Mercedes-Benz SLK-class AMG R172 (2011-2016) volume control Wiring diagram

"BACK", VOICE ACCEPT/TERMINATE ANT ANT SAT AUDIO/COMAND DISPLAY BACKWARD BUTTON BLK WIRE BLK/WHT WIRE BLU WIRE BLUETOOTH MODULE (EARLY PRODUCTION) BRN WIRE BRN/RED WIRE BUTTON BUTTONS +, - FOR SETTING CAN A H CAN A L CAN B H CAN B L CAN E H CAN E L CELLULAR TELEPHONE SYSTEM ANTENNA AMPLIFIER/ COMPENSATOR CLOCK COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM CONTROL SYSTEM DATA 0+ DATA 1 (+) DATA 2 (+) DIGITAL AUDIO BROADCASTING CONTROL UNIT FANFARE HORNS, AIRBAG CLOCK SPRING CONTACT FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE FUSE 11 FUSE 13 FUSE 16 FUSE 26 FUSE 81 FUSE 84 GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LATE PRODUCTION LEFT DOOR SPEAKER LEFT DOOR TWEETER LEFT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP LEFT REAR SPEAKER MOBILE PHONE CONTACT PLATE MOST DATA BUS CIRCUIT MOST IN MOST IN MOST MOST OUT MUTE BUTTON NCA WIRE OFF BUTTON ORG/ WIRE ORG/BLK WIRE PHONE CALL PNK WIRE PNK/BLK WIRE RADIO REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/VIO WIRE RED/YEL WIRE RIGHT DOOR SPEAKER RIGHT DOOR TWEETER RIGHT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP RIGHT REAR SPEAKER SATELLITE DIGITAL AUDIO RADIO (SDAR) CONTROL UNIT SCROLL FORWARD/ SELECTION SHIELD SPECIFIC FUNCTION, STEERING COLUMN MODULE CONTROL UNIT SYSTEM SYSTEM ON VIO WIRE VOICE CONTROL VOLUME CONTROL W/ COMAND W/O COMAND W/O SOUND SYSTEM WAKE-UP YEL WIRE YEL/BLK WIRE