My wife and I are expecting twins later this year (at which point our first child will be 2 years and 3 months old) and is currently using a harness back supported booster seat. I am currently looking for a car that has 5 seats as I would rather avoid purchasing a 7-seater.
My options are BMW 5 Series Estate, E class Estate, BMW X5 or a Mercedes ML (all 13 or 14 plates). Anyone know which of these cars will be best to support our family and whether we can or cannot (space-wise) use two ISO-fixes for the twins with any of these cars and then an infant seat or adult in the middle rear seat?