Mercedes ML W164 is the second generation of Mercedes-Benz M-class SUVs which were produced in 2005, 2006, 2007, 2008, 2009, 2010, 2011 and 2012 with petrol and diesel engines ML 280 CDI, ML 300, ML 320, ML 350, ML 420, ML 450, ML 500, ML 550, ML 620, ML 63 AMG. During this time, the model has been restyled. This information will also be useful to owners of the Mercedes GL X164 GL 320, GL 350, GL 420, GL 450 and GL 500 4MATIC, since these models have similar electrical circuits. In this article, we will show the locations of electronic control units, a description of the fuses and relays of the Mercedes 164 with box diagrams, photo examples of their execution and locations. Select the fuse responsible for the cigarette lighter.
The location of the blocks and the purpose of the elements in them may differ from those presented and depend on the year of manufacture and the level of electrical equipment. Check the assignment with your diagrams, which are located near the fuse and relay boxes.
Example
Contents
Location
Layout
Assignment
| 1 | ABS electronic control unit |
| 2 | Air conditioning / heater control unit – in the air conditioning / heater control panel |
| 3 | Heater/air conditioner blower motor resistor – near blower motor |
| 4 | Sunlight sensor (air conditioning) / rain sensor (windshield wiper) – upper center windshield |
| 5 | Antenna booster – tailgate |
| 6 | SRS impact sensor, driver’s side |
| 7 | SRS impact sensor, passenger side |
| 8 | Side Impact Sensor, Driver’s Side – Upper B-Pillar |
| 9 | Side impact sensor, passenger side – B-pillar top |
| 10 | Alarm siren |
| 11 | Audio Output Amplifier – Under Seat |
| 12 | Additional heater control unit – behind the wheel arch |
| 13 | Auxiliary heater control unit – under rear left seat |
| 14 | Battery – under the seat |
| 15 | Distance control control unit (cruise – control) |
| 16 | CAN data bus, gateway control unit |
| 17 | Diagnostic connector (DLC) |
| 18 | Differential lock control unit – for hollow luggage compartments |
| 19 | Driver’s door electrical control unit – in the door |
| 20 | Passenger door electrical control unit-in door |
| 21 | Electronic engine control unit, V8 – front legroom |
| 22 | Electronic engine control unit, V6 – top of the engine |
| 23 | Electronic engine control unit, Diesel – behind the wheel arch |
| 24 | Cooling fan motor control unit – in cooling fan motor |
| 25 | Fuel pump control unit, left – under the rear seat |
| 26 | Fuel pump control unit, right – under the rear seat |
| 27 | Fuse/Relay Box, Engine Compartment 1 |
| 28 | Fuse/Relay Box, Engine Compartment 2 |
| 29 | Fuse/Relay Box, Instrument Panel |
| 30 | Fuse/Relay Box, Luggage Compartment – Behind Right Rear Trim Panel |
| 31 | Fuse/Relay Box, Under Seat |
| 32 | Headlight control unit, left (xenon headlights) |
| 33 | Headlight control unit, right (xenon headlights) |
| 34 | Headlight range control unit – under the seat |
| 35 | Sound signal, lion. |
| 36 | Beep, right. |
| 37 | Ignition lock control unit |
| 38 | Instrument cluster control unit |
| 39 | Keyless entry control unit – right side of luggage compartment |
| 40 | Multifunction control unit 1 – footwell – functions: Central locking, power windows, fog lights, headlights, high beams, heated seats, heated windshield washer nozzles, headlight washers, Horns, turn signals, front position, wiper / washer windshield |
| 41 | Multi-Function Control Module 2-in Luggage Compartment Fuse/Relay Box-Functions: Anti-Theft System, Central Locking (Rear), Rear Defroster, Rear Window Wiper/Washer, Headlights (Rear), Turn Signals (Rear), Relay power seats (passenger), brake lights, tailgate control unit, trailer electrical connector |
| 42 | Multifunction control box 3 – in multifunction switch (overhead console) – functions: Anti-theft system, garage door remote control, interior lamps, sunroof, rain sensor (windshield wiper) |
| 43 | Navigation system control unit |
| 44 | Parking system control unit – under the seat |
| 45 | Rear seat folding control unit – under rear left seat |
| 46 | Rear view camera control unit – under the seat |
| 47 | Driver’s seat power control unit – under the seat |
