Mercedes-Benz C-class W203/S203/CL203 (2000-2004) (left side of trunk) Wiring diagrams

1 2 3 31 30 WAKE 1 2 AMFM CLEAR CLEAR AM/FM AM/FM 1 2 CAN B L CAN B H 1 2 CLEAR CLEAR AM/FM AM/FM 1 2 CLEAR CLEAR ZF ZF 1 2 GPS CLEAR GPS GPS 1 2 ZF CLEAR CLEAR ZF ZF 1 4 2 A-ST FZU 30 2 1 30 DIAG 4 3 2 30 FZU A-ST 4 5 CAN L CAN H 6 29 23 DIAG WAKE MUTE AMPLIFIER MODULE (SCREEN ANTENNA) ANT BLK WIRE BLU/BLK WIRE BRN WIRE BRN/RED WIRE CD PLAYER COMAND OPERATING, DISPLAY, CONTROL MODULE COMPUTER DATA LINES SYSTEM CTEL INTERFACE (IF EQUIPPED) DIAG MUTE 30 ANT FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GPS ANTENNA (IF EQUIPPED) GRN WIRE GRN/BLK WIRE HOT AT ALL TIMES NCA WIRE OPTIC CABLE CONNECTOR ORG/ WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE TELE AID TRANSMITTER/ RECEIVER (FRONT OF SPARE TIRE WELL) VOICE CONTROL MODULE (IF EQUIPPED) WAKE WAKE UP SIGNAL CONNECTOR YEL/BLK WIRE

1 2 CAN B L CAN B H 1 6 DIM DIM 6 7 CA CAN-C L CAN-C H 6 7 CAN-B H CAN-B L 9 10 2 1 CAN-B L CAN-B H 30 31 AIS 31 AIS AUTO DIM BLU/GRY WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC SELECTOR LEVER CONTROL MODULE (AT BASE OF SELECTOR LEVER) FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 21 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) INTERIOR REARVIEW MIRROR UNIT LEFT EXTERIOR MIRROR LEFT FRONT DOOR CONTROL MODULE MIRROR SENSOR (BACK) MIRROR SENSOR (FRONT) AUTO DIM NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK/BLK WIRE PNK/RED WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/WHT WIRE

1 2 CAN B L CAN B H 3 4 PNK COMFORT COMFORT WIRE BRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 GRN WIRE HOT AT ALL TIMES LEFT FRONT SEAT BELT COMFORT SOLENOID PNK WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RIGHT FRONT SEAT BELT COMFORT SOLENOID

1 2 9 10 31 30 CAN L CAN H 17 18 12 13 CAN-B L CAN-B H CAN-B L CAN-B H 2 3 FUEL CAP FUEL CAP 3 4 CAN-B L CAN-B H 4 5 CAN L CAN H BLU/GRN WIRE BLU/RED WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COUPE, SEDAN DISPLAY FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUEL FILLER CAP CENTRAL LOCKING MOTOR FUSE 2 FUSE 4 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INTERIOR CENTRAL LOCKING SWITCH LEFT FRONT DOOR CONTACT SWITCH LEFT REAR DOOR CONTACT SWITCH (SEDAN, WAGON) LOCK PAWL ROTARY TUMBLER SWITCH (COUPE, SEDAN) MOTOR W/ POSITION, OBSTRUCTION SENSORS NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RIGHT FRONT DOOR CONTACT SWITCH RIGHT REAR DOOR CONTACT SWITCH (SEDAN, WAGON) ROOF DRIVE SYSTEM SEDAN WAGON SEDAN, COUPE TRUNK LID CENTRAL LOCKING MOTOR TRUNK LID CONTACT SWITCH TRUNK LID EMERGENCY RELEASE SWITCH TRUNK LID EXTERNAL OPERATION SWITCH UPPER CONTROL PANEL CONTROL MODULE VIO/BLU WIRE WHT WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE

1 2 3 4 5 6 9 10 11 SHD (+) SHD (-) 1 2 CAN B L CAN B H 31 UKB UKB UKB 9 10 CAN-B L CAN-B H BRN WIRE BRN/GRY WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 HALL SENSOR 1 HALL SENSOR 2 OBSTRUCTION SENSOR HOT AT ALL TIMES NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE POWER ROOF SWITCH REAR ROLLER BLIND (IF EQUIPPED) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE ROOF DRIVE SYSTEM ROOF MOTOR

