So I bought a 1999 Audi A6 Quattro (177,562 miles on it). I was told the fuel pump was bad. So I replaced that. The battery was completely frozen so I bought a new battery. I got it started ran all day yesterday with out a problem. Now today it won't even turn over. Any ideas on what it could be? Because I'm not very mechanically inclined I mean I know the basics, but that's about it. Please help

 

I went home on lunch so it sat for 5 hours abd now it cranks, but still won't start... I need help