I'm not 100% sure if all 6-disc systems will work with the upgraded sound package or not.....BUT I can offer up advice on a great alternative.....
After two separate times the CD's all jumping off track inside the stock headunit due to a pothole (yes, this happened TWICE to me)....I decided it was time to figure out how to enjoy an upgraded aftermarket headunit while keeping steering wheel controls and the factory subwoofer
^ I wrote this thread ^
What I wrote will apply to ANY aftermarket head unit that Crutchfield.com says will operate in your car.....you can specify on their website that you have the upgraded sound package and steering wheel controls to find a unit that will work.....then shop the model number for the cheapest price using google shopping. I ended up getting mine on Amazon.