M4A

Hi,

I have an Audi A4 2015 2.0 Tdi with automatic transmission. I have noticed that transmission won't engage when car is in slight hill. It can be just couple degrees of incline, I will press the gas pedal and rpm will rise and nothing happens. Only when I rev the engine to like 3000 rpm transmission will engage, tires will spin, I will let go the gas and depending on how steep the hill is the engine will most likely stop. I went to Audi dealership, they checked the transmission, updated the software and said it's fine, they can't find the issue. They said I drive it wrong. By that time I was not sure when it occurs, so they could not replicate it on flat ground. But for real, I believe it could be something to do with that hill rollback protection. Has anyone had similar issue?

Note. This happens driving both ways - when driving up the hill forwards or backwards in reverse. And by hill I mean sometimes an incline that you can barely notice.