I have a 2009 s60 2.5T, base model, with the base speaker/radio configuration. I'm pretty sure my car can play CDs with mp3 files on them, as that is standard on Volvos. However, when I tried playing a CD, it just gave me an error message. The CD was fine; I checked it on my computer and my home theater system. Why won't it work? Is mp3 decoding not standard on a 2009 volvo?