Please can you help

This is my first rrs 2006
I’m used to my Audi a4’s

My car drives when I put my foot down it says special features off, then the lights between us on the middle caseing where the special features are lit up they go off and the car looses all power!!

Can anyone help please?? No engine light on just comes up that then have to switch car off and on again for it to go back to Normal