Hold on! Don't rush away. No really... come back. You probably think a small mid-life facelift of the Audi A6 isn't worth your time. But contrary to first impressions, this isn't just a grille-and-headlamps job. It's an all-new car. It just happens to look like the old one's very slightly fitter twin brother. The A6 is a breadwinner for Audi, so it doesn't want to change a winning formula. Ah yes, the safe-option defence.