Right LED Headlight Control Module A2479004204 for Mercedes-Benz A, C, CLA, GLA, GLB, GLC, GLE (2019-2022)

New RIGHT side (passenger side) LED headlight control module, a direct replacement for Mercedes-Benz A2479004204 (247 900 42 04), for 2019-2022 Mercedes-Benz A-Class, C-Class, CLA, GLA, GLB, GLC and GLE models with factory LED headlights. Replacement unit for Mercedes-Benz, not a Genuine Mercedes-Benz part. Right side only. Free shipping to the lower 48.

Fix a Dark or Flickering LED Headlight

This module drives the LED light sources inside the right headlamp. When it fails the right headlight can go dark or flicker and a lighting fault can appear. Replacing just the module costs far less than a complete LED headlamp.

Fits

Fits vehicles with the factory LED headlamp. Match the part number on your old module before ordering.

OEM / Interchange Part Numbers

• Mercedes-Benz A2479004204
• 2479004204
• 247 900 42 04

Common Signs of a Failed Module

• One LED headlight goes dark while the other works
• LED headlight flickers or cuts out
• Headlight or lighting fault message on the dash
• Daytime running light or low beam section stops working

Specs

• Brand: replacement for Mercedes-Benz (not Genuine OEM)
• Lighting technology: LED
• Function: LED headlight control module
• Placement: front right (passenger) headlight only
• Mounting: screw-on
• Programming: may be required
• Sold as one unit, new
• Warranty: 1 year

What's Included

• 1 x right LED headlight control module A2479004204 (replacement)

Installation

1. Switch the lights and ignition off and disconnect the negative battery cable.
2. On the Mercedes-Benz A, C, CLA, GLA, GLB, GLC or GLE the LED control module is mounted to the back or bottom of the headlamp housing. On most models the headlamp has to be unbolted and pulled forward (bumper cover loosened) to reach it.
3. Unplug the module connector, remove the screws holding it and take the old module off.
4. Compare the part number on your old module to the numbers above before fitting the new one.
5. Fit the new module, refit its screws and lock the connector fully. Reinstall the headlamp and trim and reconnect the battery.
6. Then test the headlight. On these Mercedes-Benz models the new module may need to be coded / programmed to the vehicle with a Mercedes-capable diagnostic tool (XENTRY or equivalent) before the light works correctly, so plan for a dealer or specialist shop visit if you do not have one.

FAQ

Is this a Genuine Mercedes-Benz part?
No. It is a new replacement built to fit in place of Mercedes-Benz A2479004204 (247 900 42 04).

Which side does it fit?
The right (passenger) side headlight only. The left side uses a different part number. It may need coding to the vehicle after install.

Is shipping free?
Yes, shipping is free to the lower 48 US states.