Mercedes-Benz ML550 2009 - 2009 MERCEDES-BENZ ML320, ML350, ML550 & ML63 AMG

Mercedes-Benz ML550 2009 - BUZZERS, RELAYS & TIMERS

Mercedes-Benz ML550 2009 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
AdBlue Supply Relay (K27/7)	Rear cargo area. See Fig. 268.
AIR Pump Relay (E)	On engine compartment fuse & relay box. See Fig. 63.
Air Suspension Compressor Relay (G)	On engine compartment fuse & relay box. See Fig. 63.
Circuit 15 Relay (H)	On engine compartment fuse & relay box. See Fig. 63.
Circuit 15 Relay (N)	On load compartment fuse & relay box. See Fig. 60.
Circuit 15R Relay (R)	On load compartment fuse & relay box. See Fig. 60.
Coolant Circulation Pump Relay (C)	On engine compartment fuse & relay box. See Fig. 63.
Engine Circuit 87 Relay (D)	On engine compartment fuse & relay box. See Fig. 63.
Fanfare Horn Relay (F)	On engine compartment fuse & relay box. See Fig. 63.
Fuel Pump Relay Module (O)	On load compartment fuse & relay box. See Fig. 60.
Rear Window Defroster Relay (M)	On load compartment fuse & relay box. See Fig. 60.
Rear Wiper Relay (P)	On load compartment fuse & relay box. See Fig. 60.
Socket Circuit 15R Relay (With Run-On) (K)	On load compartment fuse & relay box. See Fig. 60.
Starter Relay (I)	On engine compartment fuse & relay box. See Fig. 63.
Trailer Circuit 30X Relay (L)	On load compartment fuse & relay box. See Fig. 60.
Wiper Level 1/2 Relay (A)	On engine compartment fuse & relay box. See Fig. 63.
Wiper ON/OFF Relay (B)	On engine compartment fuse & relay box. See Fig. 63.

Mercedes-Benz ML550 2009 - CIRCUIT PROTECTION DEVICES

Mercedes-Benz ML550 2009 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Battery Compartment Prefuse Box	Under right front seat.
Cockpit Fuse Box	Behind right end of dash.
Engine Compartment Fuse & Relay Box	Right side of engine compartment. See Fig. 62.
Front Prefuse	Right rear of engine compartment. See Fig. 61.
Load Compartment Fuse & Relay Box	Right rear of cargo area. See Fig. 59.

Mercedes-Benz ML550 2009 - CONTROL UNITS

Mercedes-Benz ML550 2009 CONTROL UNITS LOCATION

Component	Location
AdBlue Control Unit (K118/5)	Rear cargo area. See Fig. 268.
Airmatic Control Unit	Under front of driver seat.
Backup Camera Voltage Supply Module	Under spare tire compartment liner. See Fig. 89.
Blower Regulator	On bottom of blower motor.
Booster Blower Electronic Blower Controller	On blower motor.
Central Gateway Control Module	Under driver seat. See Fig. 93.
Driver Front Seat Adjustment Control Module With Memory	Under driver seat.
DTR Control Unit	Behind front bumper.
Electronic Compass	Behind instrument cluster. See Fig. 44.
Emergency Call System Control Unit	Under left seat of 2nd seat row.
ESP Control Module	Left front corner of engine compartment.
Folding Rear Bench Seat Control Unit	Under left seat of 2nd seat row. See Fig. 88.
Front Passenger Front Seat Adjustment Control Module With Memory	Under front passenger seat.
Front SAM Control Unit	Under right front seat. See Fig. 84.
Headlamp Range Adjustment Control Module	Under right front seat. See Fig. 90.
HRA (LWR) Power Module (Left/Right)	Inside rear of respective headlight assembly.
HS (SIH) Seat Ventilation & Steering Wheel Heater Control Unit	Under left seat of 2nd seat row. See Fig. 87.
Keyless Go Control Module	Right side of cargo area.
Left Front Door Control Module	In left front door.
Left Front Seat Ventilation Blower Regulator	In driver seat back.
Left Fuel Pump Control Unit	Under right seat of 2nd seat row. See Fig. 94.
ME-SFI (ME) Control Module	Top center of engine.
Multifunction Steering Wheel Electronics Unit	Inside steering wheel. See Fig. 10.
PTS Control Module	Under left front seat.
Rear AC Blower Regulator	On rear blower motor.
Rear Audio Control Unit	Under rear of driver seat.
Rear Axle Differential Lock Control Module	Under left seat of 3rd seat row.
Rear-End Door Closing Control Module	Right rear of trunk, under carpet.
Rear SAM Control Module	Right rear of cargo area. See Fig. 85.
Restraints System Control Module	Under center console.
Right Front Door Control Module	In right front door.
Right Front Seat Ventilation Blower Regulator	In front passenger seat back.
Right Fuel Pump Control Unit	Under right seat of 2nd seat row.
SDAR Control Unit	Under left seat of 2nd seat row. See Fig. 92.
Steering Column Module	Top of steering column. See Fig. 91.
TPM Control Module	Right side of cargo area.
TPM (RDK) Control Module	Right rear of cargo area.
Traction System Hydraulic Unit	Left front of engine compartment. See Fig. 1.
Transfer Case Control Module	Under front passenger seat.
Transfer Case Control Module	Under right front seat.
Universal Portable CTEL Interface (UPCI (UHI)) Control Module	Under left seat of 2nd seat row.
WSS Control Unit (Weight Sensing System)	On right front seat frame. See Fig. 83.
Xenon Headlamp Control Module (Left/Right)	Behind respective headlamp.
Xenon Headlamp Ignition Module (Left/Right)	Behind respective headlamp.
Xenon Headlamp Ignition Module (Left/Right)	Inside rear of respective headlight assembly.

