Fuse Diagram for the A-Class 180 CDI

The fuse box is located on the floor under the upholstery in front of the passenger seat. The diagram is as follows: 21 Valid for diesel engine: PTC heating booster 22 Additional battery relay for ECO on/off function 23 Left front door control unit 24 Right front door control unit 25 SAM control unit 26 Connector sheath for additional battery ECO start/stop 27 Fuse for engine compartment and relay module 28 Sound generator control unit for the vehicle cabin 29 until 11/02/2014: trailer socket from 11/03/2014: trailer recognition control unit 30 Trailer recognition calculator 31 4MATIC: integral traction calculator 32 Steering column tube module calculator 33 Audio panel / COMAND 34 Control unit and ACC command 35 Rear window heater 36 Driver seat lumbar support adjustment calculator 37 Audio display / COMAND 38 Supplemental restraint system control unit 39 Upper control panel control unit 40 Valid for engine 651 (EU6 emission standard): Powertrain ECU 41 Control module for panoramic sunroof 42 Radio (Audio 5 USB, Audio 20 CD, Audio 20 CD with CD changer) COMAND control unit 42 Radio (Radio 20, Audio 20 USB) 43 Parking system control unit 44 Left front reversible emergency divider 45 Right front reversible emergency divider 46 Front passenger seat control unit 47 Front passenger seat lumbar support adjustment control unit 48 Navigation module iPhone® docking station control unit 49 Adaptive damping system calculator 50 Not used - 51 Not used - 52 Not used - 53 Not used - 54 Not used - 55 Communication module for telematics services KEYLESS-GO control unit 56 Steering column tube module calculator 57 Lane Keeping Assist: multifunction computer for special vehicles 57 Special vehicle: multifunction control unit for special vehicles 58 Emergency vehicle fuse box 59 Front passenger seat control unit 60 Driver seat control unit 61 Audio system amplifier control unit 62 Valid for transmission 711: Electric steering anti-theft computer 63 Fuel system control unit 64 Electronic toll calculator Short-range communication dedicated calculator 65 Glove compartment lamp 66 Emergency vehicle fuse box 67 Not used - 68 Not used - 69 Not used - 70 Rear center console socket 71 Trunk socket 72 Front cigarette lighter with ashtray light Power outlet inside the vehicle 73 Electric parking brake control unit 74 Electric parking brake control unit 75 Trailer recognition calculator 76 Trailer recognition calculator 77 Trailer recognition calculator 78 Emergency vehicle fuse box 79 SAM control unit 80 SAM control unit 81 Fan regulator 82 Upper control panel control unit 83 Electronic ignition switch control unit 84 Upper control panel control unit 85 ATA computer [EDW] / towing protection / internal protection 86 FM, AM and CL antenna amplifier [ZV] from 06/01/2016: Antenna amplifier / compensator for cellular phone system 87 Diagnostic connector 88 Instrumentation 89 External lights switch 90 Intelligent radar sensor left rear bumper Intelligent radar sensor right rear bumper 91 Pedal operation monitor switch Floor light switch 92 Fuel system control unit 93 Electric parking brake control unit 94 Supplemental restraint system control unit 95 Front passenger seat occupancy detection and weight detection system computer ACSR (WSS) 96 Tailgate wiper motor 97 Mobile phone electrical connector 98 SAM control unit 99 Tire pressure monitoring calculator 100 Valid for engine 133: DIRECT SELECTION INTERFACE 101 4MATIC: integral traction calculator 102 Radio receiver auxiliary heating Valid for AMG vehicles from 09/01/2015: Transmission mode control unit from 06/01/2016: Antenna switch for phone and auxiliary heating 103 Emergency call system control unit Telematics services communication module HERMES control unit 104 Multimedia interface control unit Multimedia connection unit 105 Digital Audio Broadcast control unit Digital Satellite Radio (SDAR) control unit 105 Tuner 106 Multifunction camera 107 Digital TV tuner 108 until 05/31/2016: rearview camera 108 from 06/01/2016: rearview camera 109 Electric connector for charging socket 110 COMAND radio control unit Engine sound control unit.