I have a 2006 SLK R171 with Audio 20 installed, I am trying to install a Parrot CK3100 with Parrot steering wheel controller. Can someone tell me where to connect Mute connection and where do I pick up the Canbus High & Low. The Parrot manual says pin 9 & 11 are the correct pins from the back of the Audio 20 but the Parrot website says pins 1 & 2 in the Fakra connector.