How do u play music from your phone in a 2008 audi a6 4.2?

 

One of the way is to see if there is an AUX input in your car. A 3.5mm headphone jack is often found on the dashboard or center console.
Attach one end of the AUX cable to the headphone jack on your phone and the other end to the AUX input on your automobile.
AUX is the audio source to use in the automobile.