The GLC’s better for carrying three adults in the back than most mid-size SUVs and its flat boot makes it a doddle to load but the optional glass roof eats into rear-seat headroom
Both the Mercedes GLC’s front seats come with electrical adjustment as standard so you’ll have no trouble getting comfortable, even if you’re over six-foot tall. Even entry-level cars get adjustable lumbar support to help prevent backache on long journeys, but you’ll have to pick a Sport model or above if you want heated seats.
There’s absolutely loads of headroom in the front but the optional panoramic glass roof (part of the rather expensive Premium Pack) does eat into the available space slightly. Space in the back is pretty generous, with plenty of room for tall passengers to stretch out without their knees touching the seats in front.
Carrying three abreast isn’t too difficult, either. The footwells are roomy, the centre seat is more cushioned than in an X3 or Q5 and the lump in the floor isn’t particularly intrusive.
The tall rear doors open nice and wide so it’s easy to jump in the back seats and a breeze to fit a bulky child seat. The Isofix anchor points are clearly marked by folding covers so you don’t have to faff around with easy-to-lose removable caps.
The Mercedes GLC’s various cubby holes are huge. You can squeeze a two-litre bottle in all its door bins – yes, even the ones in the back – and the space under the split central armrest is even bigger. The glove box is equally cavernous and is perfect for hiding some bulky valuables such as cameras safely out of sight.
Unfortunately, a one-litre bottle doesn’t quite fit in any of the Mercedes GLC’s cupholders. The two in the front centre console are a little small but at least they’re deep enough to hold a tall coffee cup nice and securely. Those in the folding rear armrest are only really large enough to carry a small drinks can.
A handy touch is the collapsable plastic crate you get with every Mercedes GLC. It’s about the size of a crate of beer, fits beneath the boot floor when folded and helps keep the boot neat and tidy.
Don't think you have to do anything as taxing as adjusting your seat yourself in the GLC – even entry-level cars get electrically adjustable seats as standard
You can fit 550 litres of luggage in the Mercedes GLC’s boot with all five seats in place, which is exactly the same amount of room as in an Audi Q5 and BMW X3 and around 50 litres more than in a Porsche Macan or Volvo XC60 can manage.
There’s enough space for a bulky baby stroller or a set of golf clubs and the boot’s square shape makes it a breeze to pack it full of suitcases or cardboard boxes. There’s barely any load lip to lift heavy items over and plenty of shopping hooks to stop your groceries rolling around.
There’s a generous amount of storage under the lockable boot floor too – so you can hide lots of small valuables away out of sight – and a dedicated slot for storing the load cover.
Folding the rear seats is a breeze – you just push the buttons in the boot and they flip down in a handy three-way (40:20:40) split. This means you can carry two rear passengers and some long luggage in the boot at the same time.
The Mercedes GLC’s boot floor is nearly completely flat with the rear seats folded so it’s easy to slide heavy boxes right up behind the front seats. Its 1,600-litre capacity is the same as the roomy BMW X3 and 50 litres bigger than the Audi Q5 and there’s more than enough room to carry a bike with its wheels attached.