I have the Puma 20 which is of similar dimensions to the Q300 and the main issue is the height of the opening of the tailgate as most car boots are wide enough to accommodate the chair sidewards, unfortunately I have a modified static front footplate which makes it longer than standard and this means I can only use ramps to load/unload my chair but as I now have a Peugeot Rifter LWB it is the simplest of tasks.