ALL of the above cause problems! ON some models from 1993 thru 1995 the relay itself was defective due to poor quality control at the factory, cheap diode & BAD solder connection.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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