Mercedes-Benz ML550 2009 - MOTORS

Mercedes-Benz ML550 2009 MOTORS LOCATION

Component	Location
AIRmatic Compressor Unit	Behind right side of front bumper. See Fig. 3.
Air Pump	Front of engine.
Backrest Angle Adjustment Motor (Driver)	In driver seat back.
Backrest Angle Adjustment Motor (Front Passenger)	In front passenger seat back. See Fig. 77.
Blower Motor	Under right side of dash.
Booster Blower Motor	Rear of center console.
Coolant Circulation Pump	In left front wheelwell. See Fig. 73.
Diverter Flap Actuator Motor (M16/27)	On HVAC unit. See Fig. 69.
Driver Door CL Motor	Rear of driver door.
Dynamic Cornering Lamp Motor (Left/Right)	Inside rear of respective headlight assembly.
Electric Suction Fan Engine & AC With Integrated Control	Behind radiator.
Fresh Air/Air Recirculation Flaps Actuator Motor (M2/5)	On HVAC unit. See Fig. 69.
Front Seat Height Adjustment Motor (Driver)	In driver seat back.
Front Seat Height Adjustment Motor (Front Passenger)	Under front passenger seat.
Front Throttle Valve Actuator (M16/3)	In cylinder head. See Fig. 74.
Fuel Filler Flap CL Motor	In right rear wheelwell.
HCS Pump	On washer fluid reservoir.
Headlamp Range Adjustment Motor (Left/Right)	Inside rear of respective headlight assembly.
Head Restraint Motor (Driver)	In driver seat back.
Head Restraint Motor (Front Passenger)	In front passenger seat back.
High Pressure & Return Pump	Inside hydraulic unit.
Inlet Port Shutoff Motor	Top center of engine. See Fig. 81.
Intelligent Servo Module (DIRECT SELECT)	On transmission housing. See Fig. 11.
Left Blending Air Flap Actuator (M2/6)	On HVAC unit. See Fig. 69.
Left Center Air Flap Actuator Motor (M16/23)	On HVAC unit. See Fig. 69.
Left Defroster Vent Flap Actuator Motor (M2/8)	On HVAC unit. See Fig. 69.
Left Electrically Adjustable & Heated Exterior Mirror	On driver door.
Left Folding Backrest Motor	Under left seat of 3rd seat row.
Left Footwell Flap Actuator Motor (M2/10)	On HVAC unit. See Fig. 69.
Left Front Power Window Motor	Center of left front door.
Left Front Reversible Emergency Tensioning Retractor	Base of left "B" pillar.
Left Front Seat Backrest Ventilation Motor Group	In driver seat back.
Left Front Seat Cushion Ventilation Motor Group	Under driver seat.
Left Fuel Pump (M3/2)	Top of fuel tank. See Fig. 71.
Left Rear Door CL Motor	Rear of left rear door.
Left Rear Power Window Motor	Center of left rear door.
Left Vent Window Motor	In left "D" pillar.
Lumbar Pump	Left rear of cargo area. See Fig. 77.
Mirror Fold-In Motor (Left/Right)	Integral to respective rearview mirror.
