Mercedes·Gla250·2020 Mercedes GLA250·Wiring
Wiring diagram

2020 Mercedes GLA250 — power distribution

Sheets 6Labels 1368

Power distribution

2 1 2 1 2 1 3 4 4 3 3 4 3 4 3 30A 300A 7.5A W/O HANDS-FREE ACCESS W/ HANDS-FREE ACCESS W/ START/STOP VOLTAGE DIP PROTECTION W/O START/STOP VOLTAGE DIP PROTECTION (OR 250A) 100A A D 25A B 30A C 200A 20A 25A 30A 30A 30A 30A N/A 30A 5A 40A 30 (-) (-) (+) (+) 30G 200A 80A 40A SAM CONTROL UNIT ON-BOARD ELECTRICAL SYSTEM BATTERY STARTER FRONT-END RELAY ALTERNATOR SAM CONTROL UNIT ELECTRICAL POWER STEERING CONTROL UNIT FAN MOTOR BATTERY SENSOR STARTER SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT VEHICLE INTERIOR FUSE BOX ECO START/ STOP FUNCTION ADDITIONAL BATTERY RELAY PANORAMIC SLIDING ROOF CONTROL UNIT FRONT PASSENGER SEAT CONTROL UNIT DRIVER SEAT CONTROL UNIT SOUND SYSTEM AMPLIFIER CONTROL UNIT KEYLESS GO CONTROL UNIT RIGHT FRONT DOOR CONTROL UNIT LEFT FRONT DOOR CONTROL UNIT TRAILER RECOGNITION CONTROL UNIT SAM CONTROL UNIT REAR SWITCHING MODULE SAM CONTROL UNIT 6 X1 2 8 S2 P1 4 X25/13-C1 3 2 1 38 C1 37 S10 33 34 31 B2 32 2 4 6 S3 8 C1 1 S23 S22 C1 3 S21 C1 3 15 X172/2-C1 7 C2 2 S3 7 6 X35/1-C1 1 C3 5 X35/2-C1 1 S6 C3 5 S7 S8 PW1 1 3 B 5 4 6 S5 5 7 2 C1 2 2 PW2 3 E2 A2 A8 E3 UH1 24 1 1 2 2 B A E1 X25/14-C1 12 A2 E1 A1 A4 A3 RED RED/WHT BLK VIO/ WHT/ BLU GRN VIO/BLU WHT/GRN RED/YEL BLK RED RED RED (OR PNK) (OR GRN) WHT/RED WHT/BRN GRN/BRN GRN/RED RED RED (OR PNK) (OR GRN) WHT/RED WHT/BRN GRN/BRN GRN/RED RED/YEL RED/YEL (OR RED/GRN) (OR RED/GRN) RED/WHT RED/WHT (OR RED/GRN) (OR RED/GRN) RED/BLK RED/BLK RED/YEL RED/YEL RED/YEL RED/YEL RED RED/BLK RED/BLK RED/BLK RED RED/WHT RED/WHT RED/GRY RED/WHT RED/BLK RED/GRY RED/WHT RED/BLK RED RED/YEL VIO/WHT BLK RED BLK BLK RED RED BLK BLK BLK RED RED BRN RED RED FRONT ELECTRICAL PREFUSE BOX FUSE 5 FUSE 3 FUSE 2 FUSE 4 FUSE 1 DECOUPLING RELAY PYROFUSE CIRCUIT 30G RELAY FUSE 55 FUSE 24 FUSE 76 FUSE 60 FUSE 59 FUSE 61 FUSE 54 FUSE 25 FUSE 41 FUSE 77 FUSE 22 FUSE 75 FUSE 23 FUSE 27 (LEFT SIDE OF ENGINE COMPT) (LEFT REAR OF ENGINE COMPT) (ON BATTERY POSITIVE (+) POST) (RIGHT FRONT FOOTWELL) (W/ ECO START/STOP FUNCTION) (NOT USED) (NOT USED) W3/2 TO ENGINE COMPARTMENT FUSE & RELAY MODULE (DIAGRAM 2 OF 6) TO FUSE 39 (DIAGRAM 2 OF 6) TO FUSE 110 (DIAGRAM 3 OF 6) TO ENGINE COMPARTMENT FUSE & RELAY MODULE (DIAGRAM 4 OF 6)