| 48 | Passenger seat power control unit – under the seat |
| 49 | Seat heating control unit – under rear right seat |
| 50 | The control unit of the system for determining the presence of a passenger on the seat – under the seat |
| 51 | Control unit for electrical equipment of the steering column – under the steering wheel |
| 52 | Sunroof electric control unit |
| 53 | SRS electronic control unit |
| 54 | Suspension control unit |
| 55 | Rear door electrical control unit – for hollow luggage compartments |
| 56 | Telephone control unit – under rear left seat |
| 57 | Transfer box control unit |
| 58 | Electronic gearbox control unit – in the gearbox |
| 59 | Electronic transmission control unit (DSG transmission) – on the gearbox |
| 60 | Tire pressure monitoring control unit – on the fuse/relay box in the luggage compartment |
| 61 | Voice activation system unit – under the rear left seat |
| 62 | Lateral movement sensor |
Fuse and relay boxes
Diagram
Designation
- F3 – Fuse box in the instrument panel (passenger side)
- F4 – Fuse and relay box in the luggage compartment
- F32 – Power fuse box in the engine compartment
- F33 – Fuse box in the battery niche
- F37 – AdBlue® fuse box (for engine 642.820 from 1.7.09)
- F58 – Fuse and relay box in the engine compartment
Engine compartment
Fuse and relay box
This box is located on the right side under the hood.
Diagram
Allocation
| 100 | 30A Wiper motor |
| 101 | 15A Suction motor and air conditioning fan with integrated regulator |
| Motors 156: Cable lug electr. circuit terminal 87 M3e | |
| Engines 113: Regeneration changeover valve | |
| Engines 156, 272, 273: Regeneration changeover valve | |
| Engines 272, 273: | |
| Cable lug electr. circuit terminals 87M1e | |
| Suction fan control unit | |
| Engines 629: | |
| CDI system control unit | |
| Cable lug electr. terminal 30 circuits | |
| Suction fan control unit | |
| 164.195 (ML 450 Hybrid): | |
| ME control unit | |
| Plug connection engine/engine compartment | |
| Engines 642 except 642.820: | |
| CDI system control unit | |
| O2 sensor before catalytic converter | |
| Suction fan control unit | |
| Engines 642.820: O2 sensor before catalytic converter | |
| 102 | 15A Engines 642.820 up to 31.7.10: Gearbox oil cooler circulation pump |
| Engines 156: Engine oil cooler circulation pump | |
| 10A 164.195 (ML 450 Hybrid): | |
| Gearbox oil cooler circulation pump | |
| Coolant pump, low temperature circuit | |
| 103 | 25A Cable lug electr. circuit terminals 87M1e |
| CDI system control unit | |
| Before 2008; engines 113, 272, 273: ME control unit | |
| 20A 164.195 (ML 450 Hybrid): ME control unit | |
| Engines 272, 273: ME control unit | |
| 104 | 15A Motors 156, 272, 273: Cable lug electr. circuit terminal 87 M2e |
| Motors 629: Cable lug electr. terminal 87 circuits | |
| Motors 642.820: cable lug electr. circuit terminal 87 D2 | |
| Engines 642 except 642.820: CDI system control unit | |
| 164.195 (ML 450 Hybrid): | |
| Plug-in connection of wiring harness for passenger compartment and engine | |
| Fuse and relay box in the engine compartment | |
| Engines 113: ME control unit | |
| 105 | 15A Engines 156, 272, 273: |
| ME control unit | |
| Cable lug electr. circuit terminal 87 M1i | |
| 629 engines: CDI system control unit | |
| Engines 642.820: | |
| CDI system control unit | |
| Fuel pump relay | |
| Engines 642 except 642.820: | |
| CDI system control unit | |
| Fuel pump relay (since 2009) | |
| Starter (until 2008) | |
| 164.195 (ML 450 Hybrid): Plug-in connection for passenger compartment wiring harness and engine | |
| Motors 113: Shielded el. terminal 15 circuits | |
| 106 | Not used |
| 107 | 40A Engines 156, 272 and 273: Electric air pump |
| 164.195 (ML 450 Hybrid): Plug connection engine/engine compartment | |
| 108 | 40A AIRmatic compressor unit |
| 109 | 25A ESP control unit |
| 164.195 (ML 450 Hybrid): Regenerative brake control unit | |
| 110 | 10A Alarm Siren |
| 111 | 30A Automatic transmission servo drive module for “DIRECT SELECT” system |
| 112 | 7.5A Front left headlight |
| Front right headlight | |
| 113 | 15A Left horn |
| Right horn | |
| 114 | 5A Before 2008: Not used |
