Mercedes·C300·2012 Mercedes C300·Wiring
Wiring diagram

2012 Mercedes C300 — power distribution

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Power distribution

2 1 2 1 1 2 1 2 1 2 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 1 1 2 1 1 2 1 2 1 2 1 2 2 1 7.5A 10A W W A A 50A 60A 50A 100A 100A 150A 80A D B RES 40A 25A T 7.5A 100A C 100A 200A 60A 150A 100A F 50A 100A 150A 150A 100A E 400A 200A FRONT ELECTRICAL PREFUSE BOX REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE CIRCUIT 30 FUSE ON-BOARD ELECTRICAL SYSTEM BATTERY FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE INTERIOR FUSE BOX ALTERNATOR STARTER TERMINAL BLOCK (CIRCUIT 30) FRONT ELECTRICAL PREFUSE BOX C19I 11 A E 2 1 2 1 10 5 A E 14 C18M A B 2 1 2 1 1 3 I3 2 MG1 MG2 B1 4 3 2 5 IG1 1 4 2 3 I4 I1 C9I 30G 49 35 47 50 C30 A 9 5 C12I C8D 2 12 C3I 4 3 C8D 10 C7I 2 E IM1 MR7 MR4 MR3 MR4 MR3 MR5 MR9 MR2 MR1 MR6 1 2 I2 MR8 RED RED RED GRY/YEL RED/BLU BRN RED RED RED RED/BLU RED RED RED BRN GRY/YEL RED/ORG RED RED BLU/WHT RED/GRN BLU/WHT BRN BLK BLK BLK WHT/GRN VIO/BLU RED RED BLK BLK RED RED RED RED RED RED RED RED/YEL RED/BLK RED/YEL BLK BRN RED BLK RED RED BLK BRN/GRN RED/BLU RED/GRY BRN/BLU RED (OR RED/WHT) RED RED RED VIO/BLU WHT/GRN RED BLK QUIESCENT CURRENT CUTOUT RELAY PYROFUSE FUSE 163 158 FUSE 160 162 FUSE 159 161 FUSE 158 160 FUSE 162 FUSE 161 156 FUSE 164 FUSE FUSE 47 FUSE 64 FUSE 46 FUSE 61 FUSE 40 RES ADDITIONAL BATTERY RELAY CIRCUIT 30 ADDITIONAL FUSE ADDITIONAL BATTERY RELAY FUSE 123 FUSE FUSE 156 FUSE 151 FUSE 154 153 FUSE 154 FUSE 155 FUSE 157 FUSE 159 FUSE 153 FUSE 152 FUSE 150 (RIGHT REAR OF ENGINE COMPT) (RIGHT REAR OF ENGINE COMPT) (RIGHT SIDE OF ENGINE COMPT) (LEFT SIDE OF TRUNK/CARGO AREA) (RIGHT SIDE OF CARGO AREA/ TRUNK) (LEFT REAR OF ENGINE COMPT) (BEHIND LEFT END OF DASH) (C-CLASS: RIGHT SIDE OF TRUNK) (RIGHT SIDE OF CARGO AREA/TRUNK) (RIGHT REAR OF ENGINE COMPT) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (W/ AUTOMATIC TAILGATE) (IF EQUIPPED) (W/ START STOP FUNCTION) W/O ECO START/ STOP FUNCTION W/ ECO START/ STOP FUNCTION (C CLASS) (W/ START/ STOP FUNCTION) (GLK CLASS) (C-CLASS) (NOT USED) (NOT USED) (NOT USED) (GLK-CLASS) (C-CLASS) W16/4 W7 ADDITIONAL BATTERY W7/6 W7 W7/1 TO FUSE 150 (DIAGRAM 1 OF 5) SUPPLEMENTAL RESTRAINTS SYSTEM CONTROL UNIT SPECIAL- PURPOSE VEHICLE MULTIFUNTION CONTROL UNIT A/C HOUSING TO INTERIOR FUSE BOX (DIAGRAM 1 OF 5) TO FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE (DIAGRAM 4 OF 