ercedes ML W164 is the second generation of Mercedes-Benz M-class SUVs, which was produced in 2005, 2006, 2007, 2008, 2009, 2010, 2011 and 2012 with gasoline 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 undergone restyling. This information will also be useful to owners of Mercedes GL X164 GL 320, GL 350, GL 420, GL 450 and GL 500 4MATIC, because these models have similar electrical circuits. In this article we will show the locations of electronic control units, a description of fuses and relays of the Mercedes 164 with block diagrams, photo examples of their execution and locations. We will highlight the fuse responsible for the cigarette lighter.
The location of the blocks and the purpose of the elements in them may differ from the one presented and depends on the year of manufacture and the level of electrical equipment. Check the purpose with your diagrams, which are located near the blocks with fuses and relays.
Arrangement
Block layout diagram
| № | Description |
|---|---|
| 1 | ABS electronic control unit |
| 2 | Air conditioner/heater control unit – in the air conditioner/heater control panel |
| 3 | Heater/Air Conditioner Blower Motor Resistor – Next to the Blower Motor |
| 4 | Sunlight sensor (air conditioning system) / rain sensor (windshield wiper) – upper center of windshield |
| 5 | Antenna signal booster – rear door |
| 6 | SRS impact sensor, driver’s side |
| 7 | SRS impact sensor, passenger side |
| 8 | Side impact sensor, driver’s side – upper part of the B-pillar |
| 9 | Side impact sensor, passenger side – upper part of the B-pillar |
| 10 | Anti-theft system siren |
| 11 | Audio output amplifier – under the seat |
| 12 | Auxiliary heater control unit – behind the wheel arch |
| 13 | Auxiliary heater control unit – under the rear left seat |
| 14 | Battery – under the seat |
| 15 | Distance 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 the door |
| 21 | Electronic engine control unit, V8 – front footwell |
| 22 | Electronic engine control unit, V6 – upper engine part |
| 23 | Electronic engine control unit, Diesel – behind the wheel arch |
| 24 | Cooling system fan motor control unit – in the cooling system 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 block, engine compartment 1 |
| 28 | Fuse/relay block, engine compartment 2 |
| 29 | Fuse/relay block, dashboard |
| 30 | Fuse/relay block, luggage compartment – behind right rear trim panel |
| 31 | Fuse/relay block, 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 | Audible signal, left. |
| 36 | Audible signal, right. |
| 37 | Ignition lock control unit |
| 38 | Instrument cluster control unit |
| 39 | Keyless entry system control unit – right side of luggage compartment |
| 40 | Multifunction control unit 1 – footwell – functions: Central locking, electric windows, fog lights, headlights, high beam headlights, seat heating, windshield washer nozzle heaters, headlight washers, Horns, turn signals, front indicators, windshield wiper/washer, horn, front indicators, windshield wiper/washer |
| 41 | Multifunction control unit 2 – in the fuse/relay block in the luggage compartment – functions: Anti-theft system, central locking (rear), rear window heater, rear window wiper/washer, front dimensions (rear), turn signals (rear), electric seat relay (passenger), brake lights, rear door control unit, trailer electrical equipment connector |
| 42 | Multifunction control unit 3 – in the multifunction switch (ceiling console) – functions: Anti-theft system, remote control system for garage doors, interior lights, sunroof, rain sensor (windshield wiper) |
| 43 | Navigation system control unit |
| 44 | Parking system control unit – under the seat |
| 45 | Rear seat folding system control unit – under the rear left seat |
| 46 | Rear view camera control unit – under the seat |
