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Replace Back Up Fog Light Bulb Mercedes-Benz 2014–2020 X156

Step-by-step procedure on how to replace the rear fog light and reverse (back-up) light on Mercedes Benz GLA-Class. This tutorial is based on a 2017 GLA250 X156 chassis.

 Replace Back Up Fog Light Bulb Mercedes-Benz 2014–2020 X156
ESTIMATED TIME 15 - 25 mins
DIY COST $ 7 - 15
DIFFICULTY Easy

What you will need

Procedure

  1. Remove the trunk door panel. Click on this link to see the step-by-step procedure on removing and installing the trunk panel.Removing the panel on the trunk door.

     

  2. Locate the rear fog light socket and reverse light socket behind the inner tail light assembly.
  3. Remove the sockets by turning then pulling it out from the tail light assembly.Removing the brake light socket.

     Removing the rear fog light socket.

    Removing the reverse light socket.
  4. Remove the rear fog light bulb from the socket by twisting it counterclockwise and pulling it out.The brake light bulb of the Mercedes Benz GLA250.

     

    Removing the brake light bulb out from the socket.
  5. Line up the new rear fog light bulb to the socket and twist it clockwise to lock it in place.Installing the new brake light bulb.

     

  6. Remove the reverse light from the socket by pulling it out. Then line up the new reverse light to the socket and push it in to lock it into place.
  7. Reinstall the sockets back to the tail light assembly by pushing them in their original position.
  8. Reinstall the trunk panel. For more help with this step, see this guide. Installing the trunk door panel back to the vehicle.

     

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Notes

  • Do not touch light bulbs with bare hands as that can shorten the life of the light bulb. 
  • Installing LED bulbs:
    • If you are upgrading to LED light bulbs, and the bulb doesn't turn on when you install it simply remove the LED bulb and rotate it 180 degrees and reinstall it. 
    • Certain vehicles may trigger a fault message stating faulty or burned light bulb when the original bulb has been upgraded to LED. If that is the case, use halogen bulb or get an Error Free LED bulb
Replace Back Up Fog Light Bulb Mercedes-Benz 2014–2020 X156 Step-by-step procedure on how to replace the rear fog light and reverse (back-up) light on Mercedes Benz GLA-Class. This tutorial is based on a 2017 GLA250 X156 chassis.