5) TO CIRCUIT 15 RELAY (DIAGRAM 2 OF 5) TO FUSE 89 (DIAGRAM 2 OF 5) BATTERY SENSOR INTERIOR PROTECTION & TOW AWAY PROTECTION CONTROL UNIT REAR WINDOW ANTENNA FM ANTENNA AMPLIFIER, FM, AM & CL (ZV) ANTENNA AMPLIFIER TAILGATE CONTROL UNIT TO DC/AC CONVERTER CONTROL UNIT (DIAGRAM 3 OF 5) FROM FRONT ELECTRICAL PREFUSE BOX (DIAGRAM 1 OF 5) STEERING COLUMN MODULE CONTROL UNIT FROM FUSE 158 (DIAGRAM 1 OF 5) ELECTRO HYDRAULIC POWER STEERING COMBUSTION ENGINE & AIR CONDITIONING W/ INTEGRATED CONTROL FAN MOTOR TO FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE (DIAGRAM 4 OF 5) TO FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE (DIAGRAM 5 OF 5) PTC HEATER BOOSTER SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT ELECTRONIC POWER STEERING CONTROL MODULE
15A RES G 30A 30A 15A 20A 20A B H S 15A 5A G C 7.5A 7.5A 7.5A 5A 15A 20A (OR 25A) 20A 7.5A (OR 5A) 7.5A L REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE TAILGATE WINDSHIELD WIPER RELAY SEAT ADJUSTMENT RELAY REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE FUEL PUMP RELAY X1 X1 6 4 C3I 10 8 1 C13A 2 1 5 7 C12I 4 6 C11T 7 3 6 5 C3I C15H C89 9 C3I 13 3 2 3 2 3 1 2 3 1 1 1 RED/YEL RED/WHT RED/GRY BLK/RED RED/GRN BLK/WHT RED/BLU RED/GRN RED/VIO RED/BLK RED/BLU BLK/YEL YEL PNK/ RED/BLK RED/VIO RED/BLU RED/GRN PNK/ PNK/ YEL YEL YEL PNK/ BLU YEL GRY/ BLU PNK/ GRY/ RED/GRN BRN NCA RED GRY NCA BRN BRN BRN BRN BRN NCA NCA FUSE 38 CIRCUIT 15 RELAY FUSE 39 FUSE 41 FUSE 53 FUSE 48 RES FUSE 55 FUSE 58 FUSE 57 FUSE 59 FUSE 54 CIRCUIT 15R RELAY 1 FUSE 84 FUSE 87 FUSE 86 FUSE 89 FUSE 43 FUSE 42 FUSE 37 FUSE 83 FUSE 71 FRONT CIGARETTE LIGHTER W/ ASHTRAY ILLUMINATION FRONT VEHICLE INTERIOR POWER OUTLET VEHICLE INTERIOR POWER OUTLET (LEFT SIDE OF TRUNK/CARGO AREA) (LEFT SIDE OF TRUNK/CARGO AREA) (UNDER RIGHT FRONT SEAT) (NOT USED) (NOT USED) (W/ TRAILER HITCH) (IF EQUIPPED), (W/ BLIND SPOT ASSIST SYSTEM) W/O SMOKER PACKAGE W/ SMOKER PACKAGE (W/ COMFORT AUTOMATIC AIR CONDITIONING) (IF EQUIPPED) (IF EQUIPPED) (W/ TRAILER HITCH) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (W/ SMOKER PACKAGE) (W/O SMOKER PACKAGE) (W/ REAR SOCKET) W19 TO FUSE 42 (DIAGRAM 2 OF 5) FROM FUSE 61 (DIAGRAM 1 OF 5) LEFT REAR DOOR CONTROL UNIT RIGHT FRONT DOOR CONTROL UNIT TRAILER RECOGNITION CONTROL UNIT PARKING SYSTEM CONTROL UNIT LEFT FRONT BUMPER DISTRONIC SENSOR, RIGHT FRONT BUMPER DISTRONIC SENSOR, LEFT REAR BUMPER RADAR SENSOR, RIGHT REAR BUMPER RADAR SENSOR, LEFT REAR & RIGHT REAR BUMPER