Mercedes·Gla250·2016 Mercedes GLA250·Wiring
Wiring diagram

2016 Mercedes GLA250 — power distribution

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Power distribution

2 1 2 1 2 1 7.5A (OR 250A) 100A A 100A 7.5A D 30A 25A 20A 25A 7.5A 7.5A 10A G 30A C 7.5A 7.5A 200A 20A 25A 30A 30A 30A 40A 30A N/A 30A 10A 7.5A 40A 30 (-) (-) (+) (+) 30G 5A 5A 150A 5A 30A 30A 200A 125A 70A 300A 80A 40A SAM CONTROL UNIT SAM CONTROL UNIT STARTER FRONT-END RELAY VEHICLE INTERIOR FUSE BOX SAM CONTROL UNIT SAM CONTROL UNIT S19 1 2 A2 A8 E3 A7 UH1 24 1 1 P1 2 2 B A S15 S20 S25 S24 S23 S21 S18 S3 S3 7 S5 E1 3 2 B2 21 P3 3 PW2 4 X25/14-C1 12 S10 34 31 32 B2 33 S2 1 7 S1 A1 A2 5 S5 6 S8 S7 S6 S26 S22 6 7 4 6 8 P3 2 6 5 11 4 3 E1 A1 A5 E2 A4 A3 A6 BLK BLK BLK BLU RED/ (OR RED/ GRN) RED WHT/ RED GRN WHT/ BLU VIO/ BLK RED RED WHT VIO/ BRN BRN BLK RED BRN RED/ GRN RED/ RED/ GRY YEL RED/ YEL RED/ RED WHT BLU RED/ RED GRN RED/ WHT RED/ RED RED BLK RED/ VIO RED/ RED/ RED RED/ BLK RED/ WHT RED/ WHT RED RED/ BLK RED RED/ WHT RED/ BLK BLU RED/ YEL RED/ YEL RED/ BRN WHT/ BRN GRN/ RED GRN/ RED BLK GRN RED/ YEL RED/ FRONT ELECTRICAL PREFUSE BOX FUSE 7 FUSE 5 FUSE 1 FUSE 8 FUSE 2 FUSE 3 FUSE 6 FUSE 4 DECOUPLING RELAY ON BOARD ELECTRICAL SYSTEM BATTERY PYROFUSE CIRCUIT 30G RELAY FUSE 25 FUSE 61 FUSE 56 FUSE 60 FUSE 55 FUSE 54 FUSE 78 FUSE 22 FUSE 75 FUSE 24 FUSE 27 FUSE 59 FUSE 23 FUSE 76 FUSE 77 FUSE 74 FUSE 62 FUSE 33 FUSE 34 FUSE 98 FUSE 39 FUSE 73 FUSE 32 FUSE 37 FUSE 63 FUSE 36 FUSE 58 FUSE 38 FUSE 21 FUSE 46 FUSE 57 (LEFT SIDE OF ENGINE COMPT) (LEFT REAR OF ENGINE COMPT) (ON BATTERY POSITIVE (+) POST) (RIGHT FRONT FOOTWELL) (LEFT SIDE OF ENGINE COMPT) (NOT USED) (NOT USED) (NOT USED) (NOT USED) W/O START/STOP VOLTAGE DIP PROTECTION W/ START/STOP VOLTAGE DIP PROTECTION (NOT USED) (IF EQUIPPED) (IF EQUIPPED) (W/ MEMORY) (IF EQUIPPED) (NOT USED) (NOT USED) (NOT USED) (W/ MEMORY) (IF EQUIPPED) & (W/ MEMORY) (W/O MEMORY) W3/2 W10 FAN MOTOR ALTERNATOR ELECTRICAL POWER STEERING CONTROL UNIT TO ENGINE COMPARTMENT FUSE & RELAY MODULE (DIAGRAM 2 OF 5) BATTERY SENSOR SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT STARTER KEYLESS-GO CONTROL UNIT TRAILER RECOGNITION CONTROL UNIT FRONT PASSENGER SEAT CONTROL UNIT TRUNK LID/LIFT GATE CONTROL UNIT DRIVER SEAT CONTROL UNIT SAM CONTROL UNIT ECO START/ STOP FUNCTION ADDITIONAL