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

mleskovar

Not knowing the year I'm guessing CPS....Crankshaft Position Sensor

OLDSCHOOLRICE

+1
Im a tech, and this sounds a lot like a bad crank sensor. Very easy to change if you have the tools. About $400-$500 parts and labor at the dealer.

seamy

its a 2000 car.......would a crank position sensor stop the car once its started and ticking over?

the car starts ok when cold,seems to be once its warmed up it wont start....

confused now..............

mleskovar

Classic CPS symptoms.

whoover

Why confused? When the CPS goes, it's heat sensitive. That's why everyone is telling you it sounds like a bad CPS.

OLDSCHOOLRICE

Yes, as the engine gets hot, the internal windings inside the crank sensor go "open" due to heat expansion.

vettdvr

Correct

seamy

would this fault show up on the diagnostic then as a cps fault?

anyone got a pic of were this is situated on the engine....


thanks guys...

whoover

It's bolted outside the flywheet, near where the engine and transmission mate.

http://www.detali.ru/cat/oem_mb2.asp...SGR=075&SGN=04

The torx retaining bolt can be tough to get to without the right extension.

I don't know if it throws a code. Normally, hot stalling with inability to restart until the engine cools is all the diagnosis one needs.

seamy

well,got the cps in on sunday and so far so good.....

thanks for the help guys....