3 Carseats in BMW Station Wagon

If your oldest is going to be over 3 years old when the baby comes, you can get a vest-style seatbelt (called "Saferider"). We use it in cabs in NYC, and it legally replaces a carseat if your child meet the weight/height requirements. Then you will certainly be able to fit 2 other carseats in the rear. We only use it infrequently, though, and my daughter doesn't legally NEED a seatbelt in taxi cabs, but I thought I would pass along the idea.

Hi A.! We have a Sunshine Kids Radian carseat. It is very narrow and supposedly you can fit 3 across in a seat. I know we could in our CRV. You could check it out. I also like it because it folds up for travelling. Just note that it is a heavy seat (20 pounds), but I don't mind that.

It depends on your car seats. Some are made with a slimmer profile in mind. Measure what you've got and what you are thinking to buy.

I second the sunshine kids radian. They boast about how you can fit 3 carseats across in an average car. We have just one so far, but it is very slim and fits well in one seat.

Sunshine radian 80-the best!
Check it out at www.happyhealthymom.com

gosh, I have a 3series wagon and could possibly squeeze a rear facer in the middle with the two convertables on the side. I would assume a 5 series is a little larger. Regardless, you will need slimer brands of convertables/front facers (read - not Britax - they are monsters - LOL!)
I don't know how things work in switzerland, but at babies r us in US you can typically sweet talk the sales folks to take the car seat out to your car and estimate the fit.
Not sure if any of that helped, but I am sure you could make it work if you needed:)

I have 535 xi which is a pretty decent size sedan but unfortunately, the last infant car seat won't fit! With three kids, your best choice is to get a minivan and be comfortable!!!! Sorry! I never saw myself in a mini van but it's a best thing ever. Good luck and congrats!