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Discussion Starter · #1 ·
Have a major leak that deposits a pool of water in the back passenger side
footwell. the dealership has had it for a week and they still haven't diagnosed the
problem. anyone have this problem or similar? they want to keep the car until it rains really hard. i want to believe that there is a database somewhere to trouble shoot this issue.
 

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Does your car leak when you go through a car wash? There has to be a better way to simulate rather than wait for rain. They should at least use a garden hose, start from outside the footwell and work there way up.
 
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Same Issue - Costly Dealer Escape Goat

Have a major leak that deposits a pool of water in the back passenger side
footwell. the dealership has had it for a week and they still haven't diagnosed the
problem. anyone have this problem or similar? they want to keep the car until it rains really hard. i want to believe that there is a database somewhere to trouble shoot this issue.
Same issue and the dealer blames the hitch receiver I personally installed. Can you imagine water going up against gravity to the inside of the vehicle? No, the vehicle has not been submerged. They did not find the cause and now want to charge me over $3K to "fix" it (putting the parts back). They offered an option of putting back together but cancelling warranty in some components if I do not pay up. I am a very experienced engineer - it was properly installed , just not by them.

ANY info on this issue will help a lot. The sad part for me is that they could have fixed it but want to charge me anyways for an unreal cause.:mad:
 

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Sorry to hear about the problem.

I haven't had this problem but curious whether there was any flooding or just hard rain. Also (not that it should matter), was the issue on a GLA 250 or 45? (trying to see if there is any commonality)
 

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Sort of reminds me of a very poor quality 1975 factory-ordered Mustang I had. It was parked on an uphill incline and when it rained the windshield leaked down into the passenger floor carpet. After four trips to the local Ford dealership for warranty fix, the official answer was to park it aimed downhill, and they would not accept it for further attempts. Back then quality was not job one, nor did higher headquarters care that I was a dissatisfied customer.
 

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I had a car, a 2004 Ford that had issues like this, all four doors were leaking. Behind the door cards was a moulded plastic membrane that was sealed to the doors metal work, except the sealant was a ittle short along the bottom edge.

water running down from the side windows is supposed to run down the inside of the door and out of the holes near the outer sill. It was running out of the gap cuased by missing sealant in my case and because the doorcard is in the inside of the door rubbers it went in the footwells, all fixed with some silicon sealant.

Just a thought & something to check if not already done.
 

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Your dealer is full of it. I had a hitch put on my 45 and I watched the install and they did not penetrate the body shell, they bolted it to the metal bumper under the fascia. Tell your dealer to explain to you in writing what and where the hitch caused the leak. Bet he won't because he is full of BS. Get a friend and starting under the car and then very slowly move up and hit every possible place there's a penetration to the body while you are inside the car with a flashlight. You'll find the leak and it won't have anything to do with the hitch. Take photos and then call MB.
 

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Have a major leak that deposits a pool of water in the back passenger side
footwell. the dealership has had it for a week and they still haven't diagnosed the
problem. anyone have this problem or similar? they want to keep the car until it rains really hard. i want to believe that there is a database somewhere to trouble shoot this issue.
Pano roof? -250 or -45? How many miles on it? Does it live outside when parked at home? Usually this is caused by a blocked sunroof drain. Water hose is sufficient to simulate rain.

On the VW Sportwagens - pano roof - roof drains came down into the rear wheel wells and could get clogged up with road debris and block up. See: http://pics.tdiclub.com/data/500/PanoRoofDrains.pdf

I'm sure it's a similar setup on the GLA.
 

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Have a major leak that deposits a pool of water in the back passenger side
footwell. the dealership has had it for a week and they still haven't diagnosed the
problem. anyone have this problem or similar? they want to keep the car until it rains really hard. i want to believe that there is a database somewhere to trouble shoot this issue.
WE NEED TO TALK ASAP!

I have the SAME issue and the dealer dismantled the entire car interior. They did find the source and a possible cause related to the rear bumper. Do you have an hitch receiver installed? It is VERY important to know if you do or not. A hitch receiver may favor this condition but if it happens without it, it points to a factory defect.
 

