Warning lights and car will not stay running

[Rosen]

My 2016 A6 warning lights came on out of nowhere while driving, forcing me to pull over and park. When I parked my car I shut it off and cranked it back up. It started but lights came on and I was not able to shift out of park. Then it started to shut off. I towed it home and did some research. Tested battery and battery is bad. Replaced the battery but still having this issue. I need help

[Magnet]

Welcome to the Audi Owners Club !

Good to have you onboard.

Hello Rose,

Two things to try first. 

Get the alternator output checked once running. 

Has the new battery been coded to the car? 
Kind rearguards,

Gareth.