I just purchased the car yesterday it was driving fine for about 4-5 hours straight then I went to start the car and the dashlights went flickering and there was a clicking noise I could hear when I had the door open when I was trying to start the car. The radio also worked. After a couple more tries the dashlights went dead and the radio was off as well so no electrics. I'm not really sure what it is I'm new to the audi game (first car actually ) my friend thinks it may be my starter or battery

 

Sounds like a dead battery, try hooking jumper cables up and see if your lights come on. Leave the cables connect for a couple minutes and rev the engine of the car that has the good battery, then try starting your Audi, Good luck!