2001 Audi A4 Quattro fails to start after I lost oil through dipstick sleeve. I cranks fine. Getting fuel. Plugs good. Doednt seem to be any damage from the loss of oil.

the radio does not generally cause this kinda issue. but a few things you will want to try is check for spark which is the first thing. Next check all the vacuum lines for leaks. There is a vacuum line that is on the drivers side of the car runs along the top side of the head it often breaks because the line is a funny rubber plastic and hates heat. also check your gauges for a key icon when you turn the power on mode. if there is a key in the dash its likely the car may have become unsynced to the car and the immobilzer is causing hte car to not start.