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Re: Megane II CC water in back footwell
Back seat footwell is the lowest part of the CC, it is where all water will congregate, this is also the 1st place to check when buying one, hand under the seats and feel for the carpet flap lift and stuff fingers into underlay.
This water could be coming from anywhere, you also need to check if it is rain water or coolant as well.
If there are no obvious signs of water ingress, prime place for CC is
Rear quater lite
Seal Accross roof, usually drips where the roof hindges are.
Front window seals.
Check that the front window is actually going under the seal when shut, if not it leaves a small gap where the front window and rear quater lite seal (black strip down the middle of the 2) the gap will be at the top by the roof.
Check the bulk head, under the plastic trim where the wipers are, the drian holes sometime block and water congrigates in there lots of it, usual symptom is a sloshing sound when cornering as water rushes from side to side. When it get to a certain height it comes in through cable gromets etc.
You need to mop this out ASAP as under both seats there are buried in the carpet electrical conectors for your airbags.
Check your coolant also, have a look into the hole where ht ecap is if you can not see it there then remove the plastic cover under bonnet and have a look at the container, if it is empty you may have a heater matrix leak.
Remeber also water is guided down the door seals from the side windows so make sure sure door has not dropped or seal is damaged.
Water leaks are hideious they can ten seconds or months to find depending on how cunning they are!
Currently in christopherM's garage:
Megane CC 1.9Dci 2004 & Megane Coupe 1.4 16v 1999