Having endless problems with the drive of my new car which is a 620d GT M-Sport 69 plate. In garage now for the 2nd time. This time it has been with them 2 weeks and now they are saying there is nothing wrong with the car and the problems that are happening are due to the 'SAILING' function on the vehicle. I have my limited knowledge and experience on this but would like comments from anyone on here as to what 'SAILING' means on a new BMW and what one should expect it to do. (problems I am having: (1) automatic gear changes in the lower range very jerky i.e. when approaching roundabouts, junctions and then accelerating away, (2) rpm's when driving at 1,500-2,000 suddenly for no reason will jump up to 3,000-4,000 rpms with an increased engine noise for about 10-15 seconds and then settles back, and (3) drive of car at speed on a motorway doesn't feel 'grounded' like when overtaking a lorry/coach and you have to hold steering wheel) makes for a very tiring journey!