V70 D5 or A6 2.5

Hello, I am thinking about whether my next car should be a Volvo V70 D5 Bj 2004 up or an A6 Avant 2.5/1.9 with automatic / multitronic. Audi is of course more dignified by the equipment. However, he has problems with the multitronics. I want to pull my caravan on holiday and make sure that the transmission does not fly around my ears, even after high running performance. Your experiences in this regard would interest me.