INTELLIGENT RADAR SENSOR FROM FUSE 41 (DIAGRAM 2 0F 5) FROM FUSE 46 (DIAGRAM 1 0F 5) TO FUSE 85 (DIAGRAM 3 0F 5) TO FUSE 74 (DIAGRAM 3 0F 5) FUEL PUMP CONTROL UNIT REAR BLOWER MOTOR DRIVER SEAT NECK-PRO HEAD RESTRAINT SOLENOID & FRONT PASSENGER SEAT NECK-PRO HEAD RESTRAINT SOLENOID EMERGENCY CALL SYSTEM CONTROL UNIT TRAILER RECOGNITION CONTROL UNIT DVD PLAYER LEFT REAR DISPLAY & RIGHT REAR DISPLAY EMERGENCY CALL SYSTEM CONTROL UNIT INTERIOR LIGHTS SYSTEM SDAR CONTROL UNIT/ HIGH DEFINITION TUNER DIGITAL AUDIO BROADCASTING CONTROL UNIT FROM FUSE 76 (DIAGRAM 3 0F 5)
1 2 1 2 J R 30A 15A 15A L 50A 50A 20A 30A 40A 7.5A 5A 7.5A (OR 7.5A) 7.5A 5A 5A 15A H S T 30G 115V AC1 31 INVERTER 115V AC2 J R 30A 15A 7.5A 20A 5A REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE HEATED REAR WINDOW RELAY 7 1 C15H 2 C66 C15H C14I 3 6 C13A 4 1 2 1 3 3 6 C11R C2G 2 1 1 C90 C14I 2 C88 C12I 3 7 6 4 5 1 2 C11T 1 5 1 2 4 2 3 5 5 6 6 7 3 7 4 8 8 1 4 1 C11R 2 C15H 7 3 4 RED/BLU RED/GRN RED/GRN RED/GRN PNK/GRN RED/BLU PNK/GRN BRN PNK/GRN PNK/GRN PNK ORG/BLU ORG/BLK RED/WHT RED/VIO RED/GRN RED/ORG RED RED/WHT PNK/BLK RED/BRN RED/GRN PNK/BLU RED/BLK ORG/BLU PNK BRN ORG/BLK RED/GRN (OR RED/ORG) RED/YEL RED/GRN RED/GRN RED/GRN CIRCUIT 15R RELAY 2 FUSE 67 FUSE 52 RES FUSE 81 FUSE 77 FUSE 82 FUSE 79 RES FUSE 85 FUSE 74 FUSE 80 FUSE 78 FUSE 68 RES FUSE 66 RES FUSE 76 FUSE 72 LOAD COMPARTMENT SOCKET SOCKET MICRO- SWITCH 115V SOCKET DC/AC CONVERTER CONTROL UNIT FUSE 49 FUSE 90 RES FUSE 50 FUSE 51 FUSE 91 RES FUSE 75 FUSE 65 FUSE 92 RES FUSE 73 FUSE 63 FUSE 88 RES FUSE 62 FUSE 69 FUSE 70 (LEFT SIDE OF TRUNK/CARGO AREA) (GLK-CLASS: LEFT REAR CARGO PANEL) (RIGHT SIDE OF CARGO AREA/TRUNK) (GLK-CLASS: RIGHT SIDE OF CARGO AREA) (LEFT SIDE OF TRUNK/CARGO AREA) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (W/ AUXILIARY JACK) (IF EQUIPPED) (GLK-CLASS) (W/ MOBILE PHONE PREINSTALLATION W/ UNIVERSAL INTERFACE & W/ STATIONARY HEATER) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) GLK-CLASS EARLY PRODUCTION (GLK-CLASS) (C-CLASS) C-CLASS & GLK-CLASS LATE PRODUCTION (NOT USED) (NOT USED) (NOT USED) (NOT USED) (IF EQUIPPED) (W/ SOUND SYSTEM) (GLK-CLASS) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (GLK-CLASS) (IF EQUIPPED) W6/1 W7/2 W7/1 TO FUSE 70 (DIAGRAM 3 OF 5) TO FUSE 73 (DIAGRAM 3 OF 5) FROM FUSE 84 (DIAGRAM 2 OF 5) FROM FUSE 87 (DIAGRAM 2 OF 5) LEFT FRONT SEAT VENTILATION BLOWER REGULATOR SOUND SYSTEM AMPLIFIER CONTROL UNIT RIGHT FRONT SEAT VENTILATION