2 1 1 2 3 3 4 4 3 3 4 3 3 4 4 30 E C 5 6 6 5 (OR 5A) 7.5A 7.5A 10A 7.5A 5A 5A 5A (OR 5A) 7.5A 7.5A W/O ACTIVE PARK ASSIST W/ ACTIVE PARK ASSIST W/O DISTRONIC PLUS W/ DISTRONIC PLUS W/O STATIONARY HEATER N/A W/ STATIONARY HEATER 30 F A N/A N/A N/A 7.5A N/A N/A 5A 5A 5A 15 25A N/A (-) 15 87 (+) 40A N/A 15A N/A 15A 25A 30 30 (-) 30Z 15 (+) 40A 20A 15A VEHICLE INTERIOR FUSE BOX SAM CONTROL UNIT OVERHEAD CONTROL PANEL CONTROL UNIT STEERING COLUMN MODULE CONTROL UNIT AUTOMATIC AIR CONDITIONING CONTROL & OPERATING UNIT SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT AUDIO/ COMAND DISPLAY CAMERA COVER CONTROL UNIT COMAND FAN MOTOR AUDIO/COMAND CONTROL PANEL ENGINE COMPARTMENT FUSE & RELAY MODULE FANFARE HORN RELAY PARK PAWL CONTROL UNIT CIRCUIT 87 RELAY STARTER CIRCUIT 50 RELAY HEATED WINDSHIELD RELAY WINDSHIELD WIPER ON/ OFF RELAY DUAL CLUTCH TRANSMISSION FULLY INTEGRATED TRANSMISSION CONTROL UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT STATIONARY HEATER UNIT SAM CONTROL UNIT HEADLAMP CONTROL UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT LEFT FRONT LAMP UNIT RIGHT FRONT LAMP UNIT LEFT FRONT LAMP UNIT RIGHT FRONT LAMP UNIT SAM CONTROL UNIT COLLISION PREVENTION ASSIST CONTROLLER UNIT DISTRONIC ELECTRIC CONTROLLER UNIT S1 S2 X120-C1 2 1 S3 2 10 A 6 4 C1 104 3 2 C2 2 X138/1-C1 1 7 C1 16 2 6 4 S1 5 B2 21 P3 11 X26/27-C3 1 X26/27-C2 9 4 9 MR1 6 S4 7 4 2 S4 1 15 4 S3 28 S3 5 1 MR2 11 5 UH2 1 PW2 S13 S14 9 S7 5 C1 S6 1 C1 6 9 9 3 1 S3 2 9 S1 7 25 X213/3-C1 1 8 1 S12 S1 1 3 E1 RED/ (OR RED/BLK) BLK RED/GRN RED/GRN RED/YEL RED/BLK BLK/VIO BLK/RED RED/ BLK RED/ NCA RED/YEL RED/WHT RED/WHT RED/YEL RED/YEL RED/BLU RED/VIO RED/VIO RED RED/WHT BLK/YEL BLK/YEL BRN BLK RED/GRN BLK/BLU RED/GRN RED/YEL BLK RED RED RED/BLK BLK/VIO BLK/RED BLK RED/WHT RED/GRY BLK/YEL RED FUSE 37 FUSE 38 FUSE 33 FUSE 34 FUSE 32 FUSE 39 FUSE 98 FUSE 49 FUSE 50 FUSE 204 FUSE 237 FUSE 202 FUSE 240B FUSE 227 FUSE 240A CIRCUIT 15 RELAY (UNLATCHED) FUSE 232 CIRCUIT 15 RELAY FUSE 224 FUSE 228 FUSE 229 FUSE 223 FUSE 225 FUSE 231 FUSE 233 FUSE 222 FUSE 230 FUSE 203 RESERVE FUSE 210 RESERVE FUSE 221 FUSE 209 FUSE 236 (RIGHT FRONT FOOTWELL) (LEFT SIDE ENGINE COMPT) (LEFT REAR OF ENGINE COMPT) (W/ NAVIGATION) (NOT USED) (NOT USED) (W/ BI-XENON HEADLAMPS) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (NOT USED) (W/ STATIC LED HEADLAMP) (W/ HALOGEN HEADLAMP) (W/ STATIC LED HEADLAMP) (W/ HALOGEN HEADLAMP) W3/2 TO FUSE 47 (DIAGRAM 3 OF 6) FROM FUSE 27 (DIAGRAM 1 OF 6) TO CIRCUIT 87 RELAY (DIAGRAM 4 OF 6) FROM FRONT ELECTRICAL PREFUSE BOX (DIAGRAM 1 OF 6)
