I have a 2007 Mercedes Benz ML350 4matic with P3 Package, I just got it CPO, On my steering wheel there is a voice activation botton, and it is not working. I went to the dealer and they told me i don't have voice activation. i just wants to make sure, does the 2007 Mercedes Benz ML350 4matic with P3 Package have voice activation as a standard equipment, thankyou.