Bigpapistu

Ran into a ESP problem. I got a flat last week in the rear passenger side and put my spare tire on. The spares tire size was 225/40/17 and the other rear side was 245/45/17. I kept the spare on for about 4 days and in those 4 days I was getting a "Visit ESP workshop" message and the car barley accelerates and will hardly go past 2,000 rpms

I finally got new rear tires and put the right of psi in them and no ESP message that whole day. The next morning I wake up to go to work and after 5 minutes of driving ESP message comes back on.

Took the car to a local mechanic that I trust and has worked on my car before and they pulled up a steering angle sensor code. Those things are expensive! I decided to go with a used one with the same exact part number..changed it myself. Out goes the old in goes the used and now I get 2 different messages...1.) ESP not available 2.) SRS message

Somebody told me that it has to be programmed to my car but I don't know. Anyone know what is the real problem?

Sickooli

try this, put the original sensor back on and then start the car,if the esp comes on again, turn steering wheel full to the right and again full to the left.

Bigpapistu

I did put the original sensor in and tried the steering wheel thing many times. I think once the sensor is removed, even if you put the original one back on it has to be reprogrammed. Supposedly it's not too common for the sensor to go bad..

Sickooli

ok,take off the negative from the battery wait ten minutes, and do the steering wheel procedure again.

Bigpapistu

Didn't work. I had the new steering angle sensor programmed and re calibrated and nothing. I did take off my whole intake system and put it back on and all of the sudden after driving for 5 mins the car got its power back. Now the next day no power again. Thinking a vacuum leak is the problem or the throttle body. Also my valve cover gaskets are going to need change and that can be causing it also. Won't know till someone here helps me out or I just keep trying to fix things little by little

insame1

You can keep shotgunning parts at this or go get a diagnostic scan done.

johnng117

It electrical for sure, I have 2 years of headaches and it was 95% electrical. The garage told me to change this and that actually almost everything and the car was still unreliable it would die anytime. Finally I took control and changed the whole engine harness and cleaned all earthing points and sealed them and the car has been good these last 4 years and I sold all of the items I bought for the car, got back over $1500 from parts.

macbryanie

Once you read the codes if it is p0120 view post #41 has the parts etc - it cleared my electrical issues when i had the car (WOT cut out - lumpy idle surges etc).
https://mbworld.org/forums/c32-amg-c...y-p0120-2.html

Bigpapistu

No codes, the only code I got was a steering angle sensor and that was fix and still ESP is on. Last night I took off my intake system to just look around. Decided to clean the breather hose for some reason (it had some oil around it and inside so I decided to clean it) I put it back together, drove the car and I stepped on the gas all the way (after 2,000 rpms) the car went up to 3,000 rpms and all of the sudden got its power back and took off like it should. The car started driving like normal for the rest of the day then as I'm coming home I get ESP message again. Woke up in the morning, cleaned the tube again and did the same thing after 3,000 rpms. Worked for a couple hours then came up again. At this point I've spent countless time and money on diagnostics and stuff and really don't feel like paying anymore for no reason and nobody being able to figure out the problem. For now I'm going to change the valve cover gaskets and clean the motor out really good and see what happens from there

insame1

I know you said you have paid too much in diagnostic fees but have you take it to the dealer or someone with star. I found that reading the printout from a star set up will point to your actual problem.

johnng117

If you don't take it to a garage with a proper code reader like STAR you are just guessing and don't expect it to be reliable, you be just leaving things to chance.
I had my car check with STAR from day 1, and not all the time the STAR is correct you have to take the codes and judge for your self like a good doctor.
Without STAR you can get lucky.

Bigpapistu

Today ESP worked for about 10 minutes. I decided to have a little fun and do some burnouts. I noticed that my left rear tire wasn't spinning at all and my right one spinning like it should and making all the smoke. Below is a picture

Bigpapistu

UPDATE: valve cover gaskets fixed and still same problem

Took it for a STAR and supercharger code came up. Didn't exactly say what it was though. He told me he's going to have to remove the supercharger and check sensors and the supercharger itself

I still believe it has something to do with air or vacuum leak. Probably from the crankcase tubes or the tube that connects the intake system to the valve. I cleaned those 2 different times and the car ran like it should (there was oil inside the tubes) but now when I do it no more luck...today I put hose clamps on all 3 tubes, cleaned the throttle body, and sprayed electric contact on the plug and the harness... it seemed like it was trying to catch its power but eventually gave up and ESP message came back on.

Some people here have said they have changed the hoses and the tubes and worked for them

johnng117

I hope I'm wrong, but I quite certain it's nothing to do with the mechanical parts it's electrical so removing the supercharger will not help it sounds like a guess to do something.
I've worked with 3 C32 and what worked well for me is changing the harness and making sure the ground is good, these cars are old and the W202 are prone for harness problems so I guess the w203 is better but still has its faults. The harness is the main connection with all the sensors so think about it..

Bigpapistu

Can loose spark plug wires cause this or if they hey oil on them?

Bigpapistu

UPDATE: ESP problem is fixed..pulled off a sensor on the left side of the supercharger pulley. It was covered in oil, cleaned it off and now working as good as new. Thanks for trying to help guys!