Hello all,I need guidance/advice. My Audi A4, 2006 with multi tronic transmission jerks whilst I am driving. This started a few weeks ago and it was a minor jerk at first, if I am driving, I could feel a slight jerk/shudder at gears 5,6. I thought it may be due to the cold weather or bad diesel and perhaps the fact that I only drive it at weekends- rest of the day its parked on the drive. I then filled up with premium diesel yesterday.However while driving home the jerks/shudder became constant and the car could not go up a hill. I called breakdown and after diagnostics were run, was advised that there was not error code displayed, engine runs ok and should ring Audi as it may be the transmission problem. Have called Audi and booked in on 6th January. The car has a full Audi service history although I cannot recall whether the gearbox oil was changed at 40k- I purchased it second hand at 60k. I will be most grateful if anyone could advise on what may be the cause? I am dreading if its the multitronice issue which if you google, it suggests that Audi has a massive problem there. I cannot recall that the transmission oil was changed at 40k as I bought it 2nd hand at 66k and the service book does not indicate such. Any guidance/advice most appreciated. Oh, Merry Christmas and Happy New Year!