This is my third A7 (61, 15 plates) and had it for 10 months and 30k miles. Its a business car and I ran the others for 140k plus miles, and just get the non quattro as it does fine on the motorways (Co2 BIK tax puts me off!). Not read everything in this thread but this one does have more issues than the other, my points:
- Worst thing the lag - I've been stranded joining busy roundabouts, with the nose sitting in the outside lane.
- Boot lid dribble - when it rains and you open the boot lid, two streams of water run into the edge channels of the body (spoiler area i think). When its windy it blows into the boot area.
- Boot lid clunk - sometimes bangs and creaks when opening
- Random seat setting - driver seat moves fully back rather than finding your setting
- Rattles - not terrible but mine comes from the console
As other have said, the dash and some of the gadgets are great and really work. Love carplay, sat nav is fine and the heated non spraying wipers are much better. I have its second service soon, will see what the dealer says