Mirror In/Out Adjustment Motor (Left/Right)	Integral to respective rearview mirror.
Mirror Up/Down Adjustment Motor (Left/Right)	Integral to respective rearview mirror.
Pneumatic Pump For Dynamic Seat Control	Left rear of cargo area. See Fig. 78.
Rear Air Conditioning Blower Motor	Left side of cargo area. See Fig. 70.
Rear Air Conditioning Refrigerant Shutoff Motor	Left side of cargo area. See Fig. 75.
Rear Air Distribution Flap Actuator Motor (M2/21)	On HVAC unit. See Fig. 69.
Rear Axle Differential Actuator Motor	On differential. See Fig. 82.
Rear Door Hydraulic Pump	Right rear of cargo area. See Fig. 80.
Rear Seat Height Adjustment Motor (Driver)	In driver seat back.
Rear Seat Height Adjustment Motor (Front Passenger)	Under front passenger seat.
Rear Shutoff Flap Actuator Motor (M2/12)	On HVAC unit. See Fig. 69.
Rear Throttle Valve Actuator (M16/4)	In cylinder head.
Right Blending Air Flap Actuator (M2/7)	On HVAC unit. See Fig. 69.
Right Center Air Flap Actuator Motor (M16/24)	On HVAC unit. See Fig. 69.
Right Defroster Vent Flap Actuator Motor (M2/9)	On HVAC unit. See Fig. 69.
Right Electrically Adjustable & Heated Exterior Mirror	On front passenger door.
Right Folding Backrest Motor	Under right seat of 3rd seat row.
Right Footwell Flap Actuator Motor (M2/11)	On HVAC unit. See Fig. 69.
Right Front Door CL Motor	Rear of right front door.
Right Front Power Window Motor	Center of right front door.
Right Front Reversible Emergency Tensioning Retractor	Base of right "B" pillar.
Right Front Seat Backrest Ventilation Motor Group	In front passenger seat back.
Right Front Seat Cushion Ventilation Motor Group	Under front passenger seat.
Right Fuel Pump (M3)	Under right seat of 2nd seat row. See Fig. 14.
Right Rear Door CL Motor	Rear of right rear door.
Right Rear Power Window Motor	Center of right rear door.
Right Vent Window Motor	In right "D" pillar.
Seat Fore/Aft Adjustment Motor (Driver)	In driver seat back.
Seat Fore/Aft Adjustment Motor (Front Passenger)	Under front passenger seat.
Starter	Left side of engine.
Steering Column Forward/Back Motor (M20/1)	On steering column. See Fig. 76.
Steering Column Raise/Lower Motor (M20/2)	On steering column. See Fig. 76.
Tailgate Wiper Motor	Center of tailgate.
Throttle Valve Actuator (V6)	On throttle body.
Throttle Valve Actuator (V8)	Rear of intake manifold.
Tilting/Sliding Roof (SR (SHD)) Drive Unit	Front center of roof. See Fig. 72.
Transfer Case Actuator Motor	On transfer case. See Fig. 79.
Windshield Washer Fluid Pump	On washer fluid reservoir.
Wiper Motor	Rear of engine compartment.

