thank you all for your replies. The dealer changed all 5 injectors (warranty) - now its runnig like a new car.

I have now tried the "tonic" - no change.
The engine is still misfiring - worst after app. some 15 miles driving. It also seems to misfire when I give a little more gaspedal. Especially around 1700-1800 RPM.

I live in Denmark, and has imported this vehicle. All software has been updated to the latest version. All 5 injectors has been changed recently due to heavy vibration at low RPM (around 900, and especially heavy vibe when also braking!) . Problem: No error messages shows up. Problem most distinct w...