today i was cleaning vacuum my carpet and then i find a wet place on co-driver (but i have a LHD car). Does anyone know where from the water came?The picture i borrowed from Rusty 
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Audi Coupe Quattro 2.3 20V -
The sky. Really.
Or the heater core. The S2 has what is called a "water box" under the cowl, under the hood/bonnet. It has a drain. The drain can clog and water can build up in there until it crests the edge of the water box, cascading water into the passenger compartment through various openings in the firewall (supposedly sealed but not 100%). In the case of the C4 UrS4/S6 this is a notorious cause of ECU death by drowing. I don't know the exact details for the B4 S2 but I offer this write-up about the C4 water box cowl drain as a guide for your search:
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant -
i think,that coupe havent this rubber drain valve , coupe have a holes in metal.I must look. But on passenger side under the window trim i found some box or what it is.I am trying to get off,but i cant get off the nut. I find there a few leafes.Audi Coupe Quattro 2.3 20VComment
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you say it was a lhd car? the fuse box would be above taht in the lhd car and could have leaks.Comment
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yes a LHD car, i know that the picture is of RHD car,but i want to show where it is
i cant get the nut off
the fuse box is on driver side, i have problem with passenger sideAudi Coupe Quattro 2.3 20VComment
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Where's the pollen filter/housing on a LHD? I know that when mine (RHD) had water inside it was getting in through there, caused by the trim that runs long the bottom of the windscreen not being fitted quite right.Shocked, exhausted, hosed, bushed, dumped, chipped, mounted, filtered, gauged, packed, intermittantly wiped and braked. I mean broken. Now, about the car...Comment
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Search for "leaks", there are quite a few threads
Current-2004 Impreza PPP wagon
Sold-92 3B coupe-RS2+, 996s, konis, rear torsen, forged rods........
Sold ABY-stockComment
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thanks andy10v
i am looking to around this hole and found a few cracks, i dont know if its the place where are the leaks.So i clean and then paint it . On the drives place it looks good,no cracks and no dirty,so i just paint it too
this week i want and try to get out a carpet and see it,how its look like and from where,water came from,but i hope,that it will be from the cracksAudi Coupe Quattro 2.3 20VComment
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