HI,

2015 2.0 TDI Technik 150hp 8 speed

Had car aboutt 3 weeks, 97,700 on it, when picked up, now just over 98,000 can see ATF was done at 40,000, regular serviceing every year upto 67,,000 on avg only 5-10,000 miles per year, then in 2022 jumps 20,000 miles no more service records or documentation, Trader states with reciept OIL change and fluid top ups & 12 month mot before I pickup (400mile round trip), not sure can trust them.

Ive had ATF & Filter changed, got DPF light on so took for motorway spin, but when I use paddle to drop gear it would shift back in normal auto mode D/S depending which I was in within 30secs, would not hold manualy gear.

Car drives and shifts without any jerking is nice and smooth dosent appear to slip when changing gears, have noticed when warm there is a slight hesitation when setting off.

No Error Codes for transmission .

Any ideas

Surely the gearbox is DSG not CVT?

The lack of service records for 20000 miles means either a service was missed or it was done at a non Audi garage. Add that to the possibility of an expensive gearbox fault and I would be inclined to reject the car before the 30 day limit is up.