I have a 2012 A6 Sline 2.0 CVT. Ever since I biught the car the odd time it shudders when taking off. Like it is going to stall but doesn’t. Normally happens uphill or if i put too much gas on from starting off. No problems through the gears, and doesnt happen if i start downhill and put the foot on the gas. Today on a hill it stalled. I have had the gearbox serviced by Audi and they said it was fine. I have read several threads on different sites of what it could be or might be but no one has had a solution. Ive read that its the gearbox, the spark plugs or that its characteristic of a cvt box. Anyone ever have similar problems and how did you sort it?