Will MULIG Drying rack, indoor/outdoor, white fit in an Alfa Romeo 159 2010?

The 159 gives you plenty of height at the opening and less width than you would like. The mouth measures 36⅝″ wide by 50¾″ tall, so tall boxes go in easily, and the floor matches it at 36⅝″ across its narrowest point. Length runs 40⅛″ with the seats up and 69⅝″ folded, a gain of 29½″. Wide, rigid cartons are the ones that fight you here. The sill is 30⅜″ off the ground with a 9⅞″ drop to the floor, so lift over the lip and lower, rather than sliding.

The MULIG drying rack ships as one flat box, 47¼″ × 22½″ × 3″, and at 9 lb 9 oz you can carry it under one arm. This is about as easy as IKEA transport gets: a single package, barely any weight, just a wide flat rectangle. Almost any car takes it, back seat included, and most trunks swallow it without folding anything. The one dimension to respect is the 22½″ width, which meets a narrow opening at an angle rather than head on. Slide it in like a tray, corner first, and keep the box flat so the cardboard does not crease across the rails.