BATTERY RELAY RIGHT FRONT DOOR CONTROL UNIT LEFT FRONT DOOR CONTROL UNIT SOUND SYSTEM AMPLIFIER CONTROL UNIT TO ENGINE COMPARTMENT FUSE & RELAY MODULE (DIAGRAM 3 OF 5) STEERING COLUMN MODULE CONTROL UNIT TO FUSE 47 (DIAGRAM 2 OF 5) TO FUSE 110 (DIAGRAM 2 OF 5) STEERING COLUMN MODULE CONTROL UNIT FUEL PUMP CONTROL UNIT FRONT PASSENGER SEAT CONTROL UNIT ELECTRIC PARKING BRAKE CONTROL UNIT OVERHEAD CONTROL PANEL CONTROL UNIT DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT AUDIO/ COMAND DISPLAY SPECIAL-PURPOSE VEHICLE MULTIFUNCTION CONTROL UNIT AUDIO/ COMAND CONTROL PANEL FRONT PASSENGER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT DRIVER SEAT CONTROL UNIT AUTOMATIC AIR CONDITIONING CONTROL & OPERATING UNIT
30 H F E 5A 5A 25A 30A 20A 5A 10A 5A 10A 7.5A 5A 5A 10A 5A 10A 40A 40A 40A D 40A 40A 5A 7.5A 7.5A 30A B A N/A N/A 25A C N/A N/A 7.5A N/A 5A N/A 5A 5A 5A 15 25A N/A (-) 15 87 (+) 40A 5A N/A 5A 15A 7.5A 5A N/A 15A 25A 30 30 (-) 30Z 15 (+) 40A 20A 15A VEHICLE INTERIOR FUSE BOX SAM CONTROL UNIT ENGINE COMPARTMENT FUSE & RELAY MODULE WINDSHIELD WIPER ON/OFF RELAY HEATED WINDSHIELD RELAY STARTER CIRCUIT 50 RELAY FANFARE HORN RELAY SAM CONTROL UNIT SAM CONTROL UNIT 1 2 P4 P3 13 7 S16 1 2 3 5 P3 1 14 12 10 8 7 6 5 P1 S29 PW1 3 2 S27 S28 S14 S13 S12 S3 2 1 S2 6 PW2 1 UH2 5 S4 6 S17 7 2 S3 5 3 4 5 S4 7 3 1 2 S3 4 E1 MR2 1 S1 3 S13 S5 S4 1 6 5 S1 4 S14 S7 S1 1 S12 S6 11 9 MR1 S3 PNK RED/ YEL RED/ YEL) (OR RED/ BLK) (OR RED/ BLU RED/ BRN BRN BLU RED/ GRN RED/ WHT RED/ ORG RED/ RED YEL RED/ WHT RED/ GRY RED/ BLK RED/ VIO RED/ BLU RED/ RED BLK RED/ BLU RED/ BLU RED/ BLU RED/ BRN RED/ WHT RED/ RED GRN RED/ WHT RED/ GRN RED/ RED/ BLK RED/ YEL BLK/ VIO BLK/ RED BLK/ GRN RED/ RED YEL GRY RED/ WHT RED/ BLK BLU BLK/ BRN RED FUSE 47 FUSE 97 FUSE 48 FUSE 100 FUSE 44 FUSE 42 FUSE 45 FUSE 49 FUSE 50 FUSE 41 FUSE 43 FUSE 110 FUSE 103 FUSE 84 FUSE 82 FUSE 85 FUSE 87 FUSE 102 FUSE 109 FUSE 83 FUSE 81 FUSE 80 FUSE 101 FUSE 79 FUSE 88 FUSE 86 CHARGING SOCKET ELECTRICAL CONNECTOR FUSE 237 FUSE 203 FUSE 204 FUSE 202 FUSE 240B FUSE 227 FUSE 240A CIRCUIT 15 RELAY (UNLATCHED) FUSE 232 CIRCUIT 15 RELAY FUSE 229 FUSE 228 FUSE 225 FUSE 233 FUSE 223 FUSE 224 FUSE 226 FUSE 230 FUSE 231 FUSE 221 FUSE 222 FUSE 209 FUSE 236 FUSE 208 FUSE 206 FUSE 207 FUSE 201 (RIGHT FRONT FOOTWELL) (LEFT SIDE ENGINE COMPT) (RIGHT SIDE