Measuring a loading opening
This is a measurement method, not a product specification.
Measure the opening and the path, not the vehicle’s name. A class of car, a cargo volume and a pair of “boot width” figures do not identify the pinch points.
Record the clear width and clear height of each opening the box has to pass: doorway, hatch, or rear door. Measure the smallest clear span, including weather seals and hinges that intrude. Then measure the usable interior length, width and height along the path you would actually slide the box, not the maximum dimension hidden beside a wheel arch.
Match those readings to the carton you have, with its axes named. Do not reorder the carton sides by size and then assume the longest side is allowed to lie flat. Packaging arrows and the manufacturer’s handling note decide the permitted orientations. If you do not know which way is permitted, you do not yet have a loading answer.
This site does not publish a vehicle-fit verdict. The useful record is the opening you measured, the carton you identified, and the orientations you are allowed to try. A later loading check, if one is added, has to be able to say that the information is insufficient or that one straight orientation is ruled out. It must not turn a simplified miss into “impossible in every orientation.”
Photograph the tape against the opening if someone else will load the set. Include the unit in the note.