First of all, sorry for my English.
I have a Mercedes W203 C220 CDI (first model 2001) and when I run the car in the morning or when I get back from work in the afternoon (after a few hours without using it), the car does not accelerates as it should and if I'm driving uphill it slow down even if I push the acceleration pedal completely.
If I run the car for 15 minutes or more, I turn it off and after a few seconds I turn it on again in the 90% of cases it works good and have a good acceleration.
In some cases it may get the full power itself without turning the car off when I'm using the A/C and the car is not moving (it makes a little vibration once with a small movement of engine revs) and that's the signal that the full power is restored.
A friend of mine is suggesting me to clean the EGR and that will be my next step, but first I wanted to know if someone here know something more about this issue.
Reading the codes was shown something about the Turbo solenoid pressure valve. I replaced it but nothing changed.