Hi, I have a w210 E230. a 4 cylinder 2.3 which I assume is identical to an older W202 Cclass. (re-posted)

Before, the car would not start with the starter turning and with a strong battery.

Replaced the fuel filter and fuel pump. new air cleaner. All parts are MB Originals.------- everything went back to normal.... until half a year later.

Now, when in traffic, the engine just shuts down. But it will start once you turn the key.

Also, when making a slow full turn, the idle drops a bit and then the engine shuts off.

I also noticed that The idling is a bit unstable. When you press the accelerator and release it, the tach needle drops to about almost zero then regains to its normal idling speed.


What do you think is the problem of the engine? Something to do with my idling? dirty fuel?

Thanks for any help......