Why won't my car start after replacing throttle body 2006 a6 quattro

Hello, You probably just need to adapt the throttle body, or the battery is not connected properly. Turn the car to ON, press the accelerator to the floor, wait one full minute, let it up, wait a full minute, turn the car to off and remove the key. If you have issues after that, recheck your work, scan for trouble codes, and lets see what it tells you.