Mercedes-Benz ML550 2009 - SENDING UNITS & SENSORS

Mercedes-Benz ML550 2009 SENDING UNITS & SENSORS LOCATION

Component	Location
Accelerator Pedal Sensor	At top of accelerator pedal.
Actual Value Potentiometer (Sliding Contact 1)	Center rear of engine.
Actual Value Potentiometer (Sliding Contact 2)	Center rear of engine.
Ambient Temperature Display Temperature Sensor	Behind left side of front bumper.
Camshaft Hall Sensor (M642)	Top right front of engine. See Fig. 19.
Center Left Front PTS Ultrasonic Sensor	Left side of front bumper.
Center Rear Interior Temperature Sensor	Under right rear of center floor console.
Center Right Front PTS Ultrasonic Sensor	Right side of front bumper.
Charge Air Temperature Sensor	Right front of engine. See Fig. 34.
Charge Pressure Sensor	Right front of engine. See Fig. 17.
Coolant Temperature Sensor (M272 & M273)	Left rear of engine. See Fig. 30.
Coolant Temperature Sensor (M642)	Top left side of engine. See Fig. 31.
Crankshaft Hall Sensor	Rear of left cylinder bank.
Crankshaft Position Sensor (V8)	Rear of left cylinder bank.
Dew Point Sensor	Under right side of dash, near blower motor.
Driver-Side Frontal Acceleration Sensor	Left front of engine compartment. See Fig. 53.
Dual Sun Sensor	Top center of dash.
Emissions Sensor	Right rear corner of engine compartment. See Fig. 50.
ESP Brake Pressure Sensor	On brake master cylinder. See Fig. 51.
Evaporator Temperature Sensor	Under center of dash. See Fig. 26.
Exhaust Back Pressure Sensor	Rear of engine, in exhaust. See Fig. 57.
Front Door Pressure Sensor (Driver Side)	In driver door.
Front Door Pressure Sensor (Front Passenger's Side)	In right front door.
Fuel Filter Water Level Sensor	Top rear of engine. See Fig. 58.
Fuel Pressure Sensor	Front of left fuel rail. See Fig. 16.
Fuel Tank Pressure Sensor	In fuel tank.
Fuel Temperature Sensor	Top left front of engine. See Fig. 55.
Hall Sensor 1 (Sliding Roof)	Integral to tilting/sliding roof drive unit.
Hall Sensor 2 (Sliding Roof)	Integral to tilting/sliding roof drive unit.
Hot Film MAF Sensor	Center rear of engine.
Inner Left Front PTS Ultrasonic Sensor	Left center of front bumper.
Inner Left Rear PTS Ultrasonic Sensor	Left side of rear bumper.
Inner Right Front PTS Ultrasonic Sensor	Right center of front bumper.
Inner Right Rear PTS Ultrasonic Sensor	Right side of rear bumper.
Intake Air Temperature Sensor	Rear of engine. See Fig. 33.
Left Center Outlet Temperature Sensor	Behind center of dash. See Fig. 29.
Left Exhaust Camshaft Hall Sensor (M156)	Left front of engine. See Fig. 24.
Left Exhaust Camshaft Hall Sensor (M272 & M273)	Left front of engine. See Fig. 23.
Left Footwell Temperature Sensor	Under left center of dash.
Left Front Body Lateral Acceleration Sensor	Top of left front shock tower. See Fig. 39.
Left Front Level Sensor	In left front wheelwell. See Fig. 36.
Left Fuel Level Sensor (B4/1)	Under left seat of 2nd seat row. See Fig. 14.
Left Hot Film MAF Sensor (M156)	Top left rear of engine. See Fig. 13.
Left Intake Camshaft Hall Sensor (M156)	Left front of engine. See Fig. 21.
Left Intake Camshaft Hall Sensor (M272 & M273)	Left front of engine. See Fig. 20.
Left Intake Manifold Position Flap Position Sensor (V6)	Left side of intake manifold. See Fig. 48.
Left Knock Sensor 1 (M156)	Left side of engine.
Left Knock Sensor 2 (M272 & M273)	Under intake manifold.
Left O2 Sensor Downstream TWC (KAT)	Left of transmission. See Fig. 67.
Left O2 Sensor Upstream TWC (KAT)	Left of transmission. See Fig. 65.
Left Rear Level Sensor	Under left rear of vehicle. See Fig. 35.
Left Side Airbag Sensor	Base of left "B" pillar. See Fig. 7.
Left Side Outlet Temperature Sensor	Under left side of dash. See Fig. 28.
Micromechanical Turn Rate Sensor AY Pickup	On floor, under right front seat. See Fig. 42.
