Just got my first Mercedes, an '89 300e. To be brief the blower motor wasn't working and I was told by a well-respected local Mercedes tech that it was shot and the job would cost $500. Bought one on ebay for $75 and my mechanic discovered it was only a bad ground. He fixed that (leaving orig. blower in). Now it won't go off. The controls don't seem to do anything (climate control dial DOES change temperature, though) - no manual so I don't know how to operate it anyway.
Any theories?