Hello,we own a BMW 320(4 door) and we are just wondering if anybody knows we are allowed or rather is it legal to sit 2 adults plus a baby car seat at the back at all(probably going to be abit cosy)?sorry I am a first time mummy and my baby is due early dec and my parents are visiting in Jan and I would imagine we might have a couple of family meals out which would require us to use the car!i tried to look for information about this but I can't seem to find any!if any body could shed some light that will be very much appreciated!thank you very much in advance 