Towing vehicle with automatic transmission

We bought our first Wowa this year because we were on the road with a camper a few years ago and we feel very good about it. Our towing vehicle is a Hyundai Sonata with 131 Ps and automatic transmission. Does anyone have experience with an automatic transmission? Should you have the gears selected or switched yourself with Tiptronic? The Wowa has an zGG of 1100Kg . Thanks now for the answers.