2 1 3 3 2 1 3 3 4 4 4 5 5 5A W/O SPORTY ENGINE SOUND W/ SPORTY ENGINE SOUND HERMES UMTS & LTE W/O EMERGENCY CALL/ASSISTANCE SYSTEM & W/ EMERGENCY CALL/ASSISTANCE SYSTEM W/ HERMES UMTS & LTE 7.5A 7.5A (OR 7.5A) J H G 5A 25A 30A 5A 10A 5A 10A 7.5A 5A 5A 10A 10A 40A 40A 40A D 40A 40A N/A 5A E VEHICLE INTERIOR FUSE BOX DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT RIGHT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR LEFT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR DRIVER SEAT CONTROL UNIT MOBILE PHONE CONTACT PLATE CRADLE FOR NAVIGATION MODULE NAVIGATION MODULE COMAND CONTROL UNIT FRONT PASSENGER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT ADAPTIVE DAMPING SYSTEM CONTROL UNIT FRONT PASSENGER SEAT CONTROL UNIT RADIO PARKING SYSTEM CONTROL UNIT ALL-WHEEL DRIVE CONTROL UNIT ALL-WHEEL DRIVE CONTROL UNIT DIAGNOSTIC CONNECTOR HERMES CONTROL UNIT INSTRUMENT CLUSTER STATIONARY HEATER RADIO REMOTE CONTROL RECEIVER SAM CONTROL UNIT EMERGENCY CALL SYSTEM CONTROL UNIT ENGINE SOUND CONTROL UNIT AC HOUSING OVERHEAD CONTROL PANEL CONTROL UNIT ATA (EDW)/ TOWING SENSOR/ INTERIOR MOTION SENSOR CONTROL UNIT TELEMATICS SERVICES COMMUNICATION MODULE UPPER CONTROL PANEL CONTROL UNIT COMAND CONTROL UNIT RADIO 12 S12 C2 15 C1A2 15 X39/37-C2 1 P3 13 S17 S16 C1 47 X1/61-C1 7 S15 X55/4-C5 3 1 C1 18 S14 S13 4 4 7 A2 14 X55/3-C5 3 1 S2 1 C1 18 1 A2 15 1 3 C1 3 5 12 P3 1 C1 27 C1 1 C1 10 14 A 5 12 10 1 8 1 7 4 16 P1 5 S29 C1 3 S28 2 PW1 3 S27 RED/BLK RED/BLK RED/BRN RED/PNK RED/YEL RED/WHT (OR RED/YEL) RED/WHT RED/YEL RED/YEL RED/WHT (OR RED/BLU) (OR RED/BLU) RED/BRN RED/BRN RED RED/BRN RED/BLU RED/BLU RED/BLU RED/BLU RED/GRN RED/GRN RED/BLK RED RED/BLK RED/BLK (OR RED/ORG) RED/BLK (OR RED/ORG) RED/GRN (OR PNK/BLK) (OR PNK/BLK) RED/GRN RED/GRN RED/GRN PNK/BLK RED/GRN RED/WHT RED/BLK RED/BLK RED/BLK RED/ORG RED RED RED/BLK RED/BLU RED RED/YEL RED/WHT RED/WHT RED/GRY RED/GRY RED/BLK RED/BLK RED/BLU RED RED/BLU RED/BLK FUSE 46 FUSE 44 FUSE 48 FUSE 45 FUSE 47 FUSE 36 FUSE 97 FUSE 42 FUSE 83 FUSE 88 FUSE 81 FUSE 87 FUSE 102 FUSE 43 FUSE 80 FUSE 84 FUSE 79 FUSE 110 FUSE 101 FUSE 82 FUSE 85 FUSE 103 (RIGHT FRONT FOOTWELL) (NOT USED) W/O MEMORY W/ MEMORY W/O NAVIGATION W/O MEMORY W/ MEMORY W/ NAVIGATION (IF EQUIPPED) W/O DVD W/ DVD (W/ NAVIGATION) (W/O NAVIGATION) (W/ NAVIGATION) (IF EQUIPPED) (W/O NAVIGATION) (IF EQUIPPED) TO FUSE 99 (DIAGRAM 5 OF 6) FROM FUSE 98 (DIAGRAM 2 OF 6) TO CIRCUIT 15R2 RELAY (DIAGRAM 4 OF 6) FROM FUSE 22 (DIAGRAM 1 OF 6) TO ELECTRONIC IGNITION SWITCH CONTROL UNIT (DIAGRAM 6 OF 6)
