a/c makes hissing noise, doesnt blow cold
a couple days earlier my a/c worked fine, then it wasnt cold at all anymore and there was a hissing noise coming from the center vent.
the blower works and so does the heater.
could the hissing be a vacuum leak? how would a vacuum leak in the a/c affect its performance?
could this just mean im out of refridgerant?
1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350