Hi, I did not find an answer after searching for a bit here, so I have to open a topic and hope somebody can give me at least a hint....

I own a 1990 300e and the blower fan ONLY works when the car is shut off, as soon as I start the car the fan stops running....

What might be the cause? Battery or the ghost in the machine ? A shortage I would exclude, because otherwise it would not run at all or only sometimes, but it does it EVERY time....

Thanks in advance for the help....