CLK-Class Interactive Owner's Manual [In depth | Practical advice

Notes on changing bulbs

Bulbs and lamps are an important aspect of vehicle safety. You must therefore make sure that all bulbs function correctly at all times.

Risk of injury

Bulbs and lamps can be very hot. You should therefore allow them to cool down before you change them. Otherwise, you could be burned if you touch them.

Keep bulbs out of the reach of children. Otherwise, they could damage them, for example, and injure themselves.

Never use a bulb which has been dropped. Such a bulb may explode and injure you.

H7 bulbs are pressurised and could explode when you change them, particularly if they are very hot. You should therefore wear eye protection and gloves when you are changing them.

Risk of injury

Xenon bulbs carry a high voltage. You could get an electric shock and be seriously or even fatally injured if you touch the electric contacts on xenon bulbs. Therefore, never remove the cover from xenon bulbs.

Do not change xenon bulbs yourself, but have them replaced at a qualified specialist workshop which has the necessary specialist knowledge and tools to carry out the work required.

Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

Overview

Front bulbs

	Bulb	Type
	Additional turn signal lamp	LED
	Dipped-beam headlamps	H7 55 W or D2S 35 W* (Vehicles with bi-xenon headlamps * are fitted with D2S 35 W bulbs. These bulbs must be replaced at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.)
	Turn signal lamp	PY 21 W
	Main-beam headlamp	H7 55 W
	Parking lamp	R 5 W
	Front foglamps	HB4 51 W
	Cornering light function *	H7 55 W

Rear bulbs

	Bulb	Type
	Third brake lamp	LED
	Rear foglamp/tail lamp (The rear foglamp only lights up on the driver's side.)	P 21/4 W
	Tail lamps/parking lamps	P 21/5 W
	Reversing lamp	P 21 W
	Brake lamp	P 21 W
	Turn signal lamp	PY 21 W
	Licence plate lighting	C 5 W

Before changing bulbs

Use only the bulb types specified here.
Switch the lights off before changing a bulb to prevent a short-circuit.
Only hold bulbs with a clean, lint-free cloth.
Do not work with wet or greasy fingers.
If the new bulb still does not light up, consult a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
Have the following bulbs changed at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre:
- The xenon bulbs* for the dipped-beam headlamps
- The additional turn signal lamp in the exterior mirror
- The third brake lamp
- The front foglamp bulbs


Have the headlamp setting checked regularly at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.

Changing the front bulbs

Halogen or xenon* headlamps

resources/font_symbols/mbsymb5/mbsymb5_0031.png

Housing cover for dipped-beam headlamps/xenon headlamps

resources/font_symbols/mbsymb5/mbsymb5_0032.png

Housing cover for main-beam headlamp/side lamp/parking lamp

resources/font_symbols/mbsymb5/mbsymb5_0033.png

Bulb holder for turn signal

resources/font_symbols/mbsymb5/mbsymb5_0034.png

Bulb holder for dipped-beam headlamp

resources/font_symbols/mbsymb5/mbsymb5_0035.png

Bulb holder for main-beam headlamp

resources/font_symbols/mbsymb5/mbsymb5_0036.png

Side lamp/parking lamp

Replacing the dipped-beam headlamps (vehicles with halogen bulbs)

	Switch off the lights.
	Open the bonnet.
	Turn housing cover to the left and remove.
	Turn bulb holder with the bulb to the left and remove.
	Take the bulb out of the bulb holder.
	Insert the new bulb into the bulb holder.
	Place the holder with the new bulb into the light and turn to the right.
	Press on the housing cover and turn to the right.

Replacing the turn signal lamp (front)

	Switch off the lights.
	Open the bonnet.
	Turn bulb holder with the bulb to the left and remove.
	Screw the bulb out of the bulb holder.
	Insert the new bulb into the bulb holder.
	Place the holder with the new bulb into the light and turn to the right.

Replacing the main-beam headlamps (vehicles with halogen bulbs)

	Switch off the lights.
	Open the bonnet.
	Turn housing cover to the left and remove.
	Turn bulb holder with the bulb to the left and remove.
	Take the bulb out of the bulb holder.
	Insert the new bulb into the bulb holder.
	Place the holder with the new bulb into the light and turn to the right.
	Press on the housing cover and turn to the right.

Changing the bulbs in the side lamps and parking lamps

	Switch off the lights.
	Open the bonnet.
	Turn housing cover to the left and remove.
	Pull out bulb holder with the bulb.
	Take the bulb out of the bulb holder.
	Insert the new bulb into the bulb holder.
	Insert the bulb container with the new bulb into the lamp.
	Press on the housing cover and turn to the right.

Changing the rear bulbs

Changing the tail lamps

Tail lamps

Brake lamp

Reversing lamp

Rear foglamp/tail lamp

Side lamp

Turn signal lamp

	Switch off the lights.
	Open the boot lid.
	Open the cover of the tail lamps to the side.
	Push the red retaining clip upwards and pull out the bulb holder.
	Turn the bulb anti-clockwise, applying slight pressure, and remove it from the bulb holder.
	Insert the new bulb into the bulb holder and turn it clockwise.
	Reinsert the bulb holder.
	The retaining clip must engage audibly.
	Close the cover of the tail lamps.

Replacing the licence plate lamp

Licence plate lighting

Screws

	Switch off the lights.
	Open the boot lid.
	Unscrew both screws .
	Take out the lamp.
	Replace the bulb.
	Insert the lamp again.
	Tighten both screws again.