Horn circuit for Mercedes-Benz S-class W220 facelift (2002-2005)

1 2 2 CAN-B L CAN-B H 10 4 HORN GND 10 9 3 2 CAN H CAN L CAN H CAN L BLK WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FANFARE HORNS FANFARE RELAY FUSE 28 GRN WIRE GRN/WHT WIRE HORN/ AIRBAG CLOCK SPRING CONTACT HOT AT ALL TIMES HOT IN RUN OR START LEFT FANFARE HORN SWITCH LEFT MULTI-FUNCTION STEERING WHEEL PUSHBUTTON GROUP NCA WIRE RED WIRE RIGHT FANFARE HORN SWITCH RIGHT FRONT FUSE, RELAY BOX (RIGHT REAR OF ENGINE COMPT) RIGHT FRONT SAM CONTROL MODULE (IN RIGHT FRONT FUSE/ RELAY BOX) RIGHT MULTI-FUNCTION STEERING WHEEL PUSHBUTTON GROUP STEERING COLUMN MODULE WHT WIRE YEL WIRE