You sound like me
I currently have a 120d that is my pride and joy I love it, so much fun to drive and so nice all round.....however it turns out that it's not a babys car lol the boot isn't big enough and when you put the car seat in the back the passenger in the front needs to pretty much have no legs lol
Disaster!!!!
Now we love the Beemer so much we are keeping it but it will now be hubby's car, and I am changing his car for a 08 rav 4 (it's currently my dads car...we are doing a swap around lol )
Now the rav I can just chuck the pram into and still get other people in the car with the car seat in, and the dog fits too lol so it's definitely a lot better for baby
I don't know how big the a3 is in real life so you may want to go have a look at one
Do you have your pram and car seat yet? It might be a good idea to take them and have a day of car shopping, go look at cars you like the look of and try the pram in the boot and the seat in the back of the car, that way you will know for sure that it all fits
Remember as much as you want something you love you also want to make things as easy for yourself as possible
And when little one is a couple of years old you could get something like a 1series, when they don't need a big pram and can get in the car themselves etc
Just want you to know your not alone in not wanting a 'family' car lol