If you can manage to hail down a minivan or
sedan type taxi you will have a much easier time, as these vehicles are easy to install a car seat in and have much more
room than a smaller,
traditional taxi.
Granted, the 3 Series is a tad smaller
than the Gran Coupe and A5 Sportback, it's a
traditional sedan, and can't offer as much
room on the inside, but it's car you need to consider if you can live with all the above and pay less for a premium vehicle.