Originally Posted by Londonmark

So, On Christmas Eve, my windows steamed u when I parked the car after an hour drive following the audio stopped producing sound and the dash display said: "unknown audio source" and I discovered wet REAR carpet on my 991 c2s CAB. I left it alone yesterday whilst I ate, drank and was as merry as I could be knowing there was a problem with my car, but today I pulled out the rear seats which were dry underneath, the front driver's side (remember this is a RHD UK car) and the carpet which the 2-inch thick foam on the underside was soaking wet in the front and rear. It's worth noting that the upper side of the front was dry to the touch despite my feet being on it whilst driving yet the rear footwell was wet to the touch despite nobody having been in there in months. The worst part of it is that the amp which is under the driver's seat was wet. I have taken that out and I checked the passenger side which seems to be dry front and rear. The carpet is now hanging in the garage drying out.

The annoying part is I can't find the source of the water.

• I have checked with a hosepipe, both the drains under the clamshell each side of the rubber seal it sits on both side of the car. They were not blocked and there is no evidence of water coming-in directly under the rear seats.
• I haven't yet managed to get access under the metal base of the rear seats where there is more as yet to be identified electronics and which the rear wheels arches back directly onto.
• I have also checked the water is draining off the front screen in the way it is intended which seems OK as well.
• I have also used the hose on various seals on the front firewall without managing to produce a leak.
• The final potential culprit is the A/C drain which in a RHD UK car runs under the carpet from the top of the transmission tunnel down to the base of the floor pan in the driver's tub. It looks OK to me and I disconnected it at the top and blew down it and it was not blocked.

For now, I have left the carpet and the rear seats out of the car (its a bit like having a GT2/3 right?!) and I have run a barrier wall of silicone across the driver's tub from left to right of the car. We are waiting for Storm Bella tonight in the UK so I am hoping to see water accumulate one side of the silicone wall or the other to give me a clue to the source of any leak. Failing that, I am going to drive around with the A/C on to see if that produces any leak.

Anybody know a UK based place who might be able to repair my flooded amp!?