Well only a couple months till first kid and decided my 6 series coupe needs to go for something abit more practical.....can't Imagen you can even get a baby seat in back of a F13?!
I bought my F12 shortly before my first was born. The first size car seat (0-18 months) fits in fine and I'm sure the next one up will as well. Buggy would probably be tight in the boot due to the opening but I'm sure I'd get it in if I needed.