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Your dealer is full of it. I had a hitch put on my 45 and I watched the install and they did not penetrate the body shell, they bolted it to the metal bumper under the fascia. Tell your dealer to explain to you in writing what and where the hitch caused the leak. Bet he won't because he is full of BS. Get a friend and starting under the car and then very slowly move up and hit every possible place there's a penetration to the body while you are inside the car with a flashlight. You'll find the leak and it won't have anything to do with the hitch. Take photos and then call MB.
They actually did a thorough investigation looking for the root cause. I sat with them yestetoday, saw the pictures and videos they took. I also had a chance to check the vehicle, which was stripped down to the metal in the interior of it. Your es, you read it right. :crying:

There are now 2 posibilities: an critical omission by Curt Mfg. and/or a possible design defect. Since the matter has not been fully resolved I can't say more at this moment. The second possibility arises from others with the same issue that do not have a hitch receiver installed. Another user posted the same issue but I do not know if that user has an installed receiver as that detail was not mention in his post. I'll keep you posted.
 

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Here's a link to my install pics, you'll the MB metal bumper in a pick and the Curt hitch is positioned between it and the body when it's reinstalled. My recollection is the bolt were welded to the body so a missing bolt can't happen. Curt had the instructions online so take a look. They should spray water all over that area while someone watches inside. Not rocket science.
 

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The bolts are welded to the bumper. Water instruction does not occur through the bolt openings, that is still outside the car, but rather through the opening behind the bumper plate or the hitch plate. As per CURT instructions you did not replace the factory seal leaving th possibility of water intrusion to the inside of the vehicle. I also suspect that the implementation of this weather "seal" is not very good and water can get in side even for those that have not installed the hitch receiver. This his is evidenced in the many pictures I have found online showing poor seal characteristics of the factory tape used for this purpose.
 

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I have same problems pool of water in
the back passenger side today. how do you fix it?

Jimmy Liu
QUOTE="gamallo, post: 87866, member: 18930"]
QUOTE="gamallo, post: 87866, member: 18930"]
Have a major leak that deposits a pool of water in the back passenger side
footwell. the dealership has had it for a week and they still haven't diagnosed the
problem. anyone have this problem or similar? they want to keep the car until it rains really hard. i want to believe that there is a database somewhere to trouble shoot this issue.
[/QUOTE]
 

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Most all cars have drain lines in the doors and if they get stopped up with pine needles, tree sap, insects, or similar environmental debris water can back up and run into the cabin. I had a brand new (ordered) Audi A5 that leaked into the passenger front footwell the very first rainstorm. And this despite the factory "monsoon test" that is supposed to catch same!? The dealership threw parts at it, including a new windshield, to no avail. They finally sent it to a specialist who said "we've seen this before" and they ran new lines and never a problem thereafter. Factories aren't perfect and dealerships are even further from it. Stand your ground through Benz Corporate if necessary as it can and should be resolved under warranty. All the best.
 

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Most all cars have drain lines in the doors and if they get stopped up with pine needles, tree sap, insects, or similar environmental debris water can back up and run into the cabin. I had a brand new (ordered) Audi A5 that leaked into the passenger front footwell the very first rainstorm. And this despite the factory "monsoon test" that is supposed to catch same!? The dealership threw parts at it, including a new windshield, to no avail. They finally sent it to a specialist who said "we've seen this before" and they ran new lines and never a problem thereafter. Factories aren't perfect and dealerships are even further from it. Stand your ground through Benz Corporate if necessary as it can and should be resolved under warranty. All the best.
Hi, this is really helpful as my GLA45 has just started this, noticed some tide marks on the seats in the back ... When you say "ran new lines in", what do you mean by this ? Where are these lines located please ?
 

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There are drain lines inside the roof pillars that take water from roof to ground. Typically the A and B pillars, with some body types additional.
Clear drain lines are especially important with retractable pano-roofs. See discussion of pano-roof channels/lines in another extensive thread here.
Hi, this is really helpful as my GLA45 has just started this, noticed some tide marks on the seats in the back ... When you say "ran new lines in", what do you mean by this ? Where are these lines located please ?
 

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Total spit ball here, and this is a necrojob ...

I skimmed the prior posts and got a whiff of the circular finger pointing:

1: has this happened to a non-hitch modded car?
2: therefore my spitball thought - might the hitch install cause the water puddle, not thru drilling but rather inadvertent crimping of the drain lines?
 

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During the glorious British Summer we are having, I managed to take pic of the water ingress, any clues as to whether this is the door, roof bars or tail gate ? The roof lining and parcel shelf is dry but the seat base is soaking ...
 
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