BLOWER REGULATOR MEDIA INTERFACE CONTROL UNIT TO VEHICLE INTERIOR POWER OUTLET (DAIGRAM 2 OF 5) KEYLESS GO CONTROL UNIT VIDEO & RADAR SENSOR SYSTEM CONTROL UNIT WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT COMPENSATOR/CELLULAR TELEPHONE SYSTEM UMTS FROM REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE (DIAGRAM 1 OF 5) FROM FUSE 67 (DIAGRAM 3 0F 5) FROM FUSE 74 (DIAGRAM 3 0F 5) DIAGNOSTIC CONNECTOR TIRE PRESSURE MONITOR CONTROL UNIT REAR BASS SPEAKER AMPLIFIER STATIONARY HEATER UNIT DRIVER SEAT CONTROL UNIT RIGHT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR LEFT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR STATIONARY HEATER RADIO REMOTE CONTROL RECEIVER FRONT PASSENGER SEAT CONTROL UNIT ADAPTIVE DAMPING SYSTEM CONTROL UNIT STEERING COLUMN MODULE CONTROL UNIT
7.5A N M N 15A V U 7.5A 10A 10A 15A 7.5A 30A 15A E D 7.5A P Q 40A 5A 7.5A 7.5A 7.5A M 30A FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE OIL COOLER FAN MOTOR RELAY FANFARE HORN RELAY FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE ENGINE CIRCUIT 87 RELAY SECONDARY AIR INJECTION RELAY C5C 1 1 2 C15M C14M 3 C1M C11C 2 6 C10T 9 13 C7I C1M 4 5 13 1 4 X18-C2 16 C19I 4 6 C16S C11C 14 C8S C11C 4 C2I 5 C9G 10 7 6 8 C2I C5C 3 5 4 8 C5C 1 C13D RED/BRN RED/WHT RED/GRN (OR RED/WHT) RED PNK/BLU BRN PNK/BLU RED/GRY PNK/GRN RED/GRN BLK/BLU NCA RED BLK/BLU PNK/BLU PNK/BLK PNK/YEL RED PNK/GRN PNK/WHT RED/BLU RED/YEL RED/VIO RED/BLU BLU/RED RED RED/GRN RED/BLU FUSE 31B CIRCUIT 15R RELAY CIRCUIT 15 RELAY BACKUP RELAY FUSE 18 FUSE 15 FUSE 31A FUSE 10 FUSE 9 FUSE 21 FUSE 8 FUSE 30 FUSE 29 GLOVE BOX SOCKET FUSE 32 FUSE 16 FUSE 11 FUSE 12 FUSE 13 FUSE 17 (LEFT REAR OF ENGINE COMPT) (LEFT FRONT FOOTWELL) (LEFT REAR OF ENGINE COMPT) (NOT USED) (NOT USED) (IF EQUIPPED) (IF EQUIPPED) (C-CLASS & GLK-CLASS LATE PRODUCTION) (NOT USED) (NOT USED) (W/O NAVIGATION) (IF EQUIPPED) (GLK-CLASS EARLY PRODUCTION) (IF EQUIPPED) (W/ TILTING & SLIDING ROOF) (IF EQUIPPED) W15/5 TO FUSE 15 (DIAGRAM 4 0F 5) TO ENGINE CIRCUIT 87 RELAY (DIAGRAM 4 0F 5) TO FUSE 6 (DIAGRAM 5 0F 5) TO CHASSIS CIRCUIT 87 RELAY (DIAGRAM 5 0F 5) RIGHT FRONT LAMP UNIT FRONT PASSENGER SEAT OCCUPIED RECOGNITION & ACSR WIPER PARK HEATER WIPER MOTOR FROM FRONT ELECTRICAL PREFUSE BOX (DIAGRAM 1 OF 5) INSTRUMENT PANEL SWITCH GROUP LEFT FRONT LAMP UNIT GLOVE BOX LAMP SWITCH UPPER CONTROL PANEL CONTROL UNIT SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT FROM FRONT ELECTRICAL PREFUSE BOX (DIAGRAM 