Will FRIDHULT Sleeper sofa, Knisa light gray fit in a Peugeot 5008 2021?

This trunk lives two lives. With all rows up the 5008 gives you a 13⅜″ shelf, groceries and not much more. Fold the seats and the floor runs 74″ deep, a +60⅝″ swing, behind an opening 44½″ wide × 31½″ tall. The floor stays 45¼″ across at its narrowest, wider than the mouth itself, so any box that clears the opening will sit flat inside. The liftover is 27⅛″ with a ⅜″ drop to the floor, close to flush, so you slide heavy boxes in instead of lowering them. Long flat packs are the easy case; tall cartons still have to duck under that 31½″ opening, so check height first on borderline boxes.

The FRIDHULT sleeper sofa ships as one solid block, 47¾″ long, 28″ deep and 18¼″ tall, and it carries all its weight in that single box at 73 lb 10 oz. Nothing here is long, but it is dense and bulky, so the real trouble is lifting it and finding an opening tall enough to clear 18¼″. A hatchback with the rear seats folded, an estate or an SUV all take it without drama. Treat it as a two-person lift, slide it in flat on its widest face, and keep the fabric off the sill so you do not scuff it.