How do I connect multiple aux devices to a smart car's radio 9?

I currently have a Smart car (451 shape) with the smart radio 9 model installed. I also bought the car with a Parrot CK3000 Evilution hands free phone kit and a Smart Garmin StreetPilot C510 navigation system installed. All works fine except that they have unplugged the glove box's 3,5mm auxiliary jack to connect the Smart Garmin StreetPilot c510. I am rather technical and can do the connecting and everything myself, all I need are instructions on which pins on the Smart Radio 9 to use for what to add in the 3,5mm aux jack in the glove box please bearing in mind that the Parrot CK3000 Evilution and the Smart Garmin StreetPilot c510 needs to mute the radio when operational... Thanks a STACK!!!