OF LUGGAGE COMPT) (LEFT REAR OF ENGINE COMPT) (NOT USED) (NOT USED) (W/ AUDIO 20) & (IF EQUIPPED) & (IF EQUIPPED) (W/ BACKUP CAMERA) (W/ ACTIVE PARK ASSIST) (W/ PRESAFE) (W/ PRESAFE) (W/O AUDIO 20) (IF EQUIPPED) (IF EQUIPPED) (NOT USED) (IF EQUIPPED) (4MATIC) (W/ EMERGENCY VEHICLES) (IF EQUIPPED) (W/ ECO START/ STOP FUNCTION) (NOT USED) (NOT USED) (IF EQUIPPED) (W/ STATIC LED HEADLAMP) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (W/ STATIC LED HEADLAMP) W7 W3/2 TO FUSE 99 (DIAGRAM 4 OF 5) FROM FUSE 46 (DIAGRAM 1 OF 5) TO CIRCUIT 15R2 RELAY (DIAGRAM 3 OF 5) RIGHT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR RADIO LEFT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR CAMERA COVER CONTROL UNIT PARKING SYSTEM CONTROL UNIT ADAPTIVE DAMPING SYSTEM CONTROL UNIT IPHONE DRIVE KIT CONTROL UNIT MOBILE PHONE CONTACT PLATE PANORAMIC SLIDING ROOF CONTROL MODULE COMAND CONTROL UNIT COMAND FAN MOTOR FROM FUSE 57 (DIAGRAM 1 OF 5) OVERHEAD CONTROL PANEL CONTROL UNIT STATIONARY HEATER RADIO REMOTE CONTROL RECEIVER INSTRUMENT CLUSTER FM, AM & CL (ZV) ANTENNA AMPLIFIER TO ELECTRONIC IGNITION SWITCH CONTROL UNIT (DIAGRAM 5 OF 5) AC HOUSING UPPER CONTROL PANEL CONTROL UNIT ALL-WHEEL DRIVE CONTROL UNIT ATA (EDW)/TOWING SENSOR/INTERIOR MOTION SENSOR CONTROL UNIT TELEMATICS SERVICES COMMUNICATION MODULE & EMERGENCY CALL SYSTEM CONTROL UNIT DIAGNOSTIC CONNECTOR TO CIRCUIT 87 RELAY (DIAGRAM 3 OF 5) STATIONARY HEATER UNIT RIGHT FRONT LAMP UNIT HEADLAMP CONTROL UNIT FROM FRONT ELECTRICAL PREFUSE BOX (DIAGRAM 1 OF 5) ELECTRONIC STABILITY PROGRAM CONTROL UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT DISTRONIC ELECTRIC CONTROLLER UNIT & COLLISION PREVENTION ASSIST CONTROLLER UNIT LEFT FRONT LAMP UNIT LEFT FRONT LAMP UNIT RIGHT FRONT LAMP UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT
1 2 1 2 K 30 J H 25A 25A 25A N/A (-) 15R2 (+) 30 30 (+) 30 G (+) (+) 15A 10A 15A 20A 7.5A B (-) 30 87M (+) 5A 25A 5A N/A 7.5A (-) 30 87 (+) 5A ENGINE COMPARTMENT FUSE & RELAY MODULE TRANSMISSION OIL COOLING COOLANT CIRCULATION PUMP RELAY BACKUP RELAY HEATED WINDSHIELD RELAY TRANSMISSION OIL COOLING COOLANT CIRCULATION PUMP RELAY VEHICLE INTERIOR FUSE BOX HEATED REAR WINDOW RELAY SAM CONTROL UNIT 1 3 2 X138/1-C1 2 1 3 1 3 S5 S4 14 5 1 3 2 1 7 P2 6 B2 17 3 MR2 3 4 2 5 S2 1 S2 6 MR2 8 S8 7 S2 6 S2 S9 S3 