1 2 1 2 25A 40A 10A 30A 30A 30 30 W/O ASHTRAY PACKAGE/SMOKER PACKAGE W/ ASHTRAY PACKAGE/SMOKER PACKAGE K J 25A 25A 25A N/A (-) 15R2 (+) 30 (+) 30 B F 5A 25A 5A N/A 7.5A (-) 30 87 (+) 5A ENGINE COMPARTMENT FUSE & RELAY MODULE CIRCUIT 87M RELAY BACKUP RELAY VEHICLE INTERIOR FUSE BOX ELECTRONIC STABILITY PROGRAM CONTROL UNIT ME-SFI (ME) CONTROL UNIT DUAL CLUTCH TRANSMISSION FULLY INTEGRATED TRANSMISSION CONTROL CONTROLLER UNIT STEERING COLUMN MODULE CONTROL UNIT FUEL PUMP CONTROL UNIT ELECTRIC PARKING BRAKE CONTROL UNIT TRUNK LID/ LIFTGATE CONTROL UNIT HEATED REAR WINDOW RELAY SAM CONTROL UNIT 2 2 9 P2 S5 S26 S18 S25 4 3 X36/2-C1 4 C1 1 C1 11 6 C1 13 15 S2 7 C1 5 7 S8 6 F 16 S9 5 3 MR1 6 S3 7 2 1 3 3 1 3 1 2 S5 1 X138/1-C1 5 14 3 1 7 6 S4 B2 17 3 MR2 2 BRN RED/BLK RED RED/BLU RED/GRN RED RED/GRN RED/GRN RED RED/BLU RED/GRN RED RED/BLK RED/BLK RED/BLK RED/YEL RED/YEL GRY/ BRN BLU BRN BLK BRN BLK BLK BRN BRN BLK/WHT BLK/WHT BRN BRN BLK/GRN BRN/GRN BLK/GRN BLK/WHT BLK/WHT RED CIRCUIT 87 RELAY FUSE 217 FUSE 216 FUSE 218 FUSE 219 FUSE 235 FUSE 234 FUSE 56 FUSE 78 FUSE 74 FUSE 73 FUSE 63 CIRCUIT 15R2 RELAY RESERVE FUSE 69 FUSE 72 FUSE 70 FUSE 71 FRONT CIGARETTE LIGHTER W/ ASHTRAY ILLUMINATION ASHTRAY ILLUMINATION CIGARETTE LIGHTER HEATING ELEMENT LUGGAGE COMPARTMENT SOCKET VEHICLE INTERIOR POWER OUTLET REAR CENTER CONSOLE POWER OUTLET (LEFT SIDE ENGINE COMPT) (RIGHT FRONT FOOTWELL) (UNDER LEFT FRONT OF CENTER CONSOLE) (RIGHT FRONT FOOTWELL) (LEFT REAR OF ROOF) (UNDER LEFT FRONT OF CENTER CONSOLE) (UNDER LEFT FRONT OF CENTER CONSOLE) (NOT USED) (NOT USED) (W/ AUTOMATIC REAR-END DOOR) (NOT USED) W12 W15/1 W48 W12 W12 FROM CIRCUIT 15 RELAY (DIAGRAM 2 OF 6) FROM VEHICLE INTERIOR FUSE BOX (DIAGRAM 1 OF 6) FROM FUSE 79 (DIAGRAM 3 OF 6) TO CIRCUIT 15R1 RELAY (DIAGRAM 5 OF 6) INTERIOR LIGHTS SYSTEM
1 2 2 1 3 3 4 4 SEAT RECOGNITION W/O AUTOMATIC CHILD 4 3 W/ NAVIGATION W/O NAVIGATION (OR 7.5A) SEAT RECOGNITION W/ AUTOMATIC CHILD K 7.5A N/A 7.5A N/A 5A 5A 5A 7.5A 5A 5A 5A 5A 5A 15A 15R1 15A (-) 15R1 (+) 30 (-) 15 (+) 30 5A 5A 5A 7.5A 5A G VEHICLE INTERIOR FUSE BOX REAR WINDOW WIPER RELAY TRAILER RECOGNITION CONTROL UNIT EXTERIOR LIGHTS SWITCH TAILGATE WIPER MOTOR SAM CONTROL UNIT ALL-WHEEL DRIVE CONTROL UNIT FUEL PUMP CONTROL UNIT RIGHT REAR BUMPER INTELLIGENT RADAR SENSOR PEDAL OPERATION MONITOR SWITCH ELECTRIC PARKING BRAKE CONTROL UNIT LEFT REAR BUMPER INTELLIGENT RADAR