Oil Sensor (Oil Level, Temperature & Quality)	Lower right front of engine. See Fig. 52.
Oil Temperature Sensor (M156)	Lower left front of engine.
Oil Temperature Sensor (M642)	Left side of engine oil pan.
Outer Left Front PTS Ultrasonic Sensor	Left corner of front bumper.
Outer Left Rear PTS Ultrasonic Sensor	Left corner of rear bumper.
Outer Right Front PTS Ultrasonic Sensor	Right corner of front bumper.
Outer Right Rear PTS Ultrasonic Sensor	Right corner of rear bumper.
O2 Sensor 1 Upstream TWC (KAT)	Under right side of engine. See Fig. 64.
Passenger-Side Frontal Acceleration Sensor	Right front of engine compartment. See Fig. 54.
Pedal Value Sensor	In left rear corner of engine compartment.
Pressure Differential Sensor (DPF)	On rear of differential. See Fig. 265.
Pressure Sensor (Air Cleaner) (M642)	Downstream of air cleaner. See Fig. 47.
Pressure Sensor (M156)	Top right side of engine. See Fig. 46.
Pressure Sensor (M272 & M273)	Top left side of engine. See Fig. 45.
Rail Pressure Sensor	Rear of right fuel rail. See Fig. 15.
Rear Air Conditioning Evaporator Temperature Sensor	On rear HVAC unit. See Fig. 27.
Rear Door Pressure Sensor (Driver Side)	In left rear door.
Rear Door Pressure Sensor (Passenger's Side)	In right rear door.
Rear-End Door Closing Obstruction Sensor Strip (Left/Right)	At respective "D" pillar.
Rear-End Door Opening Angle Recognition Sensor	Right rear of roof. See Fig. 43.
Rear Headroom AC Temperature Sensor	Top of left "C" pillar.
Refrigerant Pressure Sensor	In left front wheelwell. See Fig. 32.
Right Center Outlet Temperature Sensor	Behind center of dash.
Right Exhaust Camshaft Hall Sensor (M156)	Right front of engine. See Fig. 25.
Right Exhaust Camshaft Hall Sensor (M272 & M273)	Right front of engine.
Right Footwell Temperature Sensor	Under right center of dash.
Right Front Body Lateral Acceleration Sensor	Top of right shock tower. See Fig. 40.
Right Front Level Sensor	In right front wheelwell. See Fig. 37.
Right Fuel Level Sensor (B4/2)	Under right seat of 2nd seat row. See Fig. 14.
Right Hot Film MAF Sensor (M156)	Top right rear of engine.
Right Intake Camshaft Hall Sensor (M156)	Right front of engine. See Fig. 22.
Right Intake Camshaft Hall Sensor (M272 & M273)	Right front of engine.
Right Intake Manifold Position Flap Position Sensor (V6)	Right side of intake manifold. See Fig. 49.
Right Knock Sensor 1 (M156)	Right side of engine. See Fig. 12.
Right Knock Sensor 1 (M272)	Under intake manifold. See Fig. 4.
Right Knock Sensor 1 (M273)	Under intake manifold. See Fig. 5.
Right O2 Sensor Downstream TWC (KAT)	Right of transmission. See Fig. 68.
Right O2 Sensor Upstream TWC (KAT)	Right of transmission. See Fig. 66.
Right Rear Body Lateral Acceleration Sensor	At right side of cargo area. See Fig. 41.
Right Rear Level Sensor	In right rear wheelwell. See Fig. 38.
Right Side Airbag Sensor	Base of right "B" pillar. See Fig. 8.
Right Side Outlet Temperature Sensor	Under right side of dash.
Steering Angle Sensor	Part of steering column module.
Sun Sensor	Top center of dash.
Temperature Sensor (Diesel Particulate Filter)	Upstream of diesel particulate filter. See Fig. 264.
TPM (RDK) Wheel Sensor (4)	Inside wheels. See Fig. 9.
Transfer Case Absolute Sensor	On rear of transfer case. See Fig. 18.
Transfer Case Absolute Sensor	On rear of transfer case. See Fig. 56.
TWC (KAT) Temperature Sensor	Right side of transmission.
Vent Window Obstruction Sensor Strip (Left/Right)	Top of respective rear windows.
Wheel Speed Sensors (4)	On respective wheel hub assemblies.
WSS Sensor (Weight Sensing System) (Left/Right Front)	Under respective front corner of front passenger seat.
WSS Sensor (Weight Sensing System) (Left/Right Rear)	Under respective rear corner of front passenger seat.

