Originally Posted by Gonzo911

When my AC comes on there is a funky smell. Not a dead rat smell, more of a musk...and very hard to describe. Very noticeable at start up but never really goes away.

I recall my wife's MB had the same odor from the AC system and I recall someone relating it to the undercarriage coating (cosmoline maybe?). Did not have this issue with my last PCar.

Has anyone experienced the same thing?