5 3 7 6 MR1 BRN BLK GRY/ BLU BRN BLK WHT BLK/ BRN BRN WHT BLK/ BRN BRN GRN BLK/ GRN BRN/ GRN BLK/ WHT BLK/ BLK RED GRN RED/ WHT RED/ BLU RED/ BLK BRN/ BRN BLK RED/ BLK RED/ YEL RED/ CIRCUIT 87 RELAY CIRCUIT 87M RELAY FUSE 235 FUSE 234 FUSE 211 FUSE 212 FUSE 215 FUSE 213 FUSE 214 FUSE 216 FUSE 219 FUSE 217 FUSE 218 CIRCUIT 15R2 RELAY FUSE 69 FUSE 72 FUSE 70 FUSE 71 FRONT CIGAR LIGHTER W/ ASHTRAY ILLUMINATION ASHTRAY ILLUMINATION CIGARETTE LIGHTER HEATING ELEMENT REAR CENTER CONSOLE POWER OUTLET VEHICLE INTERIOR POWER OUTLET LUGGAGE COMPARTMENT SOCKET (LEFT SIDE ENGINE COMPT) (LEFT REAR OF ENGINE COMPT) (RIGHT FRONT FOOTWELL) (UNDER LEFT FRONT OF CENTER CONSOLE) (LEFT SIDE OF LUGGAGE COMPT) (UNDER LEFT FRONT OF CENTER CONSOLE) (UNDER LEFT FRONT OF CENTER CONSOLE) (NOT USED) (NOT USED) W/ ASHTRAY PACKAGE/SMOKER PACKAGE W/O ASHTRAY PACKAGE/SMOKER PACKAGE (NOT USED) (NOT USED) (IF EQUIPPED) & (IF EQUIPPED) (NOT USED) W3/2 W12 W12 W12 W6 FROM CIRCUIT 15 RELAY (DIAGRAM 2 OF 5) ME-SFI (ME) CONTROL UNIT FAN MOTOR, NOX SENSOR CONTROL UNIT ALTERNATOR, COOLANT THERMOSTAT HEATING ELEMENT, BOOST PRESSURE CONTROL PRESSURE TRANSDUCER, COOLANT PUMP SWITCHOVER VALVE, DIVERT AIR SWITCHOVER VALVE, OXYGEN SENSOR DOWNSTREAM OF CATALYTIC CONVERTER, ENGINE OIL PUMP VALVE, OXYGEN SENSOR UPSTREAM OF CATALYTIC CONVERTER, PARTIAL LOAD OPERATION CRANKCASE VENTILATION VALVE & FULL LOAD OPERATION VENT LINE HEATER ELEMENT ELECTRONIC STABILITY PROGRAM CONTROL UNIT ME-SFI (ME) CONTROL UNIT CYLINDER 1, 2, 3 & 4 IGNITION COILS FROM VEHICLE INTERIOR FUSE BOX (DIAGRAM 1 OF 5) RADIATOR SHUTTERS ACTUATOR DUAL CLUTCH TRANSMISSION FULLY INTEGRATED TRANSMISSION CONTROL CONTROLLER UNIT ME-SFI (ME) CONTROL UNIT TO CIRCUIT 15R1 RELAY (DIAGRAM 4 OF 5) FROM FUSE 79 (DIAGRAM 2 OF 5) TO CIRCUIT 15R1 RELAY (DIAGRAM 4 OF 5) INTERIOR LIGHTS SYSTEM
K 5A J 7.5A N/A 5A N/A 5A 1A 5A 5A 7.5A 5A 5A 5A 5A 5A 15A 15R1 15A 5A (-) 15R1 (+) 30 (-) 15 (+) 30 5A 5A 5A 5A 5A E VEHICLE INTERIOR FUSE BOX REAR WINDOW WIPER RELAY SAM CONTROL UNIT 4 P2 4 5 3 4 2 S4 1 6 8 2 10 P2 12 14 4 S1 3 S1 2 5 P2 P1 P2 1 1 9 B2 12 48 9 10 P4 6 8 3 P3 9 GRY BLK/ BRN YEL RED/ GRN BLK/ BLU BLK/ WHT BLK/ GRY BLK/ VIO BLK/ YEL BLK/ YEL BLK/ GRN BLK/ BLK BLK BLK GRN BLK/ BLK BLU RED/ GRN RED/ VIO RED/ PNK RED/ GRY RED/ CIRCUIT 15 RELAY CIRCUIT 15R1 RELAY FUSE 96 FUSE 31 FUSE 30 