There’s plenty of room for tall drivers to get comfortable and you don’t feel too close to your front passenger. There are only two seats in the back of the C-Class Coupé, but they’re sculpted to be quite comfortable and two average-sized adults will be fine for most journeys.
It’s a bit of a squeeze to clamber into the back (avoiding bumping your bonce on the low roof), but access is no worse than key rivals. If you do regularly carry adults in the rear, it’s worth bearing in mind that both the Audi A5 and BMW 4 Series are marginally roomier.
Usefully, the back seats split and fold 40/20/40 to leave a smooth but sloped load bay. This means you can load longer items through – provided you can negotiate the narrow opening between the boot and rear passenger space. Again, the boot itself isn’t quite as big as a 4 Series' or A5's, but it is deep and practical enough by coupé standards.