Mercedes·S400·2012 Mercedes S400·Wiring
Wiring diagram

2012 Mercedes S400 — power distribution

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Power distribution

2 1 1 2 A A D Y HV + HV - CAN I H 30C CAN I L 30 87 31 31 25A E K 400A P N 80A 80A 100A 25A 40A 150A 150A B 150A H 150A 150A 80A 125A G J 40A 10A B F 5A 7.5A 7.5A 7.5A M L 7.5A O INTERIOR PREFUSE BOX ON-BOARD ELECTRICAL SYSTEM BATTERY ECO START/STOP FUNCTION DIODE FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE ECO START/STOP FUNCTION C3 C2 C1 I1 3 1 C1 4 3 1 2 20 17 18 19 16 15 13 12 14 10 9 11 C2 C4 C3 1 2 4 3 6 5 8 7 I2 I7 27 12 10 28 I5 2 1 4 3 I8 M1 M2 2 1 MR2 I2 I1 I1 MR1 M3 I3 2 1 MR4 I4 I6 IG2 I3 IG3 I5 IG1 1 C3 4 C2 RELAY & HEATED WINDSHIELD CONTROL UNIT 4 MR1 I1 4 2 C1 4 6 5 RED RED RED RED RED BLU/WHT BLU/WHT RED/BLK RED/ PNK/ RED/BLK NCA YEL NCA BLU BLU/YEL RED/BLK RED BRN NCA NCA RED/BRN RED RED PNK/GRN BRN PNK/RED RED RED GRN BLK BRN BLU BLU BRN BLK GRN BLK BLK RED RED RED RED/WHT RED RED BLK RED RED RED RED RED RED/WHT RED RED/WHT RED RED RED/GRN RED RED (OR RED/BLU) RED RED RED/YEL RED/YEL RED/BLK RED/BLK ENGINE COMPARTMENT PREFUSE BOX DC/DC CONVERTER CONTROL MODULE FUSE 10 FUSE 9 FUSE 5 FUSE 6 FUSE 3 FUSE 8 FUSE 2 FUSE 7 QUIESCENT CURRENT CUTOUT RELAY FUSE 5 FUSE 10 FUSE 3 FUSE 8 FUSE 4 FUSE 6 FUSE 9 FUSE 7 FUSE 54 FUSE 36 FUSE 40 FUSE 37 FUSE 38 FUSE 29 FUSE 39 (3.5L HYBRID) (NOT USED) (W/O MILD HYBRID DRIVE) (W/ MILD HYBRID DRIVE) (NOT USED) IF EQUIPPED (W/ MILD HYBRID DRIVE) (W/ SPECIAL PROTECTION) W/O ECO START/STOP FUNCTION W/ ECO START/STOP FUNCTION (RIGHT FRONT WHEELHOUSE) (RIGHT REAR ENGINE COMPT) (RIGHT FRONT FOOTWELL) (RIGHT FRONT FOOTWELL) (LEFT REAR ENGINE COMPT) W3/9 W15/1 ELECTRIC REFRIGERANT COMPRESSOR POWER ELECTRONICS CONTROL UNIT ESP CONTROL MODULE COMPUTER DATA LINES PYROTECHNICAL SYSTEM SEPARATOR BATTERY MANAGEMENT SYSTEM CONTROL UNIT REGENERATIVE BRAKING SYSTEM CONTROL UNIT GENERATOR ELECTRO- HYDRAULIC POWER STEERING TO FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 1 OF 4) FROM LEFT INSTRUMENT PANEL FUSE BOX (DIAGRAM 3 OF 4) POWER ELECTRONICS CONTROL UNIT, BATTERY MANAGEMENT SYSTEM CONTROL UNIT & ESP CONTROL UNIT COMPUTER DATA LINES SYSTEM TO FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 1 OF 4) ELECTRIC SUCTION FAN ENGINE & A/C W/ INTEGRATED CONTROL FROM FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 3 OF 4) STARTER BATTERY SENSOR VACUUM PUMP RELAY (+) TO REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 3 OF 4) TO REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 2 OF 4) TO RIGHT INSTRUMENT PANEL FUSE BOX (DIAGRAM 2 OF 4) TO LEFT INSTRUMENT PANEL FUSE BOX (DIAGRAM 3 OF 4) TO FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 3 OF 4) TO SPECIAL PROTECTION VEHICLE ADDITIONAL FUSE HOLDER (DIAGRAM 2 OF 4) FROM ENGINE COMPARTMENT PREFUSE BOX (DIAGRAM 1 OF 4) FROM ENGINE COMPARTMENT PREFUSE BOX (DIAGRAM 1 OF 4) STARTER CIRCUIT 15 RELAY TO CIRCUIT 15 RELAY/ SPARE 1 RELAY (CHANGE OVER CONTACT) (DIAGRAM 4 OF 4) TO CHASSIS CIRCUIT 87 RELAY (DIAGRAM 3 OF 4) AIR PUMP RELAY AIR SUSPENSION COMPRESSOR RELAY FANFARE HORN RELAY ENGINE CIRCUIT 87 RELAY WIPER PARK POSITION HEATER RELAY TO CIRCUIT 15R RELAY (DIAGRAM 4 OF 4) TO EIS (EZS) CONTROL UNIT (DIAGRAM 4 OF 4) TO REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 2 OF 4) A/C AIR RECIRCULATION UNIT CENTRAL GATEWAY CONTROL UNIT DATA LINK CONNECTOR UPPER CONTROL PANEL CONTROL UNIT INSTRUMENT CLUSTER
50A (OR 50A) 31 INVERTER 115 AC 30 115 AC2 C 20A U 5A O 25A 15A 10A 15A 30A 7.5A 15A 15A H Q R 30A 40A 40A 7.5A 40A K 30A 15A 40A 5A 5A 7.5A 30A 30A 30A 5A 20A 30A 50A 50A 50A 30A F 20A 5A REAR FUSE BOX I REAR FUSE BOX II REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE AMPLIFIER SOUND 8 7 6 5 4 3 2 1 6 5 3 1 2 EMERGENCY CALL SYSTEM CONTROL UNIT, PAS & SPECIAL SIGNAL SYSTEM CONTROL UNIT & EXTERNAL COMMUNICATION CONTROL UNIT 4 CONTROL UNIT CONTROL UNIT SIGNAL SYSTEM COMMUNICATION & EXTERNAL RELAY (+) PUMP VACUUM CONTROL UNIT UNIT ELECTRONICS POWER CONTROL SYSTEM MANAGEMENT BATTERY SEPARATOR PYROTECHNICAL X1 1 2 4 3 15 I9 I6 PAS & SPECIAL I1 3 1 6 6 I1 3 X2 2 1 C139 C140 C6 C4 C2 C3 C8 C9 C12 C14 C10 C19 C20 C18 C20 C19 2 3 4 1 C13 C16 CONTROL UNIT, EMERGENCY CALL SYSTEM RED/BLK RED/WHT BRN ORG/BLK PNK/GRY ORG/BLU ORG/BLU ORG/BLK PNK/GRY PNK/RED RED/WHT (OR PNK/GRN) PNK/GRN RED/WHT RED/GRN RED RED RED RED RED RED PNK/RED (OR RED/BLU) NCA NCA NCA NCA RED RED/BLU RED/BLK GRY/BLU BRN RED/WHT NCA RED RED RED RED RED RED RED RED RED RED RED/GRY RED RED RED RED RED/WHT RED RED/YEL RED/YEL RED/WHT RED RED RED/YEL RED RED RED RED RED RED RED FUSE 2 FUSE 9 FUSE 7 FUSE 10 FUSE 4 FUSE 10 FUSE 6 FUSE 8 FUSE 1 FUSE 3 FUSE 5 SPECIAL PROTECTION VEHICLE ADDITIONAL FUSE HOLDER FUSE FUSE FUSE FUSE DC/AC CONVERTER CONTROL UNIT FUSE 130 FUSE 131 POWER OUTLET RELAY CIGAR LIGHTER RELAY FUSE 139 FUSE 140 FUSE 117 REAR CIGAR LIGHTER HEATING ELEMENT 115V SOCKET RIGHT INSTRUMENT PANEL FUSE BOX FUSE 88 FUSE 70 FUSE 81 FUSE 76 FUSE 77 FUSE 78 FUSE 80 FUSE 90 FUSE 74 FUSE 89 FUSE 82 FUSE 91 FUSE 87 FUSE 84 FUSE 83 FUSE 71 FUSE 85 FUSE 75 FUSE 72 FUSE 86 FUSE 79 FUSE 73 (NOT USED) (NOT USED) (W/ 115V) (NOT USED) W/ 12V SOCKET W/ 115V SOCKET (NOT USED) (W/ 12V SOCKET) (IF EQUIPPED) (NOT USED) (NOT USED) W/ MILD HYBRID DRIVE IF EQUI- PPED (W/ BANG & OLUFSEN SOUND SYSTEM) IF EQUIPPED (W/ MILD HYBRID DRIVE) (RIGHT FRONT OF TRUNK) (RIGHT FRONT TRUNK) (CENTER FRONT OF TRUNK) (RIGHT REAR FOOTWELL) (UNDER RIGHT SIDE DASH COVER) W54 W17 FROM INTERIOR PREFUSE BOX (DIAGRAM 1 OF 4) CIRCUIT 15 TWO WAY RADIO/FEED IN RELAY CARRIER CIRCUIT 15 TWO WAY RADIO/ FEED IN RELAY CARRIER OUTSIDE SPEAKER INTERFE- RENCE FILTER FIRE EXTINGUISHING SYSTEM CONTROL MODULE SPECIAL VEHICLE MULTI-FUNCTION CONTROL MODULE POWER WINDOW HYDRAULIC PUMP RELAY FROM REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 3 OF 4) FROM FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 1 OF 4) FROM INTERIOR PREFUSE BOX (DIAGRAM 1 OF 4) ME-SFI (ME) CONTROL UNIT & FUEL PUMP CONTROL UNIT POWER ELECTRONICS CIRCULATION PUMP RELAY 1 TO CIRCUIT 15R RELAY (DIAGRAM 4 OF 4) FUEL PUMP RELAY HEATED REAR WNDOW RELAY POWER ELECTRONICS CIRCULATION PUMP RELAY 2 TO CIRCUIT 15 RELAY/ SPARE 1 RELAY (CHANGE OVER CONTACT) (DIAGRAM 4 OF 4) INTERIOR LIGHTS SYSTEM REAR WINDOW ANTENNA AMPLIFIER MODULE ELECTRIC PARKING BRAKE CONTROL UNIT FROM INTERIOR PREFUSE BOX (DIAGRAM 1 OF 4) DIGITAL SOUND PROCESSOR RIGHT REAR DOOR CONTROL MODULE KEYLESS GO CONTROL MODULE LEFT FRONT DOOR CONTROL MODULE TO FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 4 OF 4) RIGHT FRONT DOOR CONTROL MODULE ALARM SIGNAL SIREN LEFT REAR DOOR CONTROL MODULE INTELLIGENT SERVO MODULE FOR DIRECT SELECT TLC (HDS) CONTROL MODULE
25A D C 5A 7.5A Y X W 5A 30A 5A 5A 5A 5A 15A 5A 5A 25A 5A 40A 40A 25A 5A 25A 25A 5A 7.5A 7.5A 5A P 5A 5A 40A 5A 7.5A 7.5A 15A J 7.5A 5A 40A 40A S 25A 25A 7.5A 5A G 7.5A 30A 15A 10A 5A E 15A 15A 15A 10A 25A 7.5A S FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE BACKUP BATTERY FUSE REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE 2 6 I2 1 2 7 I5 I4 7 I1 C147 I4 I2 3 1 13 14 9 C149 4 2 6 I3 7 6 C60 C62 C66 12 I5 2 14 16 15 1 C144 C143 I5 4 3 C141 2 11 I1 1 8 C2 9 5 I2 10 I3 10 C152 C151 C150 C146 C145 C142 C148 RED/BLU RED/BLK RED/BLU RED/WHT RED/BLU RED BRN RED RED RED RED RED/YEL RED/GRN RED/BLK RED/VIO RED/BLK RED/WHT RED/WHT RED/WHT RED/GRN RED RED RED/WHT RED RED/VIO RED RED/WHT RED/YEL RED RED/GRN RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED RED RED/WHT RED/WHT RED/WHT RED/WHT RED RED/WHT RED/YEL RED/WHT RED RED RED/WHT (OR RED) RED/WHT RED/WHT LEFT INSTRUMENT PANEL FUSE BOX FUSE 113 FUSE 112 FUSE 95 FUSE 105 FUSE 109 FUSE 92 FUSE 93 FUSE 104 FUSE 98 FUSE 101 FUSE 102 FUSE 111 FUSE 103 FUSE 110 FUSE 96 FUSE 108 FUSE 107 FUSE 97 FUSE 106 FUSE 100 FUSE 94 FUSE 99 FUSE 53 FUSE 46 FUSE 122 FUSE 121 FUSE 49 FUSE 47 FUSE 50 FUSE 51 FUSE 127 FUSE 20 FUSE 120 FUSE 48 CHASSIS CIRCUIT 87 RELAY FUSE 31 FUSE 35 FUSE 32 FUSE 33 FUSE 62 FUSE 28 FUSE 