CLS - 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.

Risk of injury

HiP bulbs are pressurised and may explode when you change them, thereby injuring you.

Do not change HiP bulbs yourself; 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.


Do not change the LEDs yourself. You could otherwise damage the LEDs or parts of the vehicle.

Overview

Front bulbs

	Bulb	Type
	Additional turn signal lamp	LEDs (These bulbs must be replaced at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.)
	Turn signal lamp	PY 21 W
	Dipped-beam headlamp	H7 55 W (Vehicles with halogen headlamps) or D1S 35 W* (Vehicles with bi-xenon headlamps*: always have these bulbs changed at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.)
	Main-beam headlamp	H7 55 W
	Side lamp/parking lamp	W 5 W
	Front foglamp	H11 55 W

Rear bulbs

	Bulb	Type
	Third brake lamp	LED
	Rear foglamp	HiP
	Side lamp/parking lamp	HiP
	Reversing lamp	HiP
	Brake lamp	HiP or LED*
	Turn signal lamp	HiP
	Licence plate lighting	C 5 W

Before changing bulbs

You can replace the following bulbs:

Dipped-beam headlamps (vehicles with halogen headlamps)
Main-beam headlamps
Side lamp and parking lamp
Turn signal lamp (front)
Licence plate lighting

Observe the following points:

Use only the bulb types specified here.
To prevent a short-circuit, switch off the lights before changing a bulb.
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 headlamp setting checked regularly at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.

Changing the front bulbs

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Bulb holder for turn signal

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Housing cover for dipped-beam headlamp (halogen/bi-xenon headlamps)

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Housing cover for main-beam headlamp/side lamp

Halogen or bi-xenon* headlamps

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Bulb holder for main-beam headlamp

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Bulb holder for side lamp

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Bulb holder for dipped-beam headlamp

Halogen headlamps

Replacing dipped-beam headlamps (vehicles with halogen headlamps)

	Switch off the lights.
	Open the bonnet.
	Turn housing cover anti-clockwise and remove it.
	Turn bulb holder anti-clockwise until it is released.
	Pull out bulb holder
	Change the bulb.
	Insert bulb holder into the headlamp and turn it clockwise until it engages.
	Place housing cover back on and turn it clockwise until it engages.

Replacing the bulbs in the main-beam headlamps

	Switch off the lights.
	Open the bonnet.
	Turn housing cover anti-clockwise and remove it.
	Turn bulb holder anti-clockwise and remove it together with the bulb.
	Pull the bulb out of bulb holder .
	Insert the new bulb into bulb holder .
	Insert bulb holder into the headlamp and turn it clockwise until it engages.
	Place housing cover back on and turn it clockwise until it engages.

Changing the bulbs in the side lamps and parking lamps

	Switch off the lights.
	Open the bonnet.
	Turn housing cover anti-clockwise and remove it.
	Turn main-beam headlamp bulb holder anti-clockwise until it disengages and then remove it together with the bulb.
	Turn the bulb anti-clockwise, applying slight pressure, and remove it from bulb holder .
	Insert the new bulb into bulb holder and turn it clockwise.
	Pull out bulb holder .
	Insert main-beam headlamp bulb holder into the headlamp and turn it clockwise until it engages.
	Place housing cover back on and turn it clockwise until it engages.

Replacing the turn signal lamps

	Switch off the lights.
	Open the bonnet.
	Turn bulb holder anti-clockwise and remove it along with the bulb.
	Turn the bulb anti-clockwise, applying slight pressure, and remove it from bulb holder .
	Insert the new bulb into bulb holder and turn it clockwise.
	Insert bulb holder into the headlamp and turn it clockwise until it engages.

Changing the rear bulbs

Replacing the licence plate lamp

Screws

Licence plate lighting

	Switch off the lights.
	Open the boot lid.
	Remove screws .
	Remove licence plate lamp .
	Replace the bulb.
	Insert licence plate lamp .
	Replace and tighten the screws .