3 out of the Operator’s
Manual pouch.

Insert crank3 through hole on the left
side.

Turn crank3 clockwise to:

slide sunroof closed


raise sunroof at the rear

Turn crank3 counterclockwise to:

slide sunroof open


lower sunroof at the rear
iDo not disconnect electrical
connectors.
iTurn crank3 slowly and smoothly.
The tilt/sliding sunroof must be
synchronized after being operated
manually (
page 246).

394 Practical hintsResetting activated head restraintsResetting activated head restraints
If the active head restraints has been trig-
gered in a rear-end collision, the active
head restraints must be reset. Otherwise,
the active head restraint cannot offer any
additional protection in the event of anoth-
er rear-end collision.

Take the reset tool out of the
Mercedes-Benz vehicle literature
pouch.

Guide reset tool into center of head re-
straint between head restraint cushion
and rear head restraint cover.

Press the reset tool forward in the di-
rection of the arrow.

Press reset tool downward until you
hear the head restraint release
mechanism audibly engage.

Pull out reset tool.

Firmly press the head restraint cushion
back toward the rear head restraint
cover until it engages.

Repeat this procedure on the active
head restraint for the second seat.
For information on active head restraints,
see “Active head restraint” (
page 73).
For information on head restraint adjust-
ment, see “Seats” (
page 35).
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.
!Take care to avoid damaging the uphol-
stery.
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.

395 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey are
discharged, 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.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
replace both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.

396 Practical hintsReplacing SmartKey batteriesSmartKey
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key
(page 389).
1Mechanical key
2Slide
3Battery compartment

Insert the mechanical key1 in direc-
tion of arrow in side opening.

Using mechanical key1, push gray
slide 2 to unlatch battery compart-
ment 3.

Pull battery compartment3 out of the
housing in direction of arrow.
4Battery
5Contact spring

Remove the batteries4 in direction of
arrow.

Using a lint-free cloth, insert new
batteries4 under the contact
spring5 with the positive terminal (+)
side facing up.

Return battery compartment3 into
housing until it locks into place.

Slide mechanical key1 back into the
SmartKey.

Check the operation of the SmartKey.

397 Practical hints
Replacing bulbs
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.
iSubstitute bulbs will be brought into
use when lamps malfunction. Observe
the messages in the multifunction
display (
page 377).

398 Practical hintsReplacing bulbsBulbs Front lamps
Lamp
Type
1
Additional turn signal
lamp
LED
2
Halogen headlamp:
Turn signal lamp
Bi-Xenon* headlamp:
Turn signal lamp
1156 A
2357 A
3
Halogen headlamp:
Low beam
Bi-Xenon* headlamp:
Low and high beam
1
1Vehicles with Bi-Xenon* headlamps: Low beam
and high beam use the same D2S-35W lamp. Do
not replace the Xenon bulbs yourself. Contact an
authorized Mercedes-Benz Center.
H7 (55 W)
D2S-35 W
Lamp
Type
4
Halogen headlamp:
High beam/high beam
flasher
Bi-Xenon* headlamp:
High beam flasher
H7 (55 W)
H7 (55 W)
Parking and standing
lamp
W5W
5
Front fog lamp
HB4 (51 W)
Front fog lamp with
cornering fog lamp*
H7 (55 W)
6
Side marker lamp
W5W

399 Practical hints
Replacing bulbs
Rear lamps 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.
Lamp
Type
7
High mounted brake
lamp
LED
8
Brake lamp
P21W
9
Turn signal lamp
PY 21 W
a
Parking and side
marker lamp
P21/5W
b
Backup lamp
P21W
c
License plate lamps
C5W
d
Rear fog lamp (driver’s
side only), tail and
standing lamp
P21/4W
Warning!
G
Bulbs and bulb sockets can be very hot.
Allow the lamp to cool down before
changing 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.