I have a 2000 C280 Sport Special Edition with a cellular phone (StarTac ST7760) built into the audio system. This phone, according to my service manager, has special software (don't know if the s/w is in the phone or the audio system) that only permits use of the ST7760 with the audio. I have a company phone (StarTac ST7800W) and don't need the MB-furnished phone and would like to use the company phone with the audio. (Going through my company to exchange phones, etc, etc. would require more time and patience than I have.) Does anyone know if, or how, my current company phone could be adapted tp the MB audio system?