somehow nobody can help!!!!!!!!!!! but this clear symptom would have to say something to a cross-brand specialist here ??!! with my 996 I have for a long time now an increasingly noticeable speed change. with the normal acceleration you notice a slight pulsation in the thrust. then you drive for example constant 50 or another speed the speed varies always rhythmically by 200 upwards and again downwards. also clearly on the motor sound tubeable. over hundred does not occur at all and even at full speed it works without problems. what can trigger such a thing when automating ????