If your wheelchair folds, it likely will not have width problems ... the reason I wnet to a coupe instead of a cabriolet is because you use some use of the vertical space due to the "accordian" type folding of the cabriolet hatch. I carry a massage chair or a massage table. I can pack one or the other, and I put the front passenger seat in the folded flat position. You could probably do that and get your chair in at a diagonal, despite the cabriolet fold...but, a bettr choice might be to buy the bike rack that attaches to the tow hitch. Anyway, just my own experience and observations to share. Good luck!