If there are any of you reading this, im after imfo on the child car seats/restraints used over in Oz please. Do the cars tend to have the same Iso Fix points as cars over here and what additional fixing points are there?? Ive read about a Top Teather/Strap that is additionally used! Is this something on the restraints or fitted to the car. Also do the car seats use Iso Fix?? If a top teather is needed how is it fitted? Welded to the seat back etc This is for children aged 4+ forward facing in both an A3 and an A6 Avant. Any help/Advice is really appreciated. Also what are the Aussie Tyres?? Apparently they are more heat proof? Is this right? And if so how much do they differ from UK tyres? thanks for any help!