34 FUSE 66 FUSE 60 FUSE 1 ADDITIONAL BATTERY FUSE 128 FUSE 141 FUSE 149 FUSE 142 FUSE 152 FUSE 146 FUSE 124 FUSE 125 FUSE 143 FUSE 147 FUSE 150 FUSE 123 FUSE 126 FUSE 148 FUSE 129 FUSE 119 FUSE 151 FUSE 144 FUSE 145 (NOT USED) (NOT USED) (NOT USED) (NOT USED) W/ REAR A/C IF EQUIPPED IF EQUIPPED (IF EQUIPPED) (W/ AUDIO/ COMAND DISPLAY) (IF EQUIPPED) W/ NIGHT VIEW ASSIST W/ MILD HYBRID DRIVE (NOT USED) (NOT USED) (W/ STANDARD EQUIPMENT & LUMBER SUPPORT) (NOT USED) (NOT USED) (W/ DYNAMIC SEAT) (W/ MULTICONTOUR SEAT) (W/ MILD HYBRID DRIVE) (W/ AIRMATIC) (W/ ABC) (W/ MILD HYBRID DRIVE) (W/ MILD HYBRID DRIVE) (W/ MILD HYBRID DRIVE) (NOT USED) (W/ PARKTRONIC SYSTEM) (W/ DISTRONIC PLUS) (UNDER LEFT SIDE DASH COVER) (CENTER TRUNK) (LEFT REAR ENGINE COMPT) (RIGHT FRONT FOOT WELL) (CENTER TRUNK) W34 FROM INTERIOR PREFUSE BOX (DIAGRAM 1 OF 4) SPLITVIEW DISPLAY WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT LEFT REAR MULTICONTOUR BACKREST CONTROL MODULE ESP CONTROL MODULE LEFT FRONT SEAT CONTROL MODULE MEDIA INTERFACE CONTROL UNIT TPM CONTROL MODULE RCP (HBF) CONTROL UNIT AUDIO TUNER CONTROL UNIT TO DC/DC CONVERTER CONTROL MODULE (DIAGRAM 1 OF 4) COMAND DISPLAY HIGH DEFINITION TUNER CONTROL UNIT RIGHT REAR MULTICONTOUR BACKREST CONTROL MODULE REAR AIR CONDITIONING ELECTRONIC BLOWER CONTROLLER REAR A/C CONTROL UNIT RIGHT FRONT SEAT CONTROL MODULE RESTRAINT SYSTEMS CONTROL MODULE MEDIA INTERFACE CONTROL UNIT FROM INTERIOR PREFUSE BOX (DIAGRAM 1 OF 4) FROM INTERIOR PREFUSE BOX (DIAGRAM 1 OF 4) MULTI-FUNCTION CAMERA TO FUSE 119 (DIAGRAM 3 FO 4) FROM FUSE 29 (DIAGRAM 1 FO 4) COMAND CONTROL UNIT LUMBER PUMP PNEUMATIC PUMP FOR DYNAMIC SEAT CONTROL MULTICONTOUR SEAT PNEUMATIC PUMP STEERING COLUMN MODULE TRANSMISSION OIL AUXILIARY PUMP CONTROL UNIT ELECTRIC PARKING BRAKE CONTROL UNIT DTR CONTROL UNIT NIGHT VISION ASSIST CONTROL UNIT ME-SFI (ME) CONTROL UNIT ELECTRIC CONTROL UNIT (VGS) TO DC/DC CONVERTER CONTROL MODULE (DIAGRAM 1 OF 4) AIRMATIC W/ ADS CONTROL MODULE TO EIS (EZS) CONTROL UNIT (DIAGRAM 4 OF 4) TO FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 4 OF 4) ABC CONTROL MODULE REGENERATIVE BREAKING SYSTEM CONTROL UNIT AAC (KLA) CONTROL UNIT ELECTRIC REFRIGERANT COMPRESSOR ELECTROHYDRAULIC POWER STEERING FROM FUSE 120 (DIAGRAM 3 FO 4) TO DC/AC CONVERTER CONTROL UNIT (DIAGRAM 2 OF 4) LEFT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR FRONT CENTRAL OPERATING UNIT OVERHEAD CONTROL PANEL CONTROL MODULE FUEL PUMP CONTROL MODULE PANORAMIC SLIDING ROOF CONTROL MODULE REAR SEATS CONTROL MODULE PTS CONTROL MODULE BACKUP CAMERA VOLTAGE SUPPLY MODULE PANORAMIC SLIDING ROOF CONTROL MODULE UNIVERSAL PORTABLE CTEL INTERFACE (UPCI (UHI)) CONTROL MODULE VOICE CONTROL SYSTEM (VCS (SBS)) CONTROL UNIT RIGHT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR RADAR SENSORS CONTROL UNIT (SGR)
