W210 M112 Stall & no start - PeachParts Mercedes-Benz Forum

smharr4 · #1 01-31-2008, 09:44 PM

My new-to-me W210 decided to stall earlier today in the middle of rush-hour traffic, and refused to fire (but did crank).

I had to push it out of the main road and onto a side-street where (naturally) it started right up first time I turned the key, and the rest of the journey was uneventful, except for the CEL that's now lit up on my dash.

Is this a typical symptom of an impending CPS failure?

Johnhef · #2 01-31-2008, 09:58 PM

sounds like it. get the codes read to verify but my money is on the crank sensor.

Carson357 · #3 01-31-2008, 10:14 PM

did it eventually start? how long did it take?

smharr4 · #4 01-31-2008, 10:27 PM

Quote:

Originally Posted by Carson357

did it eventually start? how long did it take?

It took a couple of minutes (I had two people in the car with me) to push it along the main road to the next side street, and when I got it there I tried starting it and it fired right up. It was maybe 5-10 minutes between it stalling and restarting again.

It's a CPO'd car and I've barely had it a month (I bought it on 26/12/07) so it's going in for a warranty repair, but they couldn't get me in until Monday - how likely is it that this will be happening again?

Carson357 · #5 02-01-2008, 05:15 AM

Quote:

Originally Posted by smharr4

It took a couple of minutes (I had two people in the car with me) to push it along the main road to the next side street, and when I got it there I tried starting it and it fired right up. It was maybe 5-10 minutes between it stalling and restarting again.

It's a CPO'd car and I've barely had it a month (I bought it on 26/12/07) so it's going in for a warranty repair, but they couldn't get me in until Monday - how likely is it that this will be happening again?

it is likely it will happen again, i agree with possible crank sensor issue

smharr4 · #6 02-01-2008, 05:34 PM

My wife took the W210 to work, she reported that the CEL was no longer lit *sigh*

It's still going in to be looked at on Monday.

redcoupe · #7 02-01-2008, 08:08 PM

The code will still be stored in the ME control unit.
I agree its most likey the crank sensor

Johnhef · #8 02-02-2008, 12:16 AM

if you want to sort of verify it to yourself, with the hood shut, run the engine at a higher rpm for a few minutes- it will "heat-soak" the sensor and cause the engine to shut off if it is in fact the cps. It will definitly set a code if not before and illuminate the CEL.

smharr4 · #9 02-02-2008, 01:52 AM

Quote:

Originally Posted by Johnhef

if you want to sort of verify it to yourself, with the hood shut, run the engine at a higher rpm for a few minutes- it will "heat-soak" the sensor and cause the engine to shut off if it is in fact the cps. It will definitly set a code if not before and illuminate the CEL.

I'll give this a try over the weekend - thanks for the tip!

Will it only happen if the car is stationary? Would the engine shut off if the car is moving?

Johnhef · #10 02-02-2008, 08:14 AM

It can, but usually this is done in park.

smharr4 · #11 02-07-2008, 12:30 PM

Took the car in this past Monday to the dealer where they agreed with me (and everyone here) that the CPS was the most likely culprit.

They gave me a rather nice '07 C230 Sport to drive while it was being serviced, and I picked up my W210 on Tuesday, and so far no more stalling.

*crosses fingers*

Edit: 200th post! woooo!