Will KARMSUND Floor mirror, black, 15 3/4x65 3/4 " 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.

One long, thin box: the KARMSUND mirror ships as a single package at 65″ × 16¼″ × 1¼″ and 21 lb. The weight is nothing; the shape is the whole job. A 65″ carton with glass inside cannot bend around a seat gap or ride upright, it wants one flat, straight run, and few cars offer that with the rear seats up. Fold the seats in a wagon, hatchback or SUV and the length usually clears. Feed a top corner through the opening first, lay the box flat on a blanket with the glass side up, and stack nothing on top. The corners are the weak point, so pad both ends before it leaves the store.