BenzWorld Junior Member
Date registered: Feb 2007
Vehicle: 2007 E350, 2006 E350, 2003 C230K. Previous: 89 420 SEL, 87 300E, 92 190E, 91 190E
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1986 MB 420 SEL Start Problem
I recently bought this '86 420 SEL with 174K miles. It wouldn't start, which is one main reason the previous owner sold it. I had a feeling it would not be a big problem...
Turning the ignition key, you could hear something making some noise in the engine compatment. The fan blade would roll, but car wouldn't start. Going through several forums, I had a feeling the problem was related to the fuel delivery system...
I put some gas in the carburetor and the car started briefly and then died...
Taking out the fuel pump relay and smelling it, you can smell that it got burnt.
From the forums, I decided to jumper ports 30 and 87 on the fuel pump relay. The car started right away. I left the relay on and the following morning it appears the battery went dead. Put in a replacement battery and the car started again. Right now, I have the defective fuel pump relay out of the car so it wouldn't run down the battery again. Will get replacement from a MB dealer anytime soon.