the arm rest is locked in place, so there you’ll be forcing your wheel against or up over it, potentially damaging/marking it, and you’ll probably need to take the pedals off too, to fit between the seats
Otherwise I can see no reason why your plan wouldn’t work, personally I just take the wheels off and throw mine in the back (sans seats), but then I don’t carry passengers, and will be looking at a transit next time for more space.. also my XL Levo frame reaches from the back door to the seats, without a wheel fitted..
PS. I’d just a get a roof bars and step, to reach it..