so i went to start my car yesterday. hit the unlock button doors unlock. put the key in dash lights up everything working as normal. go to start the car. and all i hear is a clicking noise and the lights dim. doesnt sound like it even wants to crank at all. havent started it for a few days. but the time i drove it, it was running great. but everything else works fine. any ideas of what it could be?

2001.5 audi a4 1.8
thanks!

 

does the dash light still work? try to jump it.

 

its a dead battery genius.