| From 2009: SAM control unit, front | |
| 629 engines: CDI system control unit | |
| 115 | 5A ESP control unit |
| 164.195 (ML 450 Hybrid): Regenerative brake control unit | |
| 116 | 7.5A Electrical control module VGS |
| 164.195 (ML 450 Hybrid): Control unit for fully integrated gearbox control system, hybrid | |
| 117 | 7.5A Distronic control unit |
| 118 | 5A Engines 156, 272, 273: ME control unit |
| Engines 629, 642: CDI system control unit | |
| 119 | 5A Engines 642.820: CDI system control unit |
| 120 | 10A Engines 156, 272, 273: |
| ME control unit | |
| Terminal 87 circuit relay, motor | |
| Engines 113: ME control unit | |
| 629 engines: CDI system control unit | |
| Motors 629, 642: Terminal 87 electrical circuit relay, motor | |
| 121 | 20A Heater STH |
| 164.195 (ML 450 Hybrid): Relay and fuse box 2 engine compartment | |
| 122 | 25A Engines 156, 272, 273, 629, 642: Starter |
| Engines 113, 272, 273: ME control unit | |
| 123 | 20A Engines 642: Fuel filter condensation sensor with heating element |
| Engines 629, 642 from 1.9.08: Fuel filter condensation sensor with heating element | |
| 124 | 7.5A Model 164.120/122/822/825 from 1.6.09; 164.121/124/125/824: Electro-hydraulic power steering |
| 164.195 (ML 450 Hybrid): | |
| Electro-hydraulic power steering | |
| Electric air conditioner compressor control unit | |
| 125 | 7.5A 164.195 (ML 450 Hybrid): Power electronics control unit |
| Relay | |
| A | Wiper Mode Relay 1/2 |
| B | Wiper on/off relay |
| C | Engines 642: Additional circulation pump for gearbox oil cooling |
| Engines 156: Coolant circulation pump relay | |
| D | Terminal 87 circuit relay, motor |
| E | Air pump relay |
| F | Horn relay |
| G | Air Suspension Compressor Relay |
| H | Relay terminal 15 |
| I | Starter relay |
Power fuse box
Located behind the fuse and relay box, behind the counter.
Diagram
Appointment
- 4 – Not used
- 5 – 40A 164.195 (ML 450 Hybrid): Regenerative brake system control unit
- 6 – 40A ESP control unit, 80A – 164.195 (ML 450 Hybrid): Electro-hydraulic power steering
- 7 – 100A Suction fan for engine and air conditioner with integrated regulator
- 8 – 150A Before 2008: Engine compartment fuse and relay box, 100A From 2009: Engine compartment fuse and relay box
Passenger compartment
Box in panel
It is located on the right side of the dashboard, behind a protective cover.
Diagram
Decoding
| 10 | 10A Electronic amplifier fan controller |
| 11 | 5A Instrument cluster |
| 12 | 15A Control panel KLA (luxury automatic climate control system) |
| KLA control panel (luxury automatic climate control system) | |
| 13 | 5A Steering column electronic module |
| Upper block control panel | |
| 14 | 7.5A EZS control unit |
| 15 | 5A Electronic compass |
| multimedia interface control unit | |
| 16 | Not used |
| 17 | Not used |
| 18 | Not used |
Box next to battery
Under the passenger seat, on the right side, next to the battery, another fuse box is installed.
Diagram
Assignment
| 78 | 100A Before 30.6.09: Additional PTC heater |
| 150A Before 2008, From 1.7.09: Additional PTC heater | |
| 79 | 60A SAM control unit, rear |
| 80 | 60A SAM control unit, rear |
| 81 | 40A Engines 642.820: AdBlue® supply relay |
| 150A From 1.7.09: Fuse and relay box in the engine compartment (except engines 642.820) | |
| 164.195 (ML 450 Hybrid): Vacuum pump relay (+) | |
| Before 2008: Not used | |
| 82 | 100A Fuse and relay box in luggage compartment |
| 83 | 5A Passenger weight control unit (USA) |
| 84 | 10A SRS control unit |
| 85 | 25A From 2009: DC/AC Converter Control Unit (115V Female Block) |
| 30A Before 2008: Servo drive module for automatic transmission for “DIRECT SELECT” system | |
| 86 | 30A Front panel fuse box |
| 87 | 30A Transfer box control unit |
| 15A 164.195 (ML 450 Hybrid): Relay and fuse box 2 engine compartment | |
| 88 | 70A SAM control unit, front |
| 89 | 70A SAM control unit, front |
| 90 | 70A SAM control unit, front |
| 91 | 40A From 2009: Air recirculation unit of the climate system |
| Before 2008: Fan controller |
Luggage compartment
Fuse and relay box
In the luggage compartment on the right side behind the interior trim there is a box with fuses and relays.
