iOS6 wifi problem with 4S

When I updated my 4S to iOS6, my phone stopped playing music through my VW's radio. I can still talk on the phone through radio, but I can't play music through auxiliary because the iphone doesn't show up as an option which means radio doesn't recognize the iphone as a wifi possibility. I was hoping for an software update but 6.0.2 is only for iPhone5. Any chance they will widen the update.