Mercedes-Benz ML550 2009 - SOLENOIDS & SOLENOID VALVES

Mercedes-Benz ML550 2009 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
Activated Charcoal Canister Shutoff Valve	Right rear wheelwell. See Fig. 254.
AdBlue Metering Valve (Y129)	Front underbody. See Fig. 263.
Air Injection Combination Valve, Left Cylinder Bank (V6)	Left front of engine.
Air Injection Combination Valve, Right Cylinder Bank (V6)	Right front of engine.
AIRmatic Pressure Reduction Valve	Part of AIRmatic compressor unit.
AIRmatic Valve Unit	Behind right side of front bumper. See Fig. 244.
Air Pump Switchover Valve (M113)	Right front of engine. See Fig. 242.
Air Pump Switchover Valve (M156)	On front of engine. See Fig. 243.
Air Pump Switchover Valve (M272)	Front of engine. See Fig. 255.
Automatic Rear-End Door Closing Control Valve	Right side of cargo area. See Fig. 260.
BAS Solenoid Valve	Part of brake booster.
Charge Pressure Positioner	Rear of engine. See Fig. 258.
Front Axle Inlet Solenoid Valve	Inside hydraulic unit.
Front Axle Switchover Solenoid Valve	Inside hydraulic unit.
Fuel Injectors (M642)	Top of engine, above cylinders. See Fig. 257.
Heating System Shutoff Valve	Rear of engine.
Intake Manifold Tumble Flap Switchover Valve	On front of engine.
Left Camshaft Exhaust Solenoid	Left front of engine. See Fig. 247.
Left Camshaft Intake Solenoid	Left front of engine. See Fig. 245.
Left Exhaust Gas Recirculation Positioner	Left rear of engine. See Fig. 240.
Left Front Axle Damping Valve Unit	In left front wheelwell. See Fig. 249.
Left Front Axle Solenoid Valve (Hold)	Inside hydraulic unit.
Left Front Axle Solenoid Valve (Release)	Inside hydraulic unit.
Left Rear Axle Damping Valve Unit	Left rear wheel. See Fig. 251.
Left Rear Axle Solenoid Valve (Hold)	Inside hydraulic unit.
Left Rear Axle Solenoid Valve (Release)	Inside hydraulic unit.
Power Steering Pump Pressure Regulator Valve	Lower left front of engine.
Pressure Regulator Valve	Left front of engine. See Fig. 256.
Purge Control Valve	Left front of engine compartment. See Fig. 253.
Rear Axle Inlet Solenoid Valve	Inside hydraulic unit.
Rear Axle Switchover Solenoid Valve	Inside hydraulic unit.
Right Camshaft Exhaust Solenoid	Right front of engine. See Fig. 248.
Right Camshaft Intake Solenoid	Right front of engine. See Fig. 246.
Right Front Axle Damping Valve Unit	In right front wheelwell. See Fig. 250.
Right Front Axle Solenoid Valve (Hold)	Inside hydraulic unit.
Right Front Axle Solenoid Valve (Release)	Inside hydraulic unit.
Right Rear Axle Damping Valve Unit	At right rear wheel. See Fig. 252.
Right Rear Axle Solenoid Valve (Hold)	Inside hydraulic unit.
Right Rear Axle Solenoid Valve (Release)	Inside hydraulic unit.
SPS (PML) Solenoid Valve	In left front wheelwell.
Three-Disk Thermostat Valve	Front of engine. See Fig. 262.
Variable Intake Manifold Switchover Valve	On front of engine.
Volume Control Valve	Left front of engine. See Fig. 259.

Mercedes-Benz ML550 2009 - SWITCHES

Mercedes-Benz ML550 2009 SWITCHES LOCATION

Component	Location
ATA (EDW) Hood Switch	Left front of engine compartment.
BAS Release Switch	Part of brake booster.
Brake Fluid Indicator Switch	In brake fluid reservoir.
Coolant Level Indicator Switch	Left side of engine compartment.
Driver Seat Belt Buckle & Seat Belt Warning Switch	In driver seat belt buckle.
Front Passenger Seat Belt Buckle & Seat Belt Warning Switch	In right front seat belt buckle.
Oil Level Switch	In engine oil pan.
Parking Brake Indicator Switch	Left front footwell.
Right Front Brake Pad Contact Sensor	On right front brake assembly.
Right Rear Brake Pad Contact Sensor	On right rear brake assembly.
Stoplight Switch	On brake pedal support.
Windshield Washer Fluid Level Indicator Switch	In washer fluid reservoir.

