There’s loads of space up front and plenty of storage in the door pockets, centre cubby and glovebox.
Those in the back will also be comfortable, too. The outer two seats are a touch wider than the middle one, but three post-booster-seat children will be fine for shorter journeys, and two tall adults will be comfortable over longer periods; just fold the middle seat forward and the two outer seats slide backwards and inwards to make enough room for very lanky passengers to stretch out.
Mounting three child seats will be tricky, since the middle seat is a bit narrow, but there are Isofix fittings on each seat. You can also fold all the seats down and tilt them forward to make a huge load bay; simply folding them down will leave a massive step up in the load bay. You can also remove the seats altogether to turn the C-Max into a small van, although the seats are heavy and awkward to remove and reinstall.
The boot is a good size and will be fine for a big buggy, but there’s a step down over the load lip to the floor and there’s no variable-height boot floor; a shame, since most rivals have a floor flush with the lip and some useful underfloor storage. A lot of buyers will also want to add the Family Pack, which brings rear window blinds and picnic tables on the backs of the front seats; some rivals offer these as standard on higher-end trims.