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Old 01-09-2002, 05:01 PM
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Smile Finally found problem!

Back on November 13, I posted a question about my 89 300SE that would start and immediately die.

Every time it was towed to the shop, it ran perfectly for the "Doctor." On a cold night right after Christmas, it had run for an hour and half (long commutes in Atlanta) and then died, for the third tow!!!

Problem was a faulty fuel pump relay....the dead one was made in Austria...the replacement was made in Germany.

So at last a solution to the dying problem.

Many thanks to all who offered suggestions.


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Old 01-09-2002, 10:10 PM
Senior Member
Join Date: Jul 2001
Location: San Antone
Posts: 408
Glad to hear you found your problem! Intermittent electrical problems are one of the hardest to diagnosis/find. Give yourself a pat on the back and now others who may have the same problem will know where to look for a fix. One time I had a short - drove me nuts trying to find it until I discovered it was layer short in the main wiring harness. Replacing the main wiring harness solved the problem.

America: Land of the Free!

1977 300D: 300,000+ miles

American Honda: Factory Trained Technician & Honor Grad.
Shop Foreman;
Technical Advisor to Am. Honda;
Supervisor of Maintenance largest tree care co. in US for offices in Tex.
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Old 01-11-2002, 05:57 PM
blaubenz_mb's Avatar
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Join Date: Sep 2001
Posts: 52
Ah, the sweet success of victory! Congratulations!! It's not a comforting feeling to hear your Benz grinding and not starting. I know all too well, the same thing happened to me last October. I parked my car and then when I went to start it again, it didn't start. It just sort of ground and ground but no start. I tried two more times and just when I thought I would give up and call the tow company, I tried one last time and it started right up. I immediately drove it to the nearest MB mechanic who diagnosed and did something to it and told me to drive it for a couple days and if it didn't act up bring it in and he would replace the relay. That fixed it. The scary thing is that it gave no warning signs, is there anyway that one can know that the relay is about to go?
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