Wow, that last post is a doozy!
go to r3vlimited.com
Make sure you search before you ask any questions, the guys can be pretty testy to newcommers that don't search before they ask.
It has a WEALTH of information on the e30. It is the largest e30 forum on the net.
I am sure you will find what you need there!
I own an '89 325i, it cost me over 1,000 to have the air fixed this summer. GOOD LUCK!!
Kristin