Questions about A4 maintenance? I just D/L the maintenance schedule from AudiUSA.com...
 

What is:

Plenum Water Valve - clean <-never heard of that valve
W/W System <- what is W/W?
Trans Final Drive(S) - check lubricant <- is this the differential?

Also, how are we suppose to lubricate our door hinges? My driver's side door is sqeaking like crazy right now. Tried silicon lube, but it doesn't change it.

Thanks for the 411!

WD40 for door hinges worked for mine
 

W/W =windshield washer? Just a guess though. . .

i used silicone spray last nite and the sqeeking went away, there are 3 areas to spray.