E500 W211 Engine start and cut out problems

ama singh

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Help please, would be grateful for any recommendations or advice:

My car starts from cold (at least so far) and never let me down, last week I switched off the engine in traffic and when I went to re-start i noticed that the engine seem to crank over for much longer than usual but it started, then again a few days later I switched it off and tried to re-start it again within 10 mins and whilst it cranked over it refused to start. After several attempts it still did not start so I left it for 1 hour and then tried again, this time it started no problem.

I've had this failure to start now a few times and it happened again to me today at a drive through, this time the engine was running while I was waiting in traffic and then cut out and refused to start (cranking over but not starting).

30 miniutes later I tried to start it and it started no problem, I drove home 3 miles and then it cut out again while I was reversing in to my drive - now it does not start
 

mattuk

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So it fails to start only when engine hot?


When u cranking over does the inside lights,cluister and front lights dim?
 
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ama singh

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So it fails to start only when engine hot?


When u cranking over does the inside lights,cluister and front lights dim?

SO afr yes, typically when engine i swarm - i've not experienced it not starting from cold.

Lights are all good and the cranking seems to be fast, when it has failed to start I have cranked it over several times before decideding to leave it and then returning to it after 45-60 mins, then it starts no problem.
 

mattuk

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It sounds like u need new camshaft position sensor. About £60 in eurocarpars.

Someone correct me if i am wrong
 
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ama singh

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It sounds like u need new camshaft position sensor. About £60 in eurocarpars.

Someone correct me if i am wrong

How can I test the one on the car? could you tell me where to find it please?

I was also wondering if it could be the fuel filter, I've had the car for > 8 years and don't recall ever changing it.
 

Triv

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It sounds like u need new camshaft position sensor. About £60 in eurocarpars.

Someone correct me if i am wrong

Camshaft or crankshaft?
 
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ama singh

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Gents,

I've got a CPS and fuel filter - just need some guidance please on where they are located are on the car so I can chnage them over and see what happens.

We can but try.....
 

alexanderfoti

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Crankshaft position sensor is most likely culprit not camshaft.

Crank position sensor is located on the bell housing at the back of the engine.
 
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ama singh

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Crankshaft position sensor is most likely culprit not camshaft.

Crank position sensor is located on the bell housing at the back of the engine.

Do I get to it from under the car? or can it be accessed from under the bonnet?
 

alexanderfoti

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Under bonnet is easier

top right if you are standing over the engine

see number 5:

P2lzL8m.png
 
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television

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Yes CPS for this fault, I had to lay on the engine in mine to get to it and do most by feel, only the one screw and over the starter motor
 
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ama singh

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Gents,

Thank you! I will go and change it now and report back results
 
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ama singh

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Gents,

With the aid of the picture and your notes I was able to quickly change the CPS, thank you!

The one I took out had some oil on it and I could see a few metal debris on the end of the orginal sensor - not sure if the metal debris may have been causing the issue.

Have been for a drive to warm up the engine with a few stop starts of the engine and so far it looks good - will post another update in a weeks time to confirm.

Once again thank you!

If possible I would be grateful for a similar picture to show me the location of the fuel filter on my E500 W211, may as well change this over now that I have a new one at hand.
 

television

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Mu 3 pin one for my CL was only £23 from MB the Bosch versions are cheapest from Bosch service centers
 

alexanderfoti

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Gents,

With the aid of the picture and your notes I was able to quickly change the CPS, thank you!

The one I took out had some oil on it and I could see a few metal debris on the end of the orginal sensor - not sure if the metal debris may have been causing the issue.

Have been for a drive to warm up the engine with a few stop starts of the engine and so far it looks good - will post another update in a weeks time to confirm.

Once again thank you!

If possible I would be grateful for a similar picture to show me the location of the fuel filter on my E500 W211, may as well change this over now that I have a new one at hand.

Sorry, nearly missed this, Will have a look
 

alexanderfoti

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Just realised, the fuel filter is in the pump, in the tank.

If you aren't having problems then I wouldn't change it :)

Sent from my GT-I9505G using Tapatalk 2
 

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