1 2 3 4 5 6 7 8 9 10 CAN-B H CAN-B L 1 2 AMFM CLEAR CLEAR AM/FM AM/FM 1 2 CAN B L CAN B H 1 2 CLEAR CLEAR AM/FM AM/FM 1 2 CLEAR CLEAR ZF ZF 1 2 GPS CLEAR GPS GPS 1 2 ZF CLEAR CLEAR ZF ZF 1 4 2 A-ST FZU 30 2 1 30 DIAG 3 2 1 WAKE 30 31 4 3 2 30 FZU A-ST 4 5 CAN L CAN H 6 29 23 DIAG WAKE MUTE AMPLIFIER MODULE (SCREEN ANTENNA) ANT BLK WIRE BLU/BLK WIRE BRN WIRE BRN/RED WIRE CD PLAYER COMPUTER DATA LINES SYSTEM CTEL INTERFACE (IF EQUIPPED) DIAG MUTE 30 ANT FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GPS ANTENNA (IF EQUIPPED) GRN WIRE GRN/BLK WIRE HOT AT ALL TIMES NCA WIRE OPTIC CABLE CONNECTOR ORG/ WIRE RADIO REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE TELE AID TRANSMITTER/ RECEIVER (FRONT OF SPARE TIRE WELL) VOICE CONTROL MODULE (IF EQUIPPED) WAKE WAKE UP 30 31 WAKE UP SIGNAL CONNECTOR YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 CAN-B H CAN-B L 1 2 AMFM CLEAR CLEAR AM/FM AM/FM 1 2 CAN B L CAN B H 1 2 CLEAR CLEAR AM/FM AM/FM 1 2 CLEAR CLEAR ZF ZF 1 2 GPS CLEAR GPS GPS 1 2 ZF CLEAR CLEAR ZF ZF 1 4 2 A-ST FZU 30 1-2, 3-4, 5-6, 7-8) 2 1 30 DIAG 3 2 1 WAKE 30 31 4 3 2 30 FZU A-ST 4 5 CAN L CAN H 6 29 23 DIAG WAKE MUTE AMPLIFIER MODULE (SCREEN ANTENNA) ANT BASS MODULE LOUDSPEAKER (2.6L, 3.2L) BLK WIRE BLU/BLK WIRE BRN WIRE BRN/ PNK WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE CD PLAYER COMPUTER DATA LINES SYSTEM CTEL INTERFACE (IF EQUIPPED) DIAG MUTE 30 ANT FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GPS ANTENNA (IF EQUIPPED) GRN WIRE GRN/BLK WIRE HOT AT ALL TIMES LEFT FRONT DOOR MIRROR SPEAKER LEFT FRONT DOOR SPEAKER LEFT REAR DOOR SPEAKER NCA WIRE OPTIC CABLE CONNECTOR ORG/ WIRE PNK WIRE RADIO REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT FRONT DOOR MIRROR SPEAKER RIGHT FRONT DOOR SPEAKER RIGHT REAR DOOR SPEAKER TELE AID TRANSMITTER/ RECEIVER (FRONT OF SPARE TIRE WELL) VOICE CONTROL MODULE (IF EQUIPPED) WAKE WAKE UP 30 31 WAKE UP SIGNAL CONNECTOR WHT WIRE YEL/BLK WIRE

1 2 3 6 7 8 ESA SW ESA SW ESA SW ESA SW ESA SW ESA SW 13 12 10 11 CAN-B H CAN-B L CAN-C H CAN-C L 30 31 2 1 CAN-B H CAN-B L 2 MEMORY LOCATION 4 5 CAN-B L CAN-B H 5 6 7 30 CAN-B H CAN-B L BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CL MODELS COMPUTER DATA LINES SYSTEM DRIVER FRONT SEAT ADJUSTMENT CONTROL MODULE (UNDER SEAT) EXCEPT CL MODELS FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 6 FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 21 FUSE 27 FUSE 29 FUSE 31 FUSE 4 GRN WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) LEFT FRONT DOOR CONTROL MODULE LEFT FRONT DOOR ESA SWITCH GROUP MEMORY STORE NCA WIRE PNK/RED WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SCL STEERING COLUMN ADJUSTMENT LOCK INDICATOR SWITCH STEERING COLUMN ADJUSTMENT SWITCH STEERING COLUMN HEIGHT ADJUSTMENT MOTOR (UP/DOWN) STEERING COLUMN LOCATION (RAISE/LOWER) (FORWARD/BACK) STEERING COLUMN LONGITUDINAL ADJUSTMENT MOTOR (FWD/BACK) STEERING COLUMN MODULE VIO WIRE WHT WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 CAN B L CAN B H 2 19 15 22 18 TRUNK EMERG TRUNK EMERG TRUNK EXT TRUNK MOTOR TRUNK AJAR 4 5 CAN L CAN H BLU/GRN WIRE BLU/RED WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GRN WIRE GRN/YEL WIRE HOT AT ALL TIMES NCA WIRE PNK/RED WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE TRUNK LID CENTRAL LOCKING MOTOR TRUNK LID CONTACT SWITCH TRUNK LID EMERGENCY RELEASE SWITCH TRUNK LID EXTERNAL SWITCH VIO/BLU WIRE YEL WIRE

1 2 CAN B L CAN B H 11 15 COMPUTER DATA LINES SYSTEM CAN-C H CAN-C L 13 12 10 11 CAN-B H CAN-B L CAN-C H CAN-C L 30 31 2 9 10 30 CAN-B L CAN-B H 2001, 2002 EARLY PRODUCTION 3 6 5 8 7 30 CAN-C H CAN-C L CAN-B H CAN-B L 33 34 36 37 42 43 45 46 SS RF SS RF SS LR SS LR SS RR SS RR SS LF SS LF 6 5 WIPE WASH 9 8 CA BLK/BLU WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE CAN B L CAN B H COMBINATION SWITCH COMPUTER DATA LINES SYSTEM COOLANT FLUID LEVEL SWITCH (IN RESERVOIR) DI CONTROL MODULE (2001, 2002 EARLY PRODUCTION) ESP, BAS CONTROL MODULE FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 6 FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 31 FUSE 4 GRN WIRE GRN/WHT WIRE HI LO HI LO WIPER SWITCH HOT AT ALL TIMES INT OFF INT OFF WIPER SWITCH INTERIOR FUSE BOX (UNDER LEFT END OF DASH) MOTOR+ MOTOR- NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE PNK/YEL WIRE RAIN SENSOR (FRONT OF HEADLINER) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RELAY RS 31 STEERING COLUMN MODULE (2002 LATE PRODUCTION) TO WHEEL SPEED SENSORS VIO WIRE VIO/YEL WIRE WASHER FLUID LEVEL SWITCH (IN RESERVOIR) WASHER NOZZLE HEATERS WASHER NOZZLE HOSE HEATER WASHER SWITCH WINDSHIELD WASHER FLUID PUMP (ON FLUID RESERVOIR) WIPER MOTOR (LEFT REAR OF ENGINE COMPT) WIPER ON/OFF RELAY YEL/BLU WIRE