Mercedes-Benz GLK-Class: Replacing bulbs

Mercedes-Benz GLK-Class / Mercedes-Benz GLK-Class 1st Gen Owner's Manual / Lights and windshield wipers / Replacing bulbs

Important safety notes

Xenon bulbs

If your vehicle is equipped with Xenon bulbs, you can recognize this by the following: the cone of light from the Xenon bulbs moves from the top to the bottom and back again when you start the engine. For this to be observed, the lights must be switched on before starting the engine.

G DANGER

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 an authorized Mercedes-Benz Center for this purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

Bulbs and lamps are an important aspect of vehicle safety. You must therefore make sure that these function correctly at all times. Have the headlamp setting checked regularly.

Other bulbs

There are bulbs other than the Xenon bulbs that you cannot replace. Replace only the bulbs listed (). Have the bulbs that you cannot replace yourself changed at a qualified specialist workshop.

If you require assistance changing bulbs, consult a qualified specialist workshop. Do not touch the glass tube of new bulbs with your bare hands. Even minor contamination can burn into the glass surface and reduce the service life of the bulbs. Always use a lintfree cloth or only touch the base of the bulb when installing.

Only use bulbs of the correct type.

If the new bulb still does not light up, consult a qualified specialist workshop.

Bulbs and lamps are an important aspect of vehicle safety. You must therefore make sure that these function correctly at all times. Have the headlamp setting checked regularly.

WARNING

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 the bulbs, for example, and injure themselves.

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

Halogen bulbs are pressurized and can explode when you change them, particularly if they are very hot. You should therefore wear eye protection and gloves when you are changing them.

Overview: changing bulbs/bulb types

You can change the following bulbs. The bulb type can be found in the legend.

Halogen headlamps

Turn signal lamp/side marker lamp: WY 5 W
Turn signal lamp: PY 21 W
High-beam headlamp: H7 55 W
Parking lamp/standing lamp: W 5 W
Low-beam headlamp: H7 55 W

Bi-Xenon headlamps

Turn signal lamp/side marker lamp: WY 5 W
Turn signal lamp: PY 21 W
Cornering lamp: H7 55 W
Parking lamp/standing lamp: W 5 W

Tail lamp with/without LED

Tail lamp/brake lamp: P 21 W
Turn signal lamp: PY 21 W
Backup lamp: P 21 W or W 16 W11
Tail lamp/rear fog lamp: P 21 W
A Side marker lamp: W 3 W

License plate lamp

License plate lamp: W 5 W

Changing the front bulbs

Removing/installing the headlamp cover

You must remove the headlamp cover in the engine compartment before you can replace the bulbs in the headlamp.

To remove: press retaining clip 1 in the direction of the arrow.
Pull cover 2 forward underneath cover 3 and remove.
To install: slide cover 2 under cover 3. Connect the two covers by inserting the tongue into the groove.
Press cover 2 until retaining clip 1 engages.

Removing/attaching the washer fluid reservoir

You must remove the washer fluid reservoir from the engine compartment before you can replace the bulbs in the left-hand headlamp.

To detach: turn catch 2 counterclockwise.
Swing washer fluid reservoir 1 far enough to the side to allow the bulbs of the headlamp to be replaced.
To attach: swing back washer fluid reservoir 1.
Turn catch 2 clockwise.

Low-beam headlamps (halogen headlamps)

Switch off the lights.
Open the hood.
Remove the headlamp cover ().
Left-hand headlamp: detach the washer fluid reservoir ().
Turn housing cover 1 counter-clockwise and pull it out.
Pull connector 2 from bulb 4.
Unclip retaining spring 3 and fold it down.
Pull out bulb 4.
Insert the new bulb.
Clip retaining spring 3 back in.
Attach connector 2 to bulb 4.
Attach housing cover 1 and turn it clockwise until it engages.
Left-hand headlamp: fasten the washer fluid reservoir ().
Install the headlamp cover ().

High-beam headlamps (halogen headlamps)

Switch off the lights.
Open the hood.
Remove the headlamp cover ().
Left-hand headlamp: detach the washer fluid reservoir ().
Turn housing cover 1 counter-clockwise and pull it out.
Press the handle of bulb holder 2 in the direction of the arrow until bulb holder 2 is released.
Take out the handle with bulb holder 2.
Take the bulb out of bulb holder 2.

Insert the new bulb into bulb holder 2. Lug 3 of the bulb must be pointing upward.
Insert bulb holder 2.
Push the handle of bulb holder 2 in the opposite direction from the arrow until holder 2 engages.
Align housing cover 1 and turn it clockwise until it engages.
Left-hand headlamp: fasten the washer fluid reservoir ().
Install the headlamp cover ().

Parking lamp/standing lamp

Switch off the lights.
Open the hood.
Remove the headlamp cover ().
Left-hand headlamp: detach the washer fluid reservoir ().
Turn housing cover 1 counter-clockwise and pull it out.
Pull out bulb holder 2.
Take the bulb out of bulb holder 2.
Insert the new bulb into bulb holder 2.
Insert bulb holder 2.
Align housing cover 1 and turn it clockwise until it engages.
Left-hand headlamp: fasten the washer fluid reservoir ().
Install the headlamp cover ().

Turn signal lamps/side marker lamps

Switch off the lights.
Open the hood.
Remove the headlamp cover ().
Left-hand headlamp: detach the washer fluid reservoir ().
Turn bulb holder 1 or 2 counterclockwise and pull it out.
WY 5 W (turn signal lamp and side marker lamp): remove the bulb from bulb holder 1.
PY 21 W (turn signal lamp): turn the bulb counter-clockwise, applying slight pressure, and remove it from bulb holder 2.
WY 5 W (turn signal lamp and side marker lamp): insert the new bulb into bulb holder 1.
PY 21 W (turn signal lamp): insert the new bulb into bulb holder 2 and turn it clockwise while applying slight pressure.
Insert bulb holder 1 or 2 and turn it clockwise.
Left-hand headlamp: fasten the washer fluid reservoir ().
Install the headlamp cover ().

Changing the rear bulbs

Opening and closing the side trim panels

You must open the side trim panel in the cargo compartment before you can change the bulbs in the tail lamps.

Left-hand side trim panel

Right-hand side trim panel

To open: turn release knob 1 90° in the direction of the arrow and remove side trim panel 2.
To close: insert side trim panel 2 and turn release knob 1 90° in the opposite direction to the arrow.

Tail lamp

Switch off the lights.
Open the cargo compartment.
Open the side trim panel ().

Pull out connector 2.
Press retaining lugs 1 simultaneously in the direction of the arrow and pull the bulb holder out.

Bulb holder without LED turn signal lamp

Tail lamp/brake lamp
Turn signals
Backup lamp
ear fog lamp/tail lamp
Side marker lamp

Lightly press the corresponding bulb into the holder, turn it counter-clockwise and remove it from the bulb holder.
Insert the corresponding new bulb into the bulb holder and turn it clockwise.
Attach the bulb holder and press firmly. The retaining lugs on the bulb holder engage audibly.
Insert the connector.
Close the side trim panel ().

License plate lamps

Switch off the lights.
Open the tailgate.
Press lug 2 of license plate lamp 1 in the direction of the arrow and remove license plate lamp lens 1.
Remove license plate lamp lens 1.
Replace the bulb.
Insert license plate lamp lens 1 and press it in until it engages.

Interior lighting