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Trunk License Bulb Replacement
 
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Pelican Technical Article:

Trunk License Bulb Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$1 to $20

Talent:

**

Tools:

Trim removal tool, T20 Torx driver

Applicable Models:

Mercedes-Benz C250 (2012-14)
Mercedes-Benz C300 (2008-14)
Mercedes-Benz C350 (2008-14)

Parts Required:

Bulbs

Hot Tip:

Remove the trunk liner versus the module

Performance Gain:

You can see you license plate at night

Complementary Modification:

Check door panel lights and switches

If you get a fix it ticket because one or both of your trunk license bulbs has burnt out don't pay someone else to fix it for you, you can do it yourself in under an hour and save all kinds of money. While you can remove the light assembly above the plate it can be difficult, and the retaining clips can sometime break. I recommend removing the trunk panel and changing out the bulbs from inside the trunk.

While there are two T20 Torx screws holding the light assembly in the trunk above the license plate (red arrows) if you need to replace the bulbs I do not recommend removing these.
Figure 1

While there are two T20 Torx screws holding the light assembly in the trunk above the license plate (red arrows) if you need to replace the bulbs I do not recommend removing these. The entire assembly can break the clips or damage the paint. Instead, remove the trunk panel and change out the bulbs in under an hour.

Open the trunk and remove the four T20 Torx screws on the trim piece (red arrows).
Figure 2

Open the trunk and remove the four T20 Torx screws on the trim piece (red arrows).

On the backside of the trim piece are three push/pull pins (red arrows) that you will need to remove.
Figure 3

On the backside of the trim piece are three push/pull pins (red arrows) that you will need to remove.

Use a trim removal tool and pull the center part of the clip from the base.
Figure 4

Use a trim removal tool and pull the center part of the clip from the base. Then pull the base and center pin section out.

This is what the push/pull pins look like out of the vehicle.
Figure 5

This is what the push/pull pins look like out of the vehicle. When installing push the base in first and then the center pin section to lock it in place.

You can now lower the trim piece and disconnect the trunk light by squeezing in the connection tab and separating them (red arrow).
Figure 6

You can now lower the trim piece and disconnect the trunk light by squeezing in the connection tab and separating them (red arrow).

Use your trim removal tool, and remove the push pull pins on each trunk support arm.
Figure 7

Use your trim removal tool, and remove the push pull pins on each trunk support arm. Pull the plastic arm cover away from the trunk once the pins are removed.

Next, remove the eight push/pull pins from the trunk liner (red arrows).
Figure 8

Next, remove the eight push/pull pins from the trunk liner (red arrows).

Lower the liner and disconnect the electrical connection for the inside trunk release (red arrow).
Figure 9

Lower the liner and disconnect the electrical connection for the inside trunk release (red arrow).

You can now access the two light connections from inside the trunk (red arrows).
Figure 10

You can now access the two light connections from inside the trunk (red arrows). Grasp the base and turn it 45 degrees counter clockwise.

Pull the bulb base out from the assembly.
Figure 11

Pull the bulb base out from the assembly. The bulb is a wedge bulb. To replace it simply pull it straight out from the base and push the new one in. Never touch the glass of the bulb with your bare hands, as oils from your skin can cause hot spots and diminish the life of the bulb. Installation is the reverse of removal.


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Page last updated: Sat 10/21/2017 03:01:24 AM