My wife has a 56cm road bike with the seat fairly high. We can't get it in the 3 trunk unless she lowers the seat (no quick release) AND removes the front wheel. That's already more than she wants to do, plus she has a bad back so trying to lift and slide it in without damaging anything seems too much for her.
She takes her bike with her a lot, so she drives the X. (She says her S was easier, just because the load floor is a little lower).
If you want to stick with the 3 and also don't want to disassemble the bike, a hitch solution should work fine. (We had one on our first S).