Intermittant Starting - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 08-30-2014, 01:35 AM Thread Starter
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Date registered: Aug 2014
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Intermittant Starting

I have a manual 1999 Mercedes c180 and since I've owned it, one and a half years or so, it has had a problem where it won't start, whereas it did ten minutes earlier for example. It sometimes will crank and start then stall itself at around 1500rpm, other times it will just keep cranking but won't start. At first we thought it was the fuel pump but have had that replaced and made no difference. It's been a lot worse recently and I'm trying to sell it so need to get it fixed, does anyone have any ideas?
Kelsie Sinclair is offline  
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post #2 of 2 (permalink) Old 08-30-2014, 08:56 AM
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Recently, after several months of trouble-free ownership of a recently aquired 96 E300 Diesel, I experienced problems of the engine simply dying while running, and not wanting to restart. In all cases, I needed to give the car 5 or 10 minutes of rest before it would restart. The situation got so bad I was not comfortable driving family members, nor driving in heavy traffic on freeways - when it dies, steering is not assisted, although brakes will work for a while.
I tried numerous things, including the often suggested K40 relay inspect/resolder. I removed and polished every battery terminal, fuse, ground terminal, etc. All to no avail. A typical trip would be: Start normally and drive down to the store, run in, come back out, and no start - was too fast I guess. Wait a bit, and try again, and it would start.

Lakeside Mercedes Repair appears to have fixed this for $140 in parts and $73 in labor. I've been driving several days with no recurrence of the issue.

The culprit apparently was the "Crank Position Sensor" - which is mentioned almost as often as the "K40 relay" in discussions of die/no-start.
Good luck,
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