Wiring schedule for 2002 new beetle volkswagen radio

hi, I have a DEH 1500 UB, while driving when I get phone I need to make the radio to mute, however , there is no mute button, how can we do it hi, I have a DEH 1500 UB, while driving when I get phone I need to make the radio to mute, however , there is no mute button, how can we do it

Someone installed the radio and removed the factory radio and they must not have a wire hooked up or misfired. I need to know which wire would hook to the factory wiring to make it work. They used one pigtail to plug into the factory plug but there is still another factory plug that's not hooked up at all. I have a 2004 Chevy trailblazer with rear radio controls and rear ac controls Someone installed the radio and removed the factory radio and they must not have a wire hooked up or misfired. I need to know which wire would hook to the factory wiring to make it work. They used one pigtail to plug into the factory plug but there is still another factory plug that's not hooked up at all. I have a 2004 Chevy trailblazer with rear radio controls and rear ac controls