1 OF 5) TO FUSE 14 (DIAGRAM 5 0F 5) FROM FUSE 15 (DIAGRAM 4 0F 5) FROM FUSE 31B (DIAGRAM 4 0F 5) TO FUSE 1 (DIAGRAM 5 0F 5) AUDIO/ COMAND CONTROL PANEL AUTOMATIC AIR CONDITIONING CONTROL & OPERATING UNIT STEERING COLUMN MODULE CONTROL UNIT AUDIO/ COMAND DISPLAY ELECTRONIC SELECTOR LEVEL MODULE CONTROL UNIT NAVIGATION MODULE UPPER CONTROL PANEL CONTROL UNIT MOBILE PHONE ELECTRICAL CONNECTOR OVERHEAD CONTROL PANEL CONTROL UNIT MULTI-FUNCTION CAMERA PANORAMIC SLIDING ROOF CONTROL MODULE
2 2 1 1 1 2 7.5A V P Q 20A 7.5A 10A 5A 7.5A 20A 7.5A 30A 30A 7.5A 25A 40A F U 7.5A 7.5A 20A 10A (OR 20A) 30 DATA 30Z 31 30Z DATA UB 30 CAN-B L CAN-B H CAN-E H CAN-E L FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE FRONT SAM CONTROL UNIT W/ FUSE & RELAY MODULE STARTER CIRCUIT 50 RELAY REAR SAM CONTROL UNIT W/ FUSE & RELAY MODULE ELECTRIC STEERING LOCK CONTROL UNIT 1 11 C2I C5C 11 C10T 10 5 C9G 2 C9G 1 5C 9 C2I C5C 7 C4I 10 4 8 C11C C15M 1 2 C7I 4 3 1 C2I 7 9 C12S 11 6 C7I C11C 2 C6I 5 3 18 C9I 2 10 9 8 7 6 5 4 3 2 1 2 1 B A 1 2 4 3 BRN BRN RED/BLU RED/GRY RED PNK/WHT PNK RED/BLK BRN RED RED RED RED/WHT RED/YEL RED/WHT RED RED/GRY RED/BRN RED/GRN RED/GRN RED/GRN PNK/RED PNK/RED PNK/RED PNK/WHT RED/GRN RED/GRN WHT/RED RED BRN BRN RED GRN RED GRN/WHT BRN/RED WHT/RED RED/GRN BRN RED/GRN CHASSIS CIRCUIT 87 RELAY FUSE 1 FUSE 3 FUSE 20 FUSE 2 FUSE 14 FUSE 19 FUSE 26 FUSE 27 FUSE 28 FUSE 33 FUSE 35 FUSE 34 FUSE 36 FUSE 4 FUSE 5 FUSE 6 FUSE 7 AUTOMATIC TRANSMISSION NEUTRAL POSITION SWITCH ELECTRONIC IGNITION SWITCH CONTROL UNIT (LEFT REAR OF ENGINE COMPT) (LEFT SIDE ENGINE COMPT) (LEFT REAR OF ENGINE COMPT) (LEFT SIDE OF TRUNK/CARGO AREA) (LEFT FRONT FOOTWELL) (C-CLASS: IN CENTER CONSOLE) (TOP OF STEERING COLUMN) (NOT USED) (NOT USED) (NOT USED) (GLK-CLASS) (W/ AUDIO 20), (W/ AUDIO 50) W/ KEYLESS GO W/O KEYLESS GO (NOT USED) C-CLASS W16/3 W15/5 FROM FUSE 16 (DIAGRAM 4 OF 5) FROM FUSE 29 (DIAGRAM 4 OF 5) FROM FUSE 32 (DIAGRAM 4 OF 5) DISTRONIC ELECTRIC CONTROLLER UNIT & ELECTRO HYDRAULIC POWER STEERING INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT FROM FRONT ELECTRICAL PREFUSE BOX (DIAGRAM 1 OF 5) FULLY INTEGRATED TRANSMISSION CONTROL UNIT ME-SFI (ME) CONTROL UNIT RIGHT REAR DOOR CONTROL UNIT FUEL PUMP CONTROL UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT RADIO RADIO W/ AUTO PILOT SYSTEM & COMAND CONTROL UNIT FROM FUSE 29 (DIAGRAM 4 OF 5) ME-SFI (ME) CONTROL UNIT HEADLAMP CONTROL UNIT EXTERIOR LIGHTS SWITCH COMPUTER DATA LINES SYSTEM