1.0 ALL, Ruckeln while speeding up to motorway ride

Good morning Motor Talk , I have a small problem : If I have driven my 1.0 Lupo ALL 200km motorway 120 – 130 km/h and then drive on a highway or into the village sometimes 2000 sometimes from 3000 rpm the engine starts to jerk strongly. Sometimes one is almost afraid that he runs out At the same time with the jerking spins also the speedo jumps from e.g. 60 to 20 km/h back and forth. I have just sat down a little bit but found nothing exactly where the problem is described is similar it is like here : http://www.polo6rfreunde.de/…/ I have already looked at Maderbisse or other “damages” at the ignition system to see nothing. Thank you for the help already, Lukas