Mercedes-Benz Door Glass Window Replacement Guide
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Need to replace your Mercedes-Benz door glass? By following the procedures below, learn how to remove and install the door glass on your Mercedes-Benz. This guide provides instructions on replacing the door glass on a Mercedes Benz.
At a Glance
- Time: about one hour; tools are a T30 Torx driver and a flat screwdriver.
- Wear gloves and eye protection, especially if the old glass is broken.
- Leave the door panel airbag wiring connected if you can, to avoid an airbag light.
- Loosen, don’t remove, the two clamp bolts; tighten them gently on the new glass.
- Hold the switch up for a few seconds after refitting to reset one touch operation.
What you will need
Parts
- Mercedes-Benz door glass window
Tools
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- T30 screwdriver
- Flathead screwdriver
Procedure
- Remove the door panel by following this guide.
- Pop out the two round rubber pieces to expose the window bolts.
- Lower the window a few inches to expose the window bolts. If your door panel has an airbag on the back, keep the door panel and wires connected to avoid triggering the airbag (SRS) light. If you trigger the airbag light, you must use a Mercedes-Benz scanner to reset the light.
- Align the window frame to the access holes and use a T30 Torx drive to loosen the bolts. Do not fully remove these bolts. They need to be loose.
- Using the palms of your hands, hold the glass window to prevent it from going down, then, using the window switch, lower the window down.
- Move the glass up and down to get it loose, then pull it up.
- Slowly lower the glass, then remove it by pulling it up but getting out of the rails. Finally, remove the glass from the door.
- Prepare the new glass window. Please insert the new glass window into the door slot and lower it to the bottom. Then, move the glass up, ensuring it slides correctly on the rails.
- Position the glass window so the bottom end of the door glass will be level with the access holes. Tape the glass at this location or have a friend hold it here.
- Raise the window riser using the window control until the frame reaches the end of the glass window.
- Reinstall and fasten window bolts. Don’t overtighten, or you will crack the glass. Also, ensure the window brackets have rubber pieces; otherwise, the glass may break.
- Raise the window fully and keep holding the switch up for a few seconds to reset the one touch and anti pinch function. Check that the glass seals evenly against the frame, then reinstall the door panel.
Removing and replacing the door glass on a Mercedes-Benz is easy and takes about one hour. The procedure is the same for both front and rear door windows.
Removing the door panel can be challenging as some Mercedes-Benz have two bolts hidden behind the door handle. These pictures are from a 2010 Mercedes-Benz GL550, but the procedure can apply to other models.
Window Still Not Working Right?
If the window will not go all the way up, reverses on its own, or the one touch feature does not work, run the reset again: hold the switch down until the glass is fully open, then hold it up for a few seconds after it closes. If that does not fix it, check the regulator and the window motor connector. A door control module can also store faults. A scan tool such as the YOUCANIC UCAN-II Pro can read door module codes and run window initialization on supported models.
Frequently Asked Questions
How long does it take to replace a Mercedes door window?
About one hour with a T30 Torx driver and a flat screwdriver.
Do I need to remove the window clamp bolts?
No. Loosen the two clamp bolts to release the glass, then tighten them gently on the new glass.
Why is my airbag light on after removing the door panel?
Unplugging the door airbag wiring with the ignition on can set a fault. Leave it connected if you can, and clear the code with a scan tool if the light comes on.
How do I reset the one touch window after replacing the glass?
Hold the switch up for a few seconds after the window closes fully to reset one touch operation.
Check these troubleshooting and repair guides for more help on your Mercedes-Benz.
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