No the car drives fine compared to other 4 cylinders I have driven. Not the fastest one of the bunch. I have been curious about the performance with what I have read about this car and mine is not that strong at low rpms and going up a hill this car has no power. I have never driven Mercedes and I have nothing to compare to. It has a new air filter and new plugs. I’ve ran some fuel injector cleaner though it but it didn’t seam to change any thing. I don’t know how to check the fuel pressure. I just bought the Haynes repair manual and I will look for it when I get home. From what I have read so for the manual doesn’t cover as much as I had hoped it would. Thank you for your post.