seamy

hi there....my first post and not a great start to mb ownership...

my s500 v8 wouldnt start for me today,it will turn over ok just not fire,then i let it sit for about 5 mins opened it as normal and it started first time,had a drive around the coast and was dropping a friend of at his house,we were sitting in the car with it ticking over...and it just stopped...now it wont start...anyone experience this? any help would be appreciated.....

thanks in advance.

seamy

bronxballer

what model year do you have?

Gondon

prob 2000 haha

seamy

yeah its a 2000 whats so funny??

winmaw

Check you CPS (crankshaft Position sensor). It is DIY item. Use search "CPS" and will find tons of information.

winmaw

Check your CPS (crankshaft Position sensor). It is DIY item. Use search "CPS" and will find tons of information.

Gondon

Its always 2000 for some reason

my06clk

Go witht he obvious first. WHen was the last time the fuel filter was changed? how is the fuel pump? wit a bad CPS ur car will not run at all OR give a C/e light. Low fuel pressure will also but only in certain conditions.

whoover

90% of the time, a bad CPS is temperature-sensitive. Car stalls when hot, won't start until it cools. Concensus on the other thread OP started is that it's classic CPS symptoms.

AH1W-COBRA

hey gondon,you got to chill your kick them when there down responses.i have recomended this forum to alot of other MB owners telling them that the info that you can draw from this site is priceless.here is a new MB owner who is asking for tech info and you kick him in the teeth about the year of his car.cheer up.

my06clk

Well this may be the case and I can see your point. BUt I think I understood that he had this issue at first start..

My car started doing the same thing, then it got more and more frequent. I pulled the fuel filter and I have never had the problem again. That's why I said go with the obvious.

While 90% of the time the CPS may be the culprit, you will find that the Cps because it is linked to the emission system will also set a code 90% of the time.

Hopefully he'll get to the shop an enlighten us all..

winmaw

While 90% of the time the CPS may be the culprit, you will find that the Cps because it is linked to the emission system will also set a code 90% of the time.


I don't get it. How does it link? someone please explain to me. I would like to learn.

my06clk

THe keyword is "Sensor" meaning something is reading it and acting ont the information the it is sending. This would be your ECU.

Since there is only one CEL which is yellow there are no critical or non critical status bit sent from the ECU.

When the CEL began to appear on cars in the 80's it was tied exclusively to the emissions system. As engine management evolved over the years, this same output has been used to identify engine management isuues as they indrectly relate to the emission system. THe CPS is one of those components.
Indication of a failure is conditional, hence the 90% instead of 100.

BTW manufacturers have been prohibited to have a red CEL because this means a critical problem exists and the car should be stopped.

Brake, Alternator, Temp, are considered critical faults therefore they are red.

I guess lack of forward thinking on the part of the Auto industry is the blame for the bundling of all of these items that trigger a yellow light.

I believe some of them should actually be red and I am sure they would love to but its too late now...

Z06EATER

gondon is not really tryin to **** you guys off but remember tha's the first year they brought out the W220 so that was like the testing year u kno? things have been updated and upgraded in the new models but yea, they are still good cars, thats the reason i went for a 97 C36 instead of a 95 mostly because it was the last year and they have already takin care of most of the recalls u know? like the hiring harness those had