Will KALLAX Shelf unit, white, 16 3/8x57 5/8 " fit in an Audi A4 Avant 2022?

The A4 Avant pairs a wide mouth with real height: the opening measures 40⅛″ across and 33½″ tall, so upright boxes pass through without a tilt. The floor gives you 41⅜″ with the rear seats up and 72″ once they fold, a gain of 30¾″, with 39″ between the wheel arches at the tightest point. The lift-over sits at 24¾″ and the floor is only 2″ below it, almost level, so long boxes slide in instead of dropping in. Tall furniture cartons and long flat packs both do well here; extra-wide boxes meet the 39″ pinch first. Slide heavy loads across the sill on a blanket rather than lifting them over.

The KALLAX travels as one long, flat carton: 60¾ inches by 16 inches, just 4¾ inches thick, at 39 lb 11 oz. The length is the whole challenge. A box this long clears very few trunk openings with the rear seats up, so plan on folding them before you leave the driveway. A wagon or mid-size SUV with the bench down takes it flat on the floor; a small hatchback needs it angled between the wheel arches. Particleboard this heavy flexes in a slim sleeve, so carry it on edge with a hand at each end, and rotate it diagonally through door frames instead of pushing it square.