| 47 | Driver’s seat electric drive control unit – under the seat |
| 48 | Passenger seat electric drive control unit – under the seat |
| 49 | Seat heating control unit – under the rear right seat |
| 50 | Control unit for the seat occupancy detection system – under the seat |
| 51 | Steering column electrical control unit – under the steering wheel |
| 52 | Electric sunroof control unit |
| 53 | SRS electronic control unit |
| 54 | Suspension control unit |
| 55 | Rear door electrical control unit – for hollow luggage compartments |
| 56 | Phone control unit – under the rear left seat |
| 57 | Transfer case control unit |
| 58 | Electronic gearbox control unit – in the gearbox |
| 59 | Electronic gearbox control unit (DSG gearbox) – on the gearbox |
| 60 | Tire pressure monitoring system control unit – on the fuse/relay block in the luggage compartment |
| 61 | Voice activation system unit – under the rear left seat |
| 62 | Lateral displacement sensor |
Fuse and relay blocks
| № | Description |
|---|---|
| F3 | Fuse box in the instrument panel (passenger side) |
| F4 | Fuse and relay box in the luggage compartment |
| F32 | Engine compartment power fuse box |
| F33 | Fuse box in the battery compartment |
| F37 | AdBlue® fuse box (for engine 642.820 from 1.7.09) |
| F58 | Engine compartment fuse and relay box |
Blocks under the hood
Fuse and relay block
| № | A | Appointment |
|---|---|---|
| 100 | 30 | Slag cleaner motor |
| 101 | 15 | Electric suction fan for engine and air conditioning with integrated regulator |
| Engines 156: Cable lug electrical circuit terminal 87 M3e | ||
| Engines 113: Regeneration switching valve | ||
| Engines 156, 272, 273: Regeneration switching valve | ||
| Engines 272, 273: Cable lug electrical circuit terminal 87M1e Intake fan control unit | ||
| Engines 629: CDI control unit Electrical circuit cable lug terminal 30 Intake 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 the catalytic converter Intake fan control unit | ||
| Engines 642.820: O2 sensor before catalytic converter | ||
| 102 | 15 | Engines 642.820 until 31.7.10: Transmission oil cooler circulation pump |
| Engines 156: Engine oil cooler circulation pump | ||
| 10 | 164.195 (ML 450 Hybrid): Transmission oil cooler circulation pump Low-temperature circuit cooling system pump | |
| 103 | 25 | Cable lug electrical circuit terminal 87M1e CDI system control unit |
| Before 2008; engines 113, 272, 273: ME control unit | ||
| 20 | 164.195 (ML 450 Hybrid): ME control unit | |
| Engines 272, 273: ME control unit | ||
| 104 | 15 | Engines 156, 272, 273: Cable lug electrical circuit terminal 87 M2e |
| Engines 629: Cable lug electrical circuit terminal 87 | ||
| Engines 642.820: Cable lug electrical circuit terminal 87 D2 | ||
| Engines 642 except 642.820: CDI system control unit | ||
| 164.195 (ML 450 Hybrid): Plug connection for interior and engine wiring harness Fuse and relay block in the engine compartment | ||
| Engines 113: ME control unit | ||
| 105 | 15 | Engines 156, 272, 273: ME control unit Cable lug electrical circuit terminal 87 M1i |
| Engines 629: 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 (from 2009) Starter (until 2008) | ||
| 164.195 (ML 450 Hybrid): Plug connection for interior and engine wiring harness | ||
| Motors 113: Cable lug of the protected circuit terminal 15 | ||
| 106 | Not used | |
| 107 | 40 | Engines 156, 272 and 273: Electric air pump |
| 164.195 (ML 450 Hybrid): Plug connection engine/engine compartment | ||
| 108 | 40 | AIRmatic compressor unit |
| 109 | 25 | ESP control unit |
| 164.195 (ML 450 Hybrid): Regenerative braking system control unit | ||
| 110 | 10 | Alarm siren |
| 111 | 30 | Automatic transmission servo module for the “DIRECT SELECT” system |
| 112 | 7,5 | Front left block headlight Front right block headlight |
