Quote:
Originally Posted by sarthur9
Thanks to each of you for taking time to respond.
My car is a 1987 300E with 160,000, I have driven it for 8 years. Fist time it failed to start I took it to the MB dealer, they replaced the fuel pump and OVP relay. I left the shop and got about three miles before it cut off at a stop light. They came to pick up my car and it cooled down and started before they loaded it up. They kept the car for two weeks and said they could not get it to repeat the problem.
It has happened (drive a short distance and fail to start) about a dozen times since 2003, sometimes 8 months between episodes. In the last week or so it has become hard to start, and cut off once about a mile from home. I have replaced plugs, wires and cold start valve in the last six months.
Where is the crank position sensor and OVP relay located and what do they look like? Thanks, Steve
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Parts of this is sounding more like my problem. My car died once in the middle of traffic, and a AAA tow truck happened by so he picked me up and dropped me off around the corner on a side street. The car then started right up. I've read that the cold start valve is very hardy and not prone to failure. Your hard to start problem sounds different though. When my car would start, it would start. When it wouldn't start, nothing would help except waiting an arbitrary amount of time. Check out Fastlane under "engine electrical" and further under "reference sensor" and see what these things look like. You should have no problem finding it on your car. On my newer 2000 C280, it is just a sensor clipped to the harness, on the front of the engine and the rear one is by the firewall by the brake booster down in the bell housing. On my 1991 300CE the front one is right in front and I've never had to mess with the rear one. The front ones are just plug and play, very easy. The rear ones take fiddling time but still quite easy. I was also told to check the fuel pump relay, but this was not the problem.
glenmore
1991 300CE
1990 LS400
2000 C280