Acceleration on 1990 Mercedes-Benz 560SEC

Whenever I start driving the car, it doesn't accelerate properly.... I have changed almost everything and no luck yet.. any idea ??

Asked by for the 1990 Mercedes-Benz 560SEC
Yes, get it checked out by a MBZ specialist and get a diagnosis.
Replacing parts hoping to get lucky is not the way to fix cars. Diagnose first.
If you want to find a Benz specialist, here's our directory link for you: