More likely switch (like u doubt).
if not its head unit (in dash) but dont bother repairing it, as it will cost you fortune in SL600. Source another one in scrap.
hey, i have a seriously irritating problem wid my car. when i go above 80 there is a verrryyyy horrible hissing noise coming from the door i dnt knw where exact is the problem
can anybody help me.
thanx