for anyone else having water leaks inside i have just found the cause of my rear drivers side footwell dampness, vw have stupidly used a very thin and brittle plastic pipe for the rear wiper washer jet and run it up along the wiring harness along the sill, this has a crack in it and was dripping water into the footwell, also causing the door ajar sensor and handbrake release switch to become faulty, just have to wait for the drips of leftover water to stop then i can seal it with something....
