My Discovery 3 could not start after stopping at a grocery shop. Hazard lights went on as if I was stealing the car. I have no idea what happened. It has never started again ever since for the last 3 months. What could be the problem.

 

A million different things have you checked the codes, battery voltage etc...

Is it turning over? What motor?

 

...and it's just been SITTING for 3 months!?!?!?