I have an audi 2.0 tdi ( 2005) , the car just lost power while driving and now wont start , could it be the computer box ? or something else ?
I would check battery first. If that is o.k. then have a look at what the alternator is putting out. The battery really needs to be load tested for a proper check. If it's more than a few years old that's all about they last. Start with the easy stuff first and if it's more involved then get the obd scanned. Good Luck!