Mercedes-Benz ML550 2009 - MISCELLANEOUS

Mercedes-Benz ML550 2009 MISCELLANEOUS LOCATION

Component	Location
Alarm Signal Horn	Right rear corner of engine compartment.
Auxiliary Battery	Under right front seat. See Fig. 267.
BAS Brake Booster	Near brake master cylinder. See Fig. 2.
Battery	Under right front seat. See Fig. 266.
Central TPM (RDK) Antenna	Under right center of vehicle.
Cockpit Keyless Go Antenna	Under front of center floor console.
Cylinder 1 Ignition Coil (M156)	Top of right cylinder bank. See Fig. 97.
Cylinder 1 Ignition Coil (M272 & M273)	Top of right cylinder bank. See Fig. 95.
Cylinder 2 & 3 Ignition Coils (M272 & M273)	Top of right cylinder bank.
Cylinder 2, 3, & 4 Ignition Coils (M156)	Top of right cylinder bank.
Cylinder 4 Ignition Coil (M272 & M273)	Top of left cylinder bank. See Fig. 96.
Cylinder 5 Ignition Coil (M156)	Top of left cylinder bank. See Fig. 98.
Cylinder 5 & 6 Ignition Coils (M272 & M273)	Top of left cylinder bank.
Cylinder 6, 7, & 8 Ignition Coils (M156)	Top of left cylinder bank.
Data Link Connector (DLC)	Below left side of dash.
Drive Actual Value Potentiometer	Part of front throttle valve actuator.
Driver Airbag Ignition Squib 1	In steering wheel.
Driver Airbag Ignition Squib 2	In steering wheel.
Driver Belt Force Limiter	Base of left "B" pillar.
Driver Buckle ETR Squib	Left side of driver seat.
Driver Side Airbag Squib	In driver seat back.
EGR (ARF) Vacuum Transducer	Rear of engine. See Fig. 241.
E-Net Compensator	Left rear of cargo area. See Fig. 6.
Fanfare Horns & Airbag Clock Spring Contact	Inside steering wheel hub.
Fanfare Horns (Left/Right)	Behind center of front bumper.
FM Rear Window Antenna Amplifier	Left side of tailgate.
Front Passenger Airbag Ignition Squib 1	Behind right side of dash.
Front Passenger Airbag Ignition Squib 2	Behind right side of dash.
Front Passenger Belt Force Limiter	Base of right "B" pillar.
Front Passenger Buckle ETR Squib	Left side of front passenger seat.
Glowtime Output Stage	Top front of engine. See Fig. 86.
GPS Antenna Splitter	Under left seat of 2nd seat row.
Hands-Free System Microphone Group	Part of rearview mirror unit.
Ignition Coils 1, 2, 3 & 4 (V8)	Top right of engine, on cylinder head.
Ignition Coils 5, 6, 7 & 8 (V8)	Top left of engine, on cylinder head.
Interference Filter 1	Center rear of roof.
Interior Keyless Go Antenna	Under left seat of 2nd seat row.
Keyless Go Left Rear Door Antenna	In left rear door.
Keyless Go Right Rear Door Antenna	In right rear door.
Keyless Go Trunk Antenna	Left side of tailgate.
Left Front IR Receiver	In left front door handle.
Left Window Airbag Squib	Behind left side of dash.
Left 2nd Row ETR (GUS) Squib	In left "C" pillar.
Left 2nd Row Side Airbag Ignition Squib	In seat back of left seat of 2nd seat row.
Left 3rd Row ETR (GUS) Squib	On left "D" pillar.
Radio Interference Suppression Capacitor 1	Top right side of engine.
Radio Interference Suppression Capacitor 2	Top left side of engine.
Right Side Airbag Ignition Squib	In front passenger seat back.
Right Window Airbag Squib	Behind right side of dash.
Right 2nd Row ETR (GUS) Squib	In right "C" pillar.
Right 2nd Row Side Airbag Ignition Squib	In seat back of right seat of 2nd seat row.
Right 3rd Row ETR (GUS) Squib	On right "D" pillar.
Roof Antenna Module	Center rear of roof.
TELE AID Spare Antenna	In right "D" pillar.
Throttle Valve Actual Value Potentiometer	Part of front throttle valve actuator.
Transfer Case Switchover Magnet	Front underbody. See Fig. 261.

Mercedes-Benz ML550 2009 - CONNECTORS

Mercedes-Benz ML550 2009 CONNECTