Once upon a time, whilst Mercedes and BMW were attracting critical scorn for their new styling directions (some deserved, some not) over at Audi they couldn’t put a foot wrong. See how they treated the rear side shutlines on the A2. The front wheelarch blister is defined by an inset crease. The rear blister appears the same but, so as not to spoil the balance, the rear door shutline is continued all the way round the arch – the blister is a separate panel. See also how the A pillar flows all the way round to the rear without any door cutouts in it. All the side glasses have the same size border trims.
No car is perfect, but there are other little details here that, in less careful hands would have been compromised. The end result would have looked almost identical from the other side of the road, but it would never have impressed in the subconscious way the A2 does.