Diagram
Designation
| 20 | 5A Before 2008: Roof Antenna Module |
| Since 2009: Radio Antenna Noise Filter | |
| Since 2009: Mic group control unit (Japan) | |
| 21 | 5A HBF control unit |
| 22 | 5A PTS control unit (park assist) |
| Receiving unit for radio remote control of the auxiliary heater STH | |
| 23 | 10A DVD player |
| Rear audio control unit | |
| Electrical connector mobile phone circuits (Japan) | |
| GSM network compensator 1800 | |
| Bluetooth module | |
| UHI control unit (universal mobile phone interface) | |
| 24 | 40A Front right recessive seat belt pretensioner |
| 25 | 15A Control and display unit COMAND |
| 26 | 25A Front right door control unit |
| 27 | 30A Seat adjustment control unit with memory function, front passenger |
| 28 | 30A Driver’s seat adjustment control unit with |
| memory | |
| 29 | 40A Front left recessive seat belt pretensioner |
| 30 | 40A From 2009: Rear bench seat control unit |
| Engines 156: | |
| Left fuel pump control unit | |
| Right fuel pump control unit | |
| 164.195 (ML 450 Hybrid): Terminal 30 electrical cable termination, fuel pump control unit | |
| 31 | 10A Control unit for heating, seat ventilation and heated steering wheel |
| 32 | 15A AIRMATIC control unit |
| 33 | 25A Keyless-Go system control unit |
| 34 | 25A Front left door control unit |
| 35 | 30A Speaker Amplifier |
| Since 2009: Subwoofer amplifier | |
| 36 | 10A Emergency call system control unit |
| 37 | 5A Reversing camera power supply module (Japan) |
| Reversing camera control unit (Japan) | |
| 38 | 10A Digital TV Tuner |
| Before 2008: Audio interface control unit (Japan) | |
| Since 2009: Combined TV tuner (analog/digital) (Japan) | |
| 164.195 (ML 450 Hybrid): HV battery module | |
| 39 | 7.5A RDK control unit (tire pressure monitoring system) |
| Before 2008: SDAR control unit (USA) | |
| From 2009: High-Definition Tuner Control Unit | |
| From 2009: Digital audio broadcasting control unit | |
| Since 2009: Detachable connection of the outer part of the navigation system (South Korea) | |
| 40 | 40A Before 2008: Tailgate Close Control Module |
| 30A From 2009: Tailgate close control unit | |
| 41 | 25A Ceiling Control Panel |
| 42 | 25A Before 2008: SHD engine |
| Since 2009: Ceiling mounted control panel | |
| 43 | 20A Since 2009; engines 272, 273: Fuel pump control unit |
| Before 05/31/2006: Tailgate wiper motor | |
| From 06/01/2006: Not used | |
| 44 | 20A Before 05/31/2006: 2nd seat row socket, left |
| Up to 05/31/2006: Power socket 2nd row right | |
| From 06/01/2006: Not used | |
| From 2009: Interior socket front (USA) | |
| Since 2009: 115V socket | |
| 45 | 20A Socket in luggage compartment |
| Before 2008: Saloon socket front | |
| From 2009: Power outlet 2nd row right | |
| 46 | 15A Cigarette lighter, front |
| 47 | 10A 164.195 (ML 450 Hybrid): High voltage battery coolant pump |
| Since 2009: Door lights | |
| 48 | 5A From 2009: Rear differential lock control unit |
| Since 2009; engines 642.820: AdBlue supply relay | |
| From 1.7.09; for 164.195, 164.1 with engine 272, and 164.8 with engine 642 or 273: Pyrotechnic disconnecting element | |
| 49 | 30A Heated rear window |
| 50 | 10A Before 05/31/2006: Tailgate wiper motor |
| 15A From 06/01/2006: Tailgate wiper motor | |
| 51 | 5A Carbon canister shut-off valve |
| 52 | 5A Before 5/31/09: Front left reversible seat belt pretensioner |
| Before 5/31/09: Front right reversible seat belt pretensioner | |
| From 2009: Rear differential lock control unit | |
| 53 | 5A AIRMATIC control unit |
| Engines 156: | |
