We have a two door yaris with a rear facing car seat (maxi cosi pebble) We have an isofox base to make it easier to get the seat in and out. We have a bugaboo buffalo (bigger wheels than chameleon) and these fit in fine
only slight issue is when we go away for weekend, as travel cot and all stuff is a tight fit but not impossible and we don't do it that often. Hope this helps!