if drivers is wet could be the electrical box under the scuttle

water_zpsefcbb021.jpg
 
Heh, yes did my scuttle cover like that. Works a treat. Now of course my bonnet release cable has water running down it and had a good 2cm in the rear passenger footwell this morning. Was the front door - that's all 4 done now!
 
Can also come down the bonnet release cable so cover the grommet next to the box in the above pic.

Also the pollen filter casing can leak.
 
Gotta do my front drivers door tomorrow. Been thrashing it down all day, got stat to do later in the week too..... Bloody 20vt engine. Had to do the same on my old mk4 GTi when the Cold came