'89 569SL A/C control
 

I removed the vertical console plate to get at my radio easily and found one of the A/C vacuum lines was disconnected. There are 2 lines running to the recirculation (upper) switch which has 3 connections labelled A, B & C. The one still connected is attached to "C". Which one does the other line go to, "A" or "B"? I lean towards "A".

On another note, when the A/C switch/control module goes bad, is it fixable? Is there a particular component that goes south? I'm not afraid of electro-mechanical devices and know how to wield a soldering iron.

Thanks in advance...

Oh yeah, it's a 560SL, fat-fingered the 9.

Maybe this will help.

As the photo Walrus shows, hook it up to "B". Look at the following site for self repair on the push button control box:

http://207.210.95.34/~boostd/Climate/

Good luck!