How to Replace Mercedes-Benz License Plate Light Bulbs

Is one of your license plate lights burned out? Or are you looking to replace them with blue lights? This guide shows how to replace the bulbs without triggering the ‘Lights Defective’ or ‘License Plate Light Defective’ warning. This is an easy DIY job that requires only a screwdriver.

Tools and parts needed:

• Screwdrivers
• Two replacement bulbs
  
  • Original Bulbs (See Here)
  • or Blue Light Bulbs. ( 6418 36mm Blue Glass Festoon Bulb Bulbs) Colored bulbs may violate local vehicle lighting laws.

Applications

• E-Class (1998-2007)
• C-Class (1998-2007)
• CLK-Class (1998-2007)

Note:

• Use the original incandescent bulb unless you have confirmed that an LED is compatible with your vehicle. Some LEDs trigger a bulb warning. A load resistor may prevent the warning, but it becomes hot and must be mounted away from plastic and wiring.
• We recommend replacing both bulbs at the same time. Both bulbs have similar service lives, so the second bulb may fail soon.

 

REPAIR STEPS

1. Open the trunk. This is not required, but it gives you more room to work.
2. Remove the two screws as shown in the picture.
   
3. Use a flat screwdriver to pry out the plastic bulb housing. Once you remove the screws, the housing comes out.
   
4. Replace the old light bulb with the new one. The bulb sits in the housing, as shown in the picture. You may have to pry it out a little since it is tight. Release one spring contact, then remove the bulb carefully.
   
5. Install the bulb in the housing, then seat the housing in the trunk lid. If it doesn’t fit properly, rotate the housing 180 degrees.
6. Put the two screws back in. Be careful not to over-tighten them.

 

We recommend replacing both bulbs simultaneously.

That is it; you are done!

 

If you have any questions or comments, please post them below in the comments section.