| 113 | 15 | Left beep Right beep |
| 114 | 5 | Before 2008: Not used |
| From 2009: SAM control unit, front | ||
| Engines 629: CDI system control unit | ||
| 115 | 5 | ESP control unit |
| 164.195 (ML 450 Hybrid): Regenerative braking system control unit | ||
| 116 | 7,5 | VGS electrical control module |
| 164.195 (ML 450 Hybrid): Control unit for fully integrated transmission control system, hybrid | ||
| 117 | 7,5 | Distronic system control unit |
| 118 | 5 | Engines 156, 272, 273: ME control unit |
| Engines 629, 642: CDI system control unit | ||
| 119 | 5 | Engines 642.820: CDI system control unit |
| 120 | 10 | Engines 156, 272, 273: ME control unit Circuit relay terminal 87, engine |
| Engines 113: ME control unit | ||
| Engines 629: CDI system control unit | ||
| Engines 629, 642: Circuit relay terminal 87, engine | ||
| 121 | 20 | STH heater |
| 164.195 (ML 450 Hybrid): Engine compartment relay and fuse block 2 | ||
| 122 | 25 | Engines 156, 272, 273, 629, 642: Starter |
| Engines 113, 272, 273: ME control unit | ||
| 123 | 20 | Engines 642: Fuel filter condensate sensor with heating element |
| Engines 629, 642 from 1.9.08: Fuel filter condensate sensor with heating element | ||
| 124 | 7,5 | 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 Control unit for electric air conditioning compressor | ||
| 125 | 7,5 | 164.195 (ML 450 Hybrid): Power electronics control unit |
| Relay | ||
| A | Wiper operation mode relay 1/2 | |
| B | Wiper on/off relay | |
| C | Engines 642: Additional transmission oil cooling circulation pump | |
| Engines 156: Coolant circulation pump relay | ||
| D | Relay for electrical circuit terminal 87, engine | |
| AND | Air pump relay | |
| F | Horn relay | |
| G | Air suspension compressor relay | |
| H | Relay terminals 15 | |
| I | Starter relay | |
Power fuses
Located behind the fuse and relay block, behind the rack.
| № | A | Appointment |
|---|---|---|
| 4 | Not used | |
| 5 | 40 | 164.195 (ML 450 Hybrid): Regenerative braking system control unit |
| 6 | 40 | ESP control unit, 80A – 164.195 (ML 450 Hybrid): Electro-hydraulic power steering |
| 7 | 100 | Electric suction fan for engine and air conditioning with integrated regulator |
| 8 | 150 | Before 2008: Fuse and relay box in the engine compartment |
| 100 | From 2009: Fuse and relay box in the engine compartment |
Blocks in the cabin
Block in the panel
| № | A | Description |
|---|---|---|
| 10 | 10 | Electronic amplifier fan controller |
| 11 | 5 | Instrument combination |
| 12 | 15 | KLA control panel (automatic climate control system with increased comfort) |
| 13 | 5 | Electronic steering column module |
| Upper control panel | ||
| 14 | 7,5 | EZS control unit |
| 15 | 5 | Electronic compass |
| Multimedia interface control unit | ||
| 16 | Not used | |
| 17 | Not used | |
| 18 | Not used |
Block behind the battery
| № | A | Marking |
|---|---|---|
| 78 | 100 | Until 30.6.09: Additional PTC heater |
| 150 | Before 2008, From 1.7.09: Additional PTC heater | |
| 79 | 60 | SAM rear control unit |
| 80 | 60 | SAM rear control unit |
| 81 | 40 | Engines 642.820: AdBlue® supply relay |
| 150 | From 1.7.09: Fuse and relay block in the engine compartment (except engines 642.820) | |
| 164.195 (ML 450 Hybrid): Vacuum pump relay (+) | ||
| Before 2008: Not used | ||
| 82 | 100 | Fuse and relay box in the luggage compartment |
| 83 | 5 | Passenger mass detection system control unit (USA) |
| 84 | 10 | Passive safety system control unit |
| 85 | 25 | Since 2009: DC/AC converter control unit (115 V socket) |
| 30 | Before 2008: Automatic transmission servo module for the “DIRECT SELECT” system | |
| 86 | 30 | Fuse block in the front panel |
| 87 | 30 | Transfer case control unit |
| 15 | 164.195 (ML 450 Hybrid): Engine compartment relay and fuse block 2 | |
| 88 | 70 | SAM control unit, front |
