HELP !!!!! W203 c230 03 is acting weird upon cold startup
I am very concerned lately about my car behavior. My car is 2003 c230 coupe w/70K on it now. I am having two problems and hope anyone out there that can give a tip or any help in regard:
The first problem is hapening when I first start my car in the morning, and going to drive mode. Until the car warm up, everytime I come to a stop, the car start shaking and the RPM goes down to almost 0. Sometimes it stalls and sometimes it recovers. It's so annoying ............
The second problem is with the transmission, when I slow down, the c230 with an auto tranny downshift automatically for you to help you stopping your car, in may case it goes let's say to second gear and if I decided to hit the gas pedal again, it jumps to third gear and it starts shaking same way as if I am driving a manual car and removed my foot off the clutch quickly.
PLEASE HELP,
Ed.
Pay attention to the 'bold' circles..
Last edited by mig888; Aug 28, 2007 at 02:13 PM.
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I have checked it and it looks shiny and OK.
Someone else mentioned that I could be running low on transmission fluid.
Any idea
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I had an exhaust leak with my headers, so had to go back to stock. As soon as I did that, had no more problems like this.
Have you done any mods or is your car completely stock? Are you still under warranty?
I took it to the dealer to check it up, after two days of diags, they came up with two options,
1- It could be caused by the Transmission valve
2- You should need a new transmission.
The first option of course sound like more convicing as it doesn't look at all as a tranny problem. So I asked them to change the valve and off they did.
Well nothing changed. So now I am wondeing if they even know what the hel there doing.
I still think that it could be something like a speed sensor related issue or anything else minor.
Apreciate any help.
They couldn't figure it out either. One thing they said that on these model, it can't be anything related to the vacuum system because it's driven electronically. Not sure anymore who to beleive.

So I start playing around with the pipes from the pics above and I got a check engine light now on.
Is there a way to reset the check engine light?
Help!!!!!!!
They couldn't figure it out either. One thing they said that on these model, it can't be anything related to the vacuum system because it's driven electronically. Not sure anymore who to beleive.

So I start playing around with the pipes from the pics above and I got a check engine light now on.
Is there a way to reset the check engine light?
Help!!!!!!!
Just came back from the store and the CEL went away. I moight have caused it to come up.
But the issue remain. Still at cold, when coming to a stop, the car shakes and almost seems falling apart until the temperature gauge goes above 60.
Do you hear a loud sucking kind of noise when you turn the car off, that didn't used to be there (try shutting off the car with the hood and door open so you can hear). I noticed this noise, which od course went away when I had it fixed.
Good luck!