FUSE 89 FUSE 29 FUSE 28 FUSE 91 FUSE 90 FUSE 105 FUSE 65 FUSE 94 FUSE 67 FUSE 95 FUSE 93 FUSE 68 FUSE 104 FUSE 108 FUSE 107 FUSE 66 FUSE 92 FUSE 99 FUSE 106 FUSE 64 (RIGHT FRONT FOOTWELL) (RIGHT FRONT FOOTWELL) (NOT USED) (W/ DRIVING SCHOOL PACKAGE) & (W/ TRAILER HITCH) (W/ TRAILER HITCH) (4MATIC) (W/ DRIVING SCHOOL PACKAGE) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (W/ ELECTRONIC INTERFACE, CUSTOMER REQUESTED) (W/ AUTOMATIC CHILD SEAT RECOGNITION) & (IF EQUIPPED) W15/1 FROM HEATED REAR WINDOW RELAY (DIAGRAM 3 OF 5) FROM CIRCUIT 15R2 RELAY (DIAGRAM 3 OF 5) PEDAL OPERATION MONITOR SWITCH TAILGATE WIPER MOTOR TRAILER RECOGNITION CONTROL UNIT EXTERIOR LIGHTS SWITCH TRAILER RECOGNITION CONTROL UNIT LEFT REAR BUMPER INTELLIGENT RADAR SENSOR ALL-WHEEL DRIVE CONTROL UNIT FOOTWHEEL SWITCH FROM FUSE 97 (DIAGRAM 2 OF 5) BACKUP CAMERA SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT FUEL PUMP CONTROL UNIT MEDIA INTERFACE CONTROL UNIT & MULTIMEDIA CONNECTION UNIT ELECTRIC PARKING BRAKE CONTROL UNIT MULTIFUNCTION CAMERA GLOVE BOX LAMP TIRE PRESSURE MONITOR CONTROL UNIT SPECIAL-PURPOSE VEHICLE INTERFACE FRONT PASSENGER SEAT OCCUPIED RECOGNITION & ACSR TUNER UNIT WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT
1 2 1 2 F CAN E2 L 31 CAN D H CAN D L A HF CAN E2 H CAN B L CAN B H CAN E1 H CAN E1 L 30 AUX (+) FT DF 31 PB 30B 10A SAM CONTROL UNIT VEHICLE INTERIOR FUSE BOX LEFT FRONT DOOR CONTROL UNIT DUAL CLUTCH TRANSMISSION FULLY INTEGRATED TRANSMISSION CONTROL CONTROLLER UNIT FM, AM & CL (ZV) ANTENNA AMPLIFIER X4/48-C1 3 42 B2 11 X35/1-C2 C1 3 12 11 10 9 C1 8 7 5 6 4 3 2 1 X25/13-C1 1 2 5 C3 3 C3 8 7 5 6 4 3 2 1 P1 13 S9 RED BRN RED RED GRN RED/ RED RED RED BLU BLU/BLK ORG BRN/RED BLU BLU/WHT GRY GRY/WHT BRN ORG BRN GRN/WHT GRN BLU/BLK BLU RED/YEL BLU/BLK BLU BRN RED RED BRN RED FUSE 26 ADDITIONAL BATTERY ECO START/STOP FUNCTION ADDITIONAL BATTERY ELECTRONIC IGNITION SWITCH CONTROL UNIT (RIGHT FRONT FOOTWELL) (LEFT FRONT OF RIGHT FRONT FOOTWELL) (RIGHT FRONT FOOTWELL) (UNDER LEFT FRONT OF CENTER CONSOLE) (UNDER LEFT FRONT OF CENTER CONSOLE) W83/2 W15/1 W12 W12 W/ START/STOP VOLTAGE DIP PROTECTION W/O START/STOP VOLTAGE DIP PROTECTION ECO START/ STOP FUNCTION ADDITIONAL BATTERY RELAY FROM VEHICLE INTERIOR FUSE BOX (DIAGRAM 2 OF 5) COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM