Weird Blower Motor issue with my W140 S500 please help - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 06-18-2012, 11:12 AM Thread Starter
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Weird Blower Motor issue with my W140 S500 please help

Hey guys I have a 1995 S500 Sedan.

Just got the motor running perfectly (replaced harness distributors rotors plugs etc)

OK now to the problem, the AC blows cold but whenever i turn it on the Blower motor constantly drops to low speed than back up to full speed than back to medium and low and back up. Basically constantly jumping around on its own.

I would love to get this fixed and I was just wondering if anyone has experienced this or knows what the problem is and where In the vehicle the troublemaker is located.

Replies would be greatly appreciated.

Thank you very much


1995 S500 Sedan W140 148k miles running great
2007 550i BMW E60 (Weekend car)
2001 Audi A4 1.8T (Gas Saver)
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post #2 of 3 (permalink) Old 06-20-2012, 05:43 AM
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The blower speed regulator and it sits on top of the blower motor, it is a small black box.


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post #3 of 3 (permalink) Old 08-09-2012, 07:29 PM
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