Thread: W204 Audio 20 Aux Boost Feature

I have a 2009 c300 with standard Audio 20 headunit. In driving the 2010 model I noticed the standard Audio 20 headunit now have an audio boost feature in the Aux mode. Is it possible to have the firmware/software for my 2009 Audio 20 upgraded to the 2010 Audio 20 so that I may have this boost feature? If yes is there an available upgrade CD so that I can complete it myself or do I need to have the dealer do the upgrade? What is the firmware/software that came with my 2009? What is the firmware/software verison in the 2010 that has the boost feature?