7.5A W X V U V 15A CAN EL CAN EH CAN BH CAN BL 31 30 30Z 31 TK ISM 5A (OR 7.5A) T 10A 7.5A 15A 10A 10A 15A M 30A 7.5A 30A T L 7.5A N 7.5A 7.5A R 7.5A 15A Q FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE 1 3 I1 2 I5 8 20 1 3 C136 4 I2 52A 2 1 3 C64 6 B C63 C65 6 4 5 MR2 I1 4 3 2 1 6 A 5 4 2 1 3 5 4 9 2 C2 3 C5 C1 6 9 I2 I1 7 15 3 MR3 4 C61 C137 C138 C133 C135 C134 2 1 GRN PNK/ PNK/ GRN BRN BLU RED/ BLU RED/ RED RED BRN GRY/BLU BRN NCA NCA NCA NCA GRN/YEL GRN GRN/YEL PNK/BLU PNK/BLU RED BRN RED BRN BRN YEL/GRY VIO PNK/RED VIO YEL/GRY YEL/WHT BLK/WHT RED/GRN RED/BLK PNK/GRN GRN/WHT RED BRN/RED YEL/WHT GRN/RED RED/BLK CIRCUIT 15R RELAY CIRCUIT 15 RELAY/ SPARE RELAY 1 (CHANGE OVER CONTACT) FUSE 30 FUSE 26 FUSE 27 FUSE 52B FUSE 63 FUSE 45 FUSE 25 FUSE 64 FUSE 65 12 VOLT CONNECTOR GLOVE COMPARTMENT EIS (EZS) CONTROL UNIT FUSE 43 FUSE 44 FUSE 61 FUSE 42 FUSE 52A FUSE 41 FRONT CIGAR LIGHTER CIRCUIT 15 RELAY/ SPARE 1 RELAY (CHANGE OVER CONTACT) CIRCUIT 15R RELAY FUSE 138 FUSE 137 FUSE 133 FUSE 135 FUSE 134 FUSE 136 POWER ELECTRONICS CIRCULATION PUMP RELAY 1 LUGGAGE COMPAR- TMENT SOCKET W/ MILD HYBRID DRIVE (NOT USED) (IF EQUIPPED) (NOT USED) (W/ ASHTRAY ILLUMINATION) (NOT USED) (NOT USED) (NOT USED) W/ MILD HYBRID DRIVE (LEFT REAR ENGINE COMPT) (LEFT REAR ENGINE COMPT) (LEFT FRONT FOOTWELL) (RIGHT FRONT FOOTWELL) (LEFT FRONT FOOTWELL) (LEFT FRONT FOOTWELL) (CENTER FRONT OF TRUNK) (RIGHT REAR OF TRUNK) W34 W34 W34 W15/1 W7/1 TO FUSE 61 (DIAGRAM 4 OF 4) FROM FUSE 39 (DIAGRAM 1 OF 4) FROM FUSE 40 (DIAGRAM 1 OF 4) FANFARE HORN RELAY TO REAR SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 4 OF 4) FUEL PUMP CONTROL MODULE & ME-SFI (ME) CONTROL MODULE LEFT FRONT HEADLAMP UNIT DRIVER NECK- PRO HEAD RESTRAINT SOLENOID INSTRUMENT CLUSTER RIGHT FRONT HEADLAMP UNIT FRONT PASSENGER NECK-PRO HEAD RESTRAINT SOLENOID FROM FUSE 64 (DIAGRAM 4 OF 4) INTERIOR LIGHTS SYSTEM RESTRAINT SYSTEMS CONTROL UNIT SLAVE WIPER MOTOR FROM BACKUP BATTERY FUSE (DIAGRAM 3 OF 4) FROM FRONT SAM CONTROL MODULE FUSE & RELAY MODULE (DIAGRAM 1 OF 4) COMPUTER DATA LINES SYSTEM FROM RIGHT INSTRUMENT PANEL FUSE BOX (DIAGRAM 2 OF 4) MASTER WIPER MOTOR FROM BACKUP BATTERY FUSE (DIAGRAM 3 OF 4) FROM FUSE 130 (DIAGRAM 2 OF 4) FROM FUSE 131 (DIAGRAM 2 OF 4) FRONT BUMPER LEFT INNER RADAR SENSOR, FRONT BUMPER RIGHT INNER RADAR SENSOR, REAR BUMPER RIGHT OUTER RADAR SENSOR & REAR BUMPER LEFT OUTER RADAR SENSOR FROM FRONT SAM CONTROL MODULE W/ FUSE & RELAY MODULE (DIAGRAM 4 OF 4) EMERGENCY CALL SYSTEM CONTROL UNIT