woodsandskins31

I need to replace the CPS on my ML. Can I do it myself or does it have to be done by an MB Tech. I heard that it has to be re-initialized by Star Diagnosis System. Is this True?

Thanks for the help.

xoy

The only problem is space :-) You dont need to do anything with the stardiagnosis. Do you only have problems when the car is hot?? (won´t start)

woodsandskins31

When it is hot. It stalls and then its hard to start.

xoy

Yes thats is a typic mall function... Replace the sensor and all your problems will be over :-) good luck

Holmes5518

You're technically supposed to set the ring gear adaptation in star diagnosis after replacing crank sensors.

mleskovar

What's the 'ring gear adaptation'? I've never heard of it or heard of anyone resetting it after putting in a CPS. If the ring gear adaptation is off what would the symptom be?

SUNILP

need a inverse torx socket and a swivel. Located on the rear of the engine near firewall.

pzsfive

Did you ever figure out what happened and the cause of your misfire? I had my car at MB for 3 days and they came up with resetting my ring gear adaptation since it wasnt reseted after replacing CPS sensor.

lito420

hello there I got my ML320/98
with misfire on 4,5 and 6 cylinder, code P0410 and ETS light on,
I been told is my Cat but wanted to know if you someone here have fixed their misfires with the replacement of the CPS Sensor?
thanks for the advise
all help is welcome

pzsfive

When I changed the CPS sensor on my 2004 S500, My car runs great but when you floor the pedal, it gets a random misfire. Basically I have heard two different opinions that comes close to the truth but the "FACT" is, you do need to reset the ring gear adaptation on the vehicle because when the CPS malfunctions, it messes up the adaptation. Some say that when you replace the CPS sensor, all you have to do is rev the engine up and down to 2k rpm but that isnt the case. The ring gear adaptation does need to get reset. I paid my Indy mechanic 60 bucks to reset it. Saved me a grip of cash replacing my own CPS. very tight space but pretty simple one torx bolt.
As far as the mifire being a cause of a faulty CPS, that wouldnt be the case. If you want to see if the cats are out, rev the engine on park slowly and if you hear a binging noise or rattling coming from the middle part of the car, then cats are out. sometimes you can hear it but sometimes you wont. depends on how severe the damage is. If the cats break apart, you might lose all power and just feel like a struggle to drive the car. sometimes only one goes out at a time. also, your local auto store rents out OBD2 sensor reader and that should tell you as well. Cats are pretty expensive so try to diagnose from the smallest parts. check wires, plugs etc. Good luck!