I have the exact same problem.
Some additional information:
It occurs mostly at high loads, i.e.
- high speed (150km/h) after a longer period of driving in the 6th gear and then trying to accelerate a little
- this is especially typical when using the cruise control (tries to accelerate on a slope)
- when driving in the mountains and climbing in a gear that appears to be to high (3rd in stead of 2nd)
Also after a break (petrol stop or a bit longer) and then accelerating again on the highway.
Any help appreciated!
Ferry