Households with a student musician often reach a point where the instrument has to travel. A cello or a double bass in a soft case is a different load from a bag of groceries. It is tall, it has a fixed shape, and it has to stay upright or lying down without sliding. This guide treats the car as a fit problem and sets out what to measure, what to read, and what to try before a model line is chosen for this purpose.
Measure the case, then the seat
Record the outside length, width, and depth of the case with the endpin fully retracted, then add the depth of the scroll or neck if the case will stand upright. Measure the front passenger seat's fore and aft travel with the seat set where a passenger would sit, and note how far it can move back before the track ends. Measure the footwell depth from the dashboard to the floor. These measurements decide whether the case sits upright, reclines, or has to ride lying down in the rear.
Check the footing and the lean
A case that stands on its endpin needs a floor that will not let it slide. Look at whether the passenger footwell has a flat area behind the seat track, and whether the seat back can be laid flat or folded to give the case a wall. If the case must lean against the seatback, check that the lean angle keeps the neck clear of the headrest and the window.
Read the airbag and belt sections first
Before anything goes into the front passenger seat, read the passenger airbag and seat belt sections of the owner's manual for the model year in question. The manual sets out the rules for objects on the front seat, for any passenger airbag switch, and for how a load should be secured. Do not rely on a verbal description of those rules. Use the manual, and ask the seller to show you the page.
Secure it before the car moves
Route a seat belt around the case where the belt geometry allows, and check that the buckle and anchor point do not let the case shift in a stop. A case that moves in a stop becomes a loose object in the cabin. Test the set-up at parking speed with the belt and case in place, and press on the case from several sides to see how much it gives.
Walk the route in and out
Practise the load with an empty case of the same size, or with a box taped to the same outline. Check the door opening, the sill height, the hinge swing, and whether the case has to be tilted or turned to clear the door frame. A layout that fits on paper can still need a turn that is hard to make in a narrow parking space.
Compare the cabin, not the badge
When comparing model lines for this purpose, list the rear seat fold, the flatness of the load floor, the rear door opening, any seatback pass-through, and the front passenger seat travel. Write each figure beside the matching case measurement. A line that works in a showroom can fail when the case is wet, heavier, or longer than the sample you measured.
Questions to put to the seller
Ask whether the front passenger seat can be moved to its rearmost position with the case in place. Ask whether the car has a passenger airbag switch and where it is controlled. Ask for the owner's manual page on front seat loads. Ask whether the rear seat folds flat and whether a fold-down pass-through exists. Write the answers down with the model year, because the same model name can change its interior from year to year.
The model-year pages linked from this site are a starting point for the year-by-year record of a model line. They do not replace a measurement, so take the case to the car when you can, or confirm the cabin figures in the owner's manual before you decide.