hi all,dont know if anyone knows about dervs but i have a reacurring problem.when driving the car slow out of my drive at about 1500rpm to 2000rpm i get a really nasty kangaroo hopping until i go past this rev range,also when trying to hold it at speed say 30 it does this again,its like wanting to go then hesitating,very jerky.been to vw 8 times now, last time this afternoon amd there still saying no fault codes shown.so they dont know what to do with it.its really bad,its got to the stage where my family where in it today and me and the misses nearly lost our teeth going through tescos and the kids r now wearing neck braces only kidding but it is quite a violent jerking.any help would be greatly received