I have water ingress that is soaking the carpet around the 2 rear mounting points (where the seat bolts to the floor) of the right hand front seat of my '92 300TE-24.

The mount areas are recessed, so I'm getting two nice little ponds forming. The left hand side is dry.

The rest of the carpet is also dry, including the area between the rear mounts where the heater outlet is located. and it only seems to happen when the car is moving?

BTW, I'm in the UK so under the drivers seat.

I've done a search, but can't seem to come up with anything.

Maybe the sunroof is dripping some water? I think the rear edge of it is right over the back of the front seats. I'll ask the stupid question, does this only happen when it rains?

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Streetside: 1987 Mercedes 300E Petrol Blue/Green
2014 Ford Mustang Grabber Blue
1999 Ford Ranger Green

Dockside: 1968 Eltro 17
1985 Silverton 34C

Sorry should have said - Yes only when it rains, and it seems only when the car is moving.

if it only happens when raining and when in motion then the leak points to check are

1 the front wiper tray edges - which drain into their specific plastic tubes
2 the rear wheelhouse rubber plugs - this can literally flood your car with gallons of water when moving in water.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

Quick update - lifted the front footwell carpets. Right hand side (drivers side in Scotland) is soaking wet. The foam backing of the carpet holds a lot of water!
Left hand side is dry.

I cleared the front sunroof drains with some plastic tubing, quite a lot of leaves/ debris removed, so I'm hoping this was the issue

Any suggestions as to other likely place (s) for water ingress would be greatly appreciated!

eta Is there a diagram/info on drain holes for the T model 124's available anywhere?

Post 12 has a pdf file of drain locations.

New owner problems - Page 2 - Benzworld.org - Mercedes-Benz Discussion Forum

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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Thanks TnBob, much appreciated.

hab5000, if the lower windshield molding/seal is not tight water can enter the passenger compartment. I had that problem with a 1995 E320.

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Fred Hoelzle

Ferdman, I'm starting to suspect the windscreen seal might be the issue.

Quick update - I've been trying to eliminate more possible areas of water ingress, and discovered this today. (See pic below) The rubber bung is missing from the right hand (drivers in the UK) front wheel arch inner panel.

The opposite side has the same hole but the bung/stopper is present. This panel is quite close to the footwell area. Water kicked up from the tyre must be getting into this hole. Luckily I had a spare bung of the correct size. Anyone know if this might be connected to the damp carpet in the footwell?