Hello!
I recently bought a 2009 Mercedes S211 220CDI with an engine problem, the recent owner didn’t know what the fault could be. And it happened when he let the car sit for like a year. When he tried to start it, this fault was there.

The problem with the car is: it misfires, runs badly, it happens basically nothing when you press the gas pedal, when it gets hot you can rev it little better, but not over 3k rpm, the engine also just stops randomly.

I have changed the diesel in the car, and the fuel filter without any success.

I get different fault codes every time I read them, but the most recent ones is : P203D, P204F, P204C, P204D, P204E, P20D3.

Does anyone have a clue what the fault could be? Please let me know!

 

I have a hard time trusting a scanner that says:
"react immediately" to STORED faults.

In the means time clear these codes to compare what comes back. You should be concerned with CEL

there seem to be a standard issue with your camshaft.
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I’ve checked the codes agin, and cleared the old ones, P20D3 is the one staying, the car died like 4 times when I checked the codes, good to mention also is that it doesn’t have an Check engine light, I have zero warning lights in the dash.

 

If you tryst thus scanner it points to your tranny CAN Bus-C having networking issue and likely why the engine quits because ECU relies on the CAN-C for data.

Can you interact well with the ECU Module with your scanner ????
Trying to understand which module is causing your CAN-C troubles. ...

You confirm having decent Chassis voltage near 13V or higher?