1996 Audi A6 Base 6 Cyl 2.80L
so i am driving down the hwy and i smell a rottn egg smile then my car starts to over heat and then the car shut off and
want start back up and theres no check engine lights on
Sounds like your catalytic converter is bad. If a catalytic converter is bad it can cause a rich fuel mixture that makes the exhaust smell (like a rotten eggs form the hydrogen sulfide).