I have been having problems with my heating and cooling system for a few weeks. We found some leaks in the vacuum system that were causing issues, but we still weren't getting ac to work anywhere but on defrost. We checked the servo (from a post on the site) and it appears to be the problem... however my mechanic gave me a part (1980 300cd) that doesn't look like any ac servo I have seen. It's a cylinder looking piece as opposed to more boxy. I can post / send a photo... I do know when its out my ac/heater doesn't work at all.

Is that an older servo or something else... I'm was going to have it rebuilt.

Thx,

Rob