I have a 2004 VW Passat wagon which has a frustrating leak. We thought it was caused by a leaking door seal, but today we caught it in action.
The car was parked outside overnight in rain. This morning the floor was dry. The car was driven a short distance and parked on a sloping driveway which caused the car to lean to the left (slightly nose up). Within seconds there was about a litre of water in the footwell of the back left seat.
The water was running out of the bottom of the B-pillar between the front and back doors.
Where could this be coming from? Sunroof drain? B-pillar? Sill? It must be holding quite a decent amount of water.
Can anyone familiar with VW Passats tell me if this a known/common fault? If so where is it holding water, and what is the solution.