Thanks, I replaced the door opening mechanism with something else, like the one on the bus.
And there is some space in the sleeping compartment. I would use the piece that was in official camper, but it isn't in LDD.
Here are some cars that I made. They are 5 wide.
Inspired by those from Ralph_S.
First is a regular blue car:
Next a police car in two versions:
A car inspired by Toyota Corolla Verso:
And a red car:
This car is a new, improved version of my old black car. It is 6 studs wide, can sit 2 minifigs and has opening doors and trunk. It can also have roof, but I don't have a black 4x6 hood/curved plate.
More photos on Flickr