| 89 | 70 | SAM control unit, front |
| 90 | 70 | SAM control unit, front |
| 91 | 40 | Since 2009: Air recirculation unit of the climate system |
| Before 2008: Fan controller |
Blocks in the trunk
Fuse and relay block
| № | A | Marking |
|---|---|---|
| 20 | 5 | Before 2008: Roof antenna module |
| Since 2009: Radio antenna interference suppression filter | ||
| Since 2009: Microphone group control unit (Japan) | ||
| 21 | 5 | HBF control unit |
| 22 | 5 | PTS control unit (parking system) |
| Receiver unit for remote radio control of the STH autonomous heater | ||
| 23 | 10 | DVD player |
| Rear audio control unit | ||
| Mobile phone circuit connector (Japan) | ||
| GSM 1800 network compensator | ||
| Bluetooth module | ||
| UHI (Universal Mobile Phone Interface) control unit | ||
| 24 | 40 | Front Right Recessed Recessed Seat Belt Tensioner |
| 25 | 15 | COMAND control and display unit |
| 26 | 25 | Front right door control unit |
| 27 | 30 | Seat adjustment control unit with memory function, front passenger |
| 28 | 30 | Driver’s seat adjustment control unit with memory function |
| 29 | 40 | Front Left Recessed Recessed Seat Belt Tensioner |
| 30 | 40 | From 2009: Rear folding multi-seat control unit |
| Engines 156: | ||
| Left fuel pump control unit | ||
| Right fuel pump control unit | ||
| 164.195 (ML 450 Hybrid): Terminal 30 electrical circuit cable end sleeve, fuel pump control unit | ||
| 31 | 10 | Control unit for heating, seat ventilation and steering wheel heating |
| 32 | 15 | AIRMATIC control unit |
| 33 | 25 | Keyless-Go system control unit |
| 34 | 25 | Front left door control unit |
| 35 | 30 | Speaker system amplifier |
| Since 2009: Subwoofer amplifier | ||
| 36 | 10 | Emergency call system control unit |
| 37 | 5 | Reversing camera power supply module (Japan) |
| Reversing camera control unit (Japan) | ||
| 38 | 10 | Digital TV tuner |
| Before 2008: Audio Interface Control Unit (Japan) | ||
| Since 2009: Combined TV tuner (analog/digital) (Japan) | ||
| 164.195 (ML 450 Hybrid): High-voltage battery module | ||
| 39 | 7,5 | RDK control unit (tire pressure monitoring system) |
| Before 2008: SDAR control unit (USA) | ||
| Since 2009: High-Definition tuner control unit | ||
| Since 2009: Digital audio broadcasting system control unit | ||
| Since 2009: Detachable connection of the external part of the navigation system (South Korea) | ||
| 40 | 40 | Before 2008: Tailgate closing control unit |
| 30 | From 2009: Tailgate closing control unit | |
| 41 | 25 | Ceiling control panel |
| 42 | 25 | Before 2008: SHD engine |
| Since 2009: Ceiling-mounted control panel | ||
| 43 | 20 | From 2009; Engines 272, 273: Fuel pump control unit |
| Until 31.05.2006: Tailgate wiper motor | ||
| From 01.06.2006: Not used | ||
| 44 | 20 | Until 31.05.2006: Socket for 2nd row of seats on the left |
| Until 31.05.2006: Socket for 2nd row of seats on the right | ||
| From 01.06.2006: Not used | ||
| Since 2009: Front interior outlet (USA) | ||
| Since 2009: 115V outlet | ||
| 45 | 20 | Socket in the luggage compartment |
| Before 2008: Front interior socket | ||
| From 2009: Socket for 2nd row of seats on the right | ||
| 46 | 15 | Cigarette lighter with light, front |
| 47 | 10 | 164.195 (ML 450 Hybrid): High-voltage battery coolant pump |
| Since 2009: Door lighting | ||
| 48 | 5 | From 2009: Rear differential lock control unit |
| From 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 disconnect element | ||
| 49 | 30 | Heated rear window |
| 50 | 10 | Until 31.05.2006: Tailgate wiper motor |
| 15 | From 01.06.2006: Tailgate wiper motor | |
| 51 | 5 | Coal adsorber shut-off valve |
| 52 | 5 | Before 31.5.09: Front left reversible seat belt tensioner |
| Before 31.5.09: Front right reversible seat belt tensioner | ||
| From 2009: Rear differential lock control unit | ||
