My dads Audi A6 Quatro 2005 model was working fine yesterday morning but in the afternoon all dash lights was down car does not even wanna start all thats working is the radio and thats it .I replaced the battery for a new one and still nothing what can it be .

my dad is returning from germany on friday i told him about it and now im trying to sort it out what can it be pls someone help .

Thank u