We can fit three car seats in DH's Kluger and three in my Yaris (you'd never believe it LOL). In my Yaris I have two Maxi Rider I's (the first version without the arm rests) and a Safe N Sound Unity capsule. In DH's car we have a Maxi Rider II, a Safe N Sound Explorer (it's kind of like a Maxi Rider I) and DD's Unity capsule. When DD grows out of the capsule I will be using a Safe N Sound Compaq Deluxe in my car.

Good luck!