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Mercedes-Benz E 350 Sunroof Problems - How To Troubleshoot And Fix

Your Mercedes-Benz E 350's sunroof allows you to enjoy more of the open air and improves cabin air circulation. The sunroof has two functions: a tilting function to vent hot air out and a full retraction to open fully. Unfortunately, it can stop working for many reasons, such as sudden impact or everyday wear and tear. 

Keep reading to learn more about the Mercedes-Benz E 350 sunroof, how to reset the E 350 sunroof, what to do when the E 350 panoramic roof is not closing, and how to fix the E 350 sunroof.

What Are Some Common Problems with the Mercedes-Benz E 350 Sunroof? 

Electrical and Mechanical Issues

Your Mercedes-Benz E 350 's sunroof could encounter electrical issues caused by a shorted fuse, dead motor, faulty switch, or overall damage. This could cause your sunroof not to open or close completely. 

Sticking and Twisting

Sticking sunroofs open with sudden stops, not retracting fully. This issue could be caused by a lack of lubrication, worn, or snapped cables. If not treated in time, it could result in a dead switch or motor. 

Leaking Water

One of the most common issues with sunroofs, in general, is leakage. Leakage is usually the result of worn and torn or defective rubber seals that retract or warp out of place, allowing water to seep through. If left untreated, the issue can cause serious damage to your vehicle's interior. Outside of faulty seals, another cause of leaking sunroofs is a clog in the drainage system, which funnels water away during rainfall so that it does not pool on your sunroof.

Clog in the Drainage System

Another common issue with defective sunroofs is drainage system clogs. Your drainage system is responsible for carrying the water away, preventing it from accumulating on your roof. Look toward the corners of the sunroof opening to spot its location.

Drainage clog fixes are very simple, only needing a quick visual inspection and a compressed air device to blast the debris out of the system. 

How Do I Fix a Leak and Repair a Clog with My Mercedes-Benz E 350 's Sunroof?

Here are the steps you can take to repair a leaking or clogged drain Mercedes-Benz E 350 sunroof. For this task, you may need one or more wet cloths, a bottle of water, and a compressed air device. 

  1. Perform a visual inspection of the glass seal. Thoroughly inspect it to check for cracks where the water could seep in through.
  2. If you observe no cracks, clear the sunroof track of debris using a wet cloth. Excess debris could eventually make its way to your drain.
  3. Wipe down all seals to prevent any debris from keeping your sunroof partially open when closed.
  4. Locate your sunroof's drains, which are on the sunroof opening corners.
  5. Pour water into the drain and check for any puddles on the ground. Did water puddle on the ground? If so, your drain is clogged. 

To clean a drain, use a compressed air device to remove any debris, partially around the top opening of the tube. You may also use gloved hands, but it is not as effective as using a compressed air device. Repeat Step 5 to ensure that the clog is gone.

How To Perform A Mercedes-Benz E 350 Sunroof Reset

Performing a Mercedes-Benz E 350 sunroof reset is very simple.

  1. Place your sunroof in the tilted position.
  2. Hold the power button for five seconds.
  3. Push your sunroof towards the rear.
  4. Hold the power button for another five seconds.
  5. Push the roof forward.
  6. Hold the power button for another five seconds.

If your Mercedes-Benz E 350 sunroof fails to open, it may be indicative of a more serious issue, such as cracking or seal warping, that needs immediate attention.

All in all, Mercedes-Benz E 350 sunroof problems can be addressed with a quick visual inspection for clogged drains and leaks, as well as a quick reset if there is a partial or full failure to open. You can also purchase replacement sunroof parts right here on our site!