| 53 | 5 | AIRMATIC control unit |
| Engines 156: | ||
| Left fuel pump control unit | ||
| Right fuel pump control unit | ||
| Engines 272, 273: Fuel pump control unit | ||
| Since 2009: Transfer case control unit | ||
| 54 | 5 | Headlight range adjustment system control unit (from 01.06.2006) |
| SAM control unit, front | ||
| 55 | 7,5 | Instrument combination |
| Outdoor lighting rotary switch | ||
| 56 | 5 | Until 31.05.2006: Diagnostic connector |
| Engines 642.820: AdBlue® control unit | ||
| 164.195 (ML 450 Hybrid): Fuel pump control unit | ||
| 57 | 20 | Before 2008: Fuel pump with fuel level sensor |
| Fuel pump (except 156 engine) | ||
| 58 | 7,5 | Diagnostic connector |
| Central interface control unit | ||
| 59 | 7,5 | Since 2009: NECK-PRO headrest solenoid coil on the driver’s seat backrest |
| From 2009: NECK-PRO headrest solenoid coil on the right front seat backrest | ||
| 60 | 5 | Glove box lighting with microswitch |
| Fuse and relay block in the engine compartment | ||
| SAM rear control unit | ||
| Mobile phone circuit connector | ||
| VICS+ETC power supply connector (Japan) | ||
| Multi-circuit seat air pump (since 2009) | ||
| Detachable connection of the external part of the navigation system (South Korea) | ||
| Electrical plug connection for blind spot monitoring interior/rear bumper (from 1.8.10) | ||
| Emergency call system control unit (USA) | ||
| 61 | 10 | Until 2008: |
| Passive safety system control unit | ||
| Seat contact strip front right | ||
| 7,5 | Since 2009: | |
| Passive safety system control unit | ||
| Seat contact strip front right | ||
| 62 | 30 | Front passenger seat adjustment switch |
| 63 | 30 | Driver’s lumbar support regulator control unit |
| Front passenger lumbar support regulator control unit | ||
| Driver’s seat adjustment switch | ||
| 64 | Not used | |
| 65 | Not used | |
| 66 | 30 | Since 2009: Multi-contour seat air pump |
| 67 | 25 | Electric fan motor for the rear passenger compartment climate control system |
| 68 | 25 | Before 2008: Heating element of the seat cushion of the 2nd row of seats on the left |
| Before 2008: Seat cushion heating element, 2nd row, right | ||
| From 2009: Control unit for heating, seat ventilation and steering wheel heating | ||
| 69 | 30 | From 2009: Rear differential lock control unit |
| 70 | 20 | AHV towbar connector, 13-pin (from 2009) |
| AHV towbar connector, 7-pin | ||
| 15 | AHV towbar connector, 13-pin (up to 2008) | |
| 71 | 30 | Electrical Brake Control Connector |
| 72 | 15 | AHV towbar connector, 13-pin |
| Relay | ||
| K | Until 31.05.2006: Terminal 15R Socket relay, with off delay | |
| From 01.06.2006: Terminal 15R seat position adjustment | ||
| From 2009: Relay for the electrical circuit of the terminal 15R socket (with a delay in switching off) (F4kK) (power supply for the electric seat adjustment system) | ||
| L | Relay terminals 30X | |
| M | Rear door heater relay | |
| N | Relay electrical circuit terminal 15 | |
| THE | Fuel pump relay | |
| P | Rear wiper relay | |
| R | Relay terminals 15R | |
| S | Reserve 1 (relay with changeover contact) (power supply of the front socket) | |
| T | From 01.06.2006: Terminal 30, socket 2nd row of seats and luggage compartment | |
| Since 2009: Reserve 2 (relay with closing contact) (power supply to sockets in the center and rear) | ||
| IN | From 01.06.2006: Relay of the electrical circuit of terminal 30 (trailer) | |
| In | From 01.06.2006: backup relay 2 | |
Fuse number 46 at 15A is responsible for the operation of the cigarette lighter.
AdBlue system unit
There is another fuse block near the AdBlue system, which is responsible for its operation.
| № | A | Marking |
|---|---|---|
| A | 15 | AdBlue® control unit |
| B | 20 | AdBlue® control unit |
| C | 7,5 | AdBlue® control unit |
| D | Not used |