rear seat headphone controls will not work on 2008 Volvo XC90

the controllers on the post that lets rear seat passagers change stations or control the cd will not work

1 answer
You'll need to have a Volvo repair shop look at this, assuming you have all the setting adjusted correctly. I would double check with the owners manual just to be sure, here is one online for free: http://repairpal.com/automobile-owners-manuals-online