SENSOR FOOTWELL ILLUMINATION SWITCH SPECIAL- PURPOSE VEHICLE INTERFACE 360 DEGREE CAMERA CONTROL UNIT TIRE PRESSURE MONITOR CONTROL UNIT MULTI- FUNCTION CAMERA BACKUP CAMERA CONTROL UNIT FRONT PASSENGER SEAT OCCUPIED RECOGNITION & ACSR TUNER UNIT SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT GLOVE BOX LAMP MEDIA INTERFACE CONTROL UNIT MULTIMEDIA CONNECTION UNIT 9 X55/4-C1 2 S4 1 2 C1 103 4 P2 5 2 10 4 2 S4 X29-C1 2 2 P2 22 6 8 C2 5 X138/1-C5 2 2 10 P2 2 4 X172/2-C1 1 12 4 14 4 4 6 C 1 3 S1 S1 2 B 6 2 5 12 P2 1 B2 48 P1 9 X138/1-C2A A5 C1 A5 10 X138/1-C1 11 C1 4 6 4 8 S11 2 P4 3 2 C3 A5 P3 9 1 (OR BLK) (OR BLU/VIO) (OR BLU/VIO) BLK/GRY BLK/GRY BLK/YEL BRN RED/YEL BLK RED/YEL RED/YEL BLK/GRN BLK/GRN BLK/BLU BLK/BLU BLK/WHT BRN BLK/GRY BLK/GRY BLK/VIO BLK/VIO BLK/GRY BLK/GRY BLK/GRY BLK/YEL BLK/YEL BLK/YEL BLK/YEL BLK/YEL BLK/GRN BLK/GRN BLK BLK BLK BLK BLK BLK BLK/GRN BLK/GRN BLK BLK RED/BLU RED/BLU RED/BLU RED/BLU RED/BLU RED/GRN RED/VIO RED/GRN RED/VIO RED/PNK RED/PNK RED/PNK NCA RED/GRY RED/GRY CIRCUIT 15 RELAY CIRCUIT 15R1 RELAY FUSE 96 FUSE 93 FUSE 68 FUSE 67 FUSE 91 FUSE 89 FUSE 30 FUSE 29 FUSE 90 FUSE 31 FUSE 92 FUSE 65 FUSE 106 FUSE 66 FUSE 99 FUSE 94 FUSE 95 FUSE 108 FUSE 104 FUSE 105 (RIGHT FRONT FOOTWELL) (RIGHT FRONT FOOTWELL) (NOT USED) (NOT USED) (4MATIC) W/O DVD W/ DVD (IF EQUIPPED) W15/1 FROM HEATED REAR WINDOW RELAY (DIAGRAM 4 OF 6) FROM FUSE 97 (DIAGRAM 3 OF 6)
1 2 1 2 W/O START/STOP VOLTAGE DIP PROTECTION W/ START/STOP VOLTAGE DIP PROTECTION W/ ECO START/STOP FUNCTION & W/O ECO START/STOP FUNCTION & H 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 30B 10A SAM CONTROL UNIT VEHICLE INTERIOR FUSE BOX ECO START/ STOP FUNCTION ADDITIONAL BATTERY RELAY LEFT FRONT DOOR CONTROL UNIT DUAL CLUTCH TRANSMISSION FULLY INTEGRATED TRANSMISSION CONTROL CONTROLLER UNIT FM, AM & CL (ZV) ANTENNA AMPLIFIER 3 3 X4/48-C1 S9 13 P1 42 11 B2 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 (OR BLU) (OR BLU) RED BRN RED RED RED BRN RED RED RED RED RED RED/GRN 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 FUSE 26 ADDITIONAL BATTERY ECO START/STOP FUNCTION ADDITIONAL BATTERY ELECTRONIC IGNITION SWITCH CONTROL UNIT (RIGHT FRONT FOOTWELL) (RIGHT FRONT FOOTWELL) (LEFT FRONT OF RIGHT FRONT FOOTWELL) (UNDER LEFT FRONT OF CENTER CONSOLE) (UNDER LEFT FRONT OF CENTER CONSOLE) (IF EQUIPPED) W15/1 W83/2 W12 W12 FROM VEHICLE INTERIOR FUSE BOX (DIAGRAM 3 OF 6) COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM