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

Changing the bulbs

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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 are under high voltage. You could get an electric shock and be seriously or even fatally injured if you touch the electric contacts on xenon bulbs. Do not, therefore, remove the cover on 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.


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.)
	Parking lamp/side lamp	W 5 W or H 6 W
	Main-beam headlamps (Vehicles with halogen headlamps) /main-beam spot lamps* (Vehicles with bi-xenon headlamps*)	H7 55 W
	Turn signal lamp	PY 21 W
	Dipped-beam headlamp	H7 55 W or D1S 35 W* (Vehicles with xenon headlamps*: always have these bulbs changed at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.)
	Front foglamp/cornering light	H11 55 W

Rear bulbs

	Bulb	Type
	Third brake lamp	LED
	Licence plate lighting	C 5 W
	Rear foglamp	P 21 W
	Tail lamp	P 4 W
	Turn signal lamp	PY 21 W
	Reversing lamp	P 21 W
	Brake lamp	P 21 W

Before changing bulbs

You can replace the following bulbs:

Dipped-beam headlamps (vehicles with halogen headlamps)
Main-beam headlamps (vehicles with halogen headlamps)
Replacing the bulb in the main-beam spot lamp* (vehicles with bi-xenon bulbs*)
Replacing the bulb in the side lamp/parking lamp (vehicles with halogen headlamps)
Turn signal lamp (front)
Brake lamp
Reversing lamp
Rear foglamp/tail lamp
Turn signal (rear)
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.


Due to the location of the front headlamps, it is best to have the bulbs changed at 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

Opening/closing the cover in the front wheel arch

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Retaining screw

Cover in front wheel arch

Opening

	Turn the front wheels inwards.
	Unscrew retaining screw .
	Fold the cover down.

Closing

	Fold the cover upwards.
	Screw in retaining screw .

Removing/fitting the washer fluid reservoir

You must remove the washer fluid reservoir in the engine compartment before replacing the bulbs for the front left-hand headlamp.

Retaining screw

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Washer fluid reservoir

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Bracket

Washer fluid reservoir in the engine compartment

Removing

	Turn retaining screw anti-clockwise.
	Remove washer fluid reservoir from bracket .
	Put washer fluid reservoir to one side and leave the lines and hoses connected. Make sure that no washer fluid escapes.

Fitting

	Guide washer fluid reservoir with the lower retaining lug in the rubber grommet on the longitudinal member into bracket .
	Turn retaining screw clockwise.

Housing cover for main-beam headlamp/side lamp

Housing cover for dipped-beam headlamp

Halogen headlamps

Bulb holder for turn signal

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Bulb holder for dipped-beam headlamp

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Bulb holder for main-beam headlamp

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Bulb holder for side/parking lamps

Halogen headlamps (CLASSIC or ELEGANCE design and equipment line*)

Bulb holder for turn signal

Bulb holder for dipped-beam headlamp

Bulb holder for main-beam headlamp

Bulb holder for side/parking lamps

Halogen headlamps (AVANTGARDE design and equipment line*)

Housing cover for main-beam spot lamp*

Housing cover for dipped-beam headlamp (bi-xenon)*

Bi-xenon headlamps*

Bulb holder for turn signal

Bulb holder for side lamp

Bulb holder for main-beam spot lamp*

Bi-xenon headlamps*

Replacing dipped-beam headlamps (vehicles with halogen headlamps)

Vehicles with the CLASSIC or ELEGANCE design and equipment lines*

	Switch off the lights.
	Open the cover in the front wheel arch more.
	Open the bonnet.
	Remove the washer fluid reservoir more.
	Press housing cover retaining lug down and remove housing cover .
	Disconnect the connector from the bulb.
	Turn bulb holder bayonet catch anti-clockwise.
	Remove the bulb from the bulb holder, holding the base (not the glass tube).
	Insert the new bulb so that the base fits flush in the recess in the bulb holder.
	Turn bulb holder bayonet catch clockwise until you hear it engage.
	Attach the connector to the bulb.
	Align the bottom of housing cover and fold it upwards until it engages.

Vehicles with the AVANTGARDE design and equipment line*

	Switch off the lights.
	Open the cover in the front wheel arch more.
	Open the bonnet.
	Remove the washer fluid reservoir more.
	Press housing cover retaining lug down and remove housing cover .
	Disconnect the connector from the bulb.
	Detach the retainer spring and remove bulb .
	Insert the new bulb so that the base fits flush in the recess in the bulb holder.
	Attach the retainer spring.
	Attach the connector to the bulb.
	Align the bottom of housing cover and fold it upwards until it engages.

Replacing the bulb in the main-beam headlamps/main beam spot lamp*

	Switch off the lights.
	Open the cover in the front wheel arch more.
	Open the bonnet.
	Remove the washer fluid reservoir more.
	Press housing cover retaining lug down and remove housing cover .
	Disconnect the connector from the bulb.
	Turn bulb holder bayonet catch anti-clockwise.
	Remove the bulb from the bulb holder, holding the base (not the glass tube).
	Insert the new bulb so that the base fits flush in the recess in the bulb holder.
	Turn bulb holder bayonet catch clockwise until it engages audibly.
	Attach the connector to the bulb.
	Align the bottom of housing cover and fold it upwards until it engages.

Replacing the bulb in the side lamp/parking lamp (vehicles with halogen headlamps)

	Switch off the lights.
	Open the cover in the front wheel arch more.
	Open the bonnet.
	Remove the washer fluid reservoir more.
	Press housing cover retaining lug down and remove housing cover .
	Pull out bulb holder
	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.
	Align the bottom of housing cover and fold it upwards until it engages.

Replacing the bulbs in the turn signal lamps

	Switch off the lights.
	Open the cover in the front wheel arch more.
	Open the bonnet.
	Remove the washer fluid reservoir more.
	Turn bulb holder anti-clockwise and remove it along with the bulb.
	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.
	Insert the bulb holder into the headlamp and turn it clockwise.

Changing the rear bulbs

Opening and closing the side trim panels

You need to open the side trim panel in the load compartment before changing the bulbs in the tail lamps.

Release button

Side trim panel

Left-hand side trim panel

Release button

Side trim panel

Right-hand side trim panel

Opening

	Turn release button 90° in the direction of the arrow and remove side trim panel .
	Left side: remove the compressor.
	Right side: remove the stowage compartment.

Closing

	Left side: insert the compressor.
	Right side: insert the stowage compartment.
	Insert side trim panel and turn release button 90° in the opposite direction to the arrow.

Changing the tail lamps

	Switch off the lights.
	Open the luggage compartment.
	Open the side trim panel more.

Retaining clips

Bulb holder

Simultaneously push retaining clips resources/font_symbols/mbsymb5/mbsymb5_0031.png in the direction of the arrow and remove the bulb holder.

Brake lamp

Reversing lamp

Turn signal lamp

Rear foglamp/tail lamp

Bulb holder

	Lightly press the corresponding bulb into the bulb holder, turn it anti-clockwise and remove it from the bulb holder.
	Insert the new bulb into the bulb holder and turn it clockwise.
	Attach the bulb holder and press firmly.
	The retaining clips of the bulb holder engage audibly.
	Close the side trim panel more.

Replacing the licence plate lamp

Licence plate lamp

	Switch off the lights.
	Open the tailgate.
	Using a screwdriver, loosen both sides of licence plate lamp in the direction of the arrow.
	Remove licence plate lamp .
	Replace the bulb.
	Insert licence plate lamp and press it in until it engages.