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Durkin Tactical Franklin Armory
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Posted: 12/18/2010 7:16:07 PM EDT
I have a friend with a 99 E430. He takes very good care of it and has it regularly serviced. It is not his daily driver. His problem is that he can drive it for a while get out, shut it off. Then try to start it and all it will do is turn the engine over. He will have to wait awhile then it will fire up like no problem. He wants to try to isolate the problem without having a mechanic replace every sensor on it before he finds the correct one. Any help or input will be appreciated.

No service or check engine lights come on.
Link Posted: 12/18/2010 7:24:18 PM EDT
[#1]
fuel pump?
Link Posted: 12/18/2010 7:25:32 PM EDT
[#2]

Quoted:





I have a friend with a 99 E430. He takes very good care of it and has it regularly serviced. It is not his daily driver. His problem is that he can drive it for a while get out, shut it off. Then try to start it and all it will do is turn the engine over. He will have to wait awhile then it will fire up like no problem. He wants to try to isolate the problem without having a mechanic replace every sensor on it before he finds the correct one. Any help or input will be appreciated.









No check engine light?  No codes?








Mass air flow sensor is where I'd begin. Next time the car fails to start, open the hood and unplug the air flow sensor.  Then try again.  If it has a backup MAP, it'll run.  












Clogged catalytic converters can do that crap too.  It certainly seems like an air or fuel problem.  



























 




















 
Link Posted: 12/18/2010 7:39:04 PM EDT
[#3]
I'm not positive with that particular model and I'm not a Mercedes mechanic,  but I have done some extensive work on them. My Mercedes Had a similar issue,  It turned out to be a bad cold start valve.
Link Posted: 12/18/2010 7:44:29 PM EDT
[#4]
I work in an MB parts department.   My first guess would be the crank sensor.
 
Link Posted: 12/18/2010 7:44:52 PM EDT
[#5]
just for giggles check that the gas cap is tight
Link Posted: 12/18/2010 7:45:06 PM EDT
[#6]
Take it to a autozone and have them pull the codes.

Next take those code and google Mercedes E430 and the codes. Chances are there is a forum out there that will tell you what the problem is, how to test for it and how to fix it. That is what I do with my car.
Link Posted: 12/18/2010 7:46:15 PM EDT
[#7]
One of the Mods in the car/bike forum is a MB tech..might wanna try there.
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