2004 E320 Sunroof Drain Leak - Mercedes-Benz Forum
 
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post #1 of 6 (permalink) Old 06-16-2013, 04:24 AM Thread Starter
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2004 E320 Sunroof Drain Leak

I purchased a 2004 E320 4matic from an estate sale 4 months ago w/77K. In the past week we has heavy storms in the northeast and the car had a substantial leak in the passenger's side front foot well. I tracked down the leak and it is coming from a section of the sunroof drain between the front passenger's side drain hole and the bottom of the windshield A pillar. I poured a pint of water in the sunroof drain and it came out of the front passenger outside wheel well and the side of the dash at the same time. The leak is dripping into the vehicle from the right side of the dash console.

I researched the web and found Mercedes issued a "Wheel Well Campaign" in 2007 which involved removing the drain plugs from behind the wheel well liner to ensure a free flow from the drain. Anyone have experience with this?

Any possible suggestions for a fix. There doesn't appear to be a major obstruction because the water almost immediately drains from the wheel well but also into the A pillar. Any instructions or diagrams on how to take apart that area to view all the parts to see where the leak originates?

Thanks in advance!

Bob
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post #2 of 6 (permalink) Old 06-16-2013, 06:39 PM Thread Starter
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2004 E320 Sunroof Drain Leak

Added: I tracked down the leak further. I partially removed the covering for the A pillar, it's NOT coming off easy so I only opened it slightly....... afraid it might snap.

It exposed enough to see that the metal drain pipe (in the A pillar) was fine and the leak is apparently near the roof drain itself. I need to remove the inside pillar covering completely along with the headliner to completely expose the area.

Anyone have any hints or instructions I want to proceed cautiously to avoid causing more damage finding the source of the leak.

Bob
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post #3 of 6 (permalink) Old 06-18-2013, 06:18 PM Thread Starter
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2004 E320 4matic Sunroof Seal Leak

Today we realized there is a gap in the sunroof gasket right over the problem
area. In addition the closed sunroof sits slightly lower than the roof line.
When the car is parked on an downward incline we think it's possible during a
heavy rain the drain hole might not be able to keep up with the water flow.
This might cause the track to overflow which leaks down the "A" pillar. When a
steady stream of water is fed directly in the drain hole there is no leak. Any
thoughts on his theory?


I am trying to locate the gasket which surrounds the sunroof roof hole and the
gasket on the sunroof itself. Any diagrams or part numbers? Hopefully this
will fix the problem.
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post #4 of 6 (permalink) Old 06-19-2013, 05:33 PM Thread Starter
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Sunroof Leak

There was no feedback but I am going to finish my story for anyone interested.
Installed a new seal/gasket.........problem solved!!!!
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post #5 of 6 (permalink) Old 07-10-2013, 09:53 AM Thread Starter
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Sunroof Frame Leak

Sorry to report that the problem was not solved after all. The leak still persists:

I brought the car into an independent shop I use who took the headliner out and examined the area. He called me to say it is leaking from a seal which connects the sunroof frame to the vehicle. He went to a local Mercedes Benz dealer to purchase a seal and was told that the seal is a part of the entire assembly and not sold separately!!!!



The entire sunroof frame has to be replaced at a parts only cost of $1,800. The independent shop suggested that he can remove the frame, clean off the area and reseal it with a sealer similar to that used on a windshield. Does that make any sense to you guys? Any suggestions on what type of sealer would work best?



Is the fix worth doing or should I consider replacing the frame entirely?




I called Mercedes Benz of America in New Jersey and they confirmed that the seal is not sold separately.

Is there anyone else out therte with a similar problem. I am curious if this is a known defect.

Bob
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post #6 of 6 (permalink) Old 06-19-2017, 09:52 AM
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Hello - I now have the same issue and was also quoted $1,700 for the part from Germany. How did you resolve this issue? Thanks. [email protected]
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