| Left fuel pump control unit | |
| Right fuel pump control unit | |
| Engines 272, 273: Fuel pump control unit | |
| From 2009: Transfer case control unit | |
| 54 | 5A Headlight range control unit (from 06/01/2006) |
| SAM control unit, front | |
| 55 | 7.5A Instrument cluster |
| Rotary switch outdoor lighting | |
| 56 | 5A Before 05/31/2006: Diagnostic connector |
| Engines 642.820: AdBlue® control unit | |
| 164.195 (ML 450 Hybrid): Fuel pump control unit | |
| 57 | 20A Before 2008: Fuel pump with fuel level sensor |
| Fuel pump (except 156 engine) | |
| 58 | 7.5A Diagnostic socket |
| Central interface control unit | |
| 59 | 7.5A From 2009: NECK-PRO headrest solenoid coil on the back of the driver’s seat |
| From 2009: NECK-PRO headrest solenoid coil on right front seat back | |
| 60 | 5A Glove box lighting with micro switch |
| Fuse and relay box in the engine compartment | |
| Rear SAM control unit | |
| Electrical connector mobile phone chain | |
| Detachable connection VICS+ETC power supply (Japan) | |
| Air pump for multicontour seat (since 2009) | |
| Detachable connection of the outer part of the navigation system (South Korea) | |
| Blind spot monitoring electrical plug interior/rear bumper (as of 1.8.10) | |
| Emergency call system control unit (USA) | |
| 61 | 10A Before 2008: |
| Passive safety system control unit | |
| Seat contact strip, front right | |
| 7.5A Since 2009: | |
| Passive safety system control unit | |
| Seat contact strip, front right | |
| 62 | 30A Passenger seat adjustment switch |
| 63 | 30A Driver’s lumbar adjustment control unit |
| Front passenger’s lumbar support adjuster control unit | |
| Driver seat adjustment switch | |
| 64 | Not used |
| 65 | Not used |
| 66 | 30A From 2009: Air pump for multicontour seat |
| 67 | 25A Rear air conditioning fan motor |
| 68 | 25A Before 2008: 2nd row seat cushion heating element, left |
| Before 2008: 2nd row right seat cushion heating element | |
| From 2009: Control unit for heating, seat ventilation and heated steering wheel | |
| 69 | 30A From 2009: Rear differential lock control unit |
| 70 | 20A AHV drawbar connector, 13-pin (since 2009) |
| AHV drawbar connector, 7-pin | |
| 15A AHV drawbar connector, 13-pin (up to 2008) | |
| 71 | 30A Plug connection Elektric-Brake-Control |
| 72 | 15A AHV drawbar connector, 13-pin |
| Relay | |
| K | Up to 05/31/2006: Terminal 15R Socket relay, off-delay |
| From 06/01/2006: Terminal 15R seat adjustment | |
| From 2009: Socket terminal 15R circuit relay (off-delay) (F4kK) (electrical seat adjustment power supply) | |
| L | Relay terminal 30X |
| M | Heated rear window relay |
| N | Relay el. terminal 15 circuits |
| O | Fuel pump relay |
| P | Rear Wiper Relay |
| R | Relay terminal 15R |
| S | Reserve 1 (changeover relay) (front socket power supply) |
| T | From 06/01/2006: Terminal 30 socket 2nd seat row and luggage compartment |
| From 2009: Reserve 2 (NC relay) (power supply for outlets in center and rear) | |
| U | From 06/01/2006: Relay el. terminal 30 circuits (trailer) |
| V | From 06/01/2006: Reserve relay 2 |
The fuse number 46 at 15A is responsible for the operation of the cigarette lighter.
AdBlue fuse box
Near the AdBlue system there is another fuse box responsible for its operation.
Diagram
Allocation
- A – 15A AdBlue® control unit
- B – 20A AdBlue® control unit
- C – 7.5A AdBlue® control unit
- D – Not used
Found a mistake or have something to add – write in the comments.
Fuse for rear seat cigarette lighter.
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