The Audi A6 Avant is a comfortable, quiet and technologically advanced estate that's beautifully built. A BMW 5 Series Touring is better to drive and has a more user-friendly infotainment system, though.get the best price
Trim: S6 Vorsprung
Upgrading to Vorsprung trim adds 21in alloys, keyless entry, heated rear seats, a panoramic sunroof, soft-close doors, adaptive cruise control and black ash interior wood trim, but it also carries a huge price premium, so we wouldn’t bother.
Engine: S6 TDI 349 Quattro Vorsprung
A bespoke sporty version of the A6 with an even more powerful diesel engine than the 50 TDI. It's pricey, though.