Wet carpet in rear footwell

[tdi03]

I own a B5.5 TDi 130, and after 6 months of ownership its starting to show up some problems.

I've just noticed that the rear passender side footwell is soaking wet! I seem to remember reading somewhere that this can be common on Passats.

Has anyone else had this problem? Where is the water coming from?

My front passenger elec window has just started to play up too, could this be due to the leak causing the electrics to fail?

Thanks