Asking whether a Audi A3 8Y Sportback 35 TDI S line S tronic is a good family car, is not easy to answer from a technical point of view. The range of families requirements is wide, so this representation only considers the common aspects.
The Audi A3 has 5 seats, which is enough for many families, and also brings a decent trunk with 1200 liters of volume, in which there is still room for luggage even with a stroller loaded. Good conditions for a family car. There are no Isofix brackets installed. These could be used to secure child seats easily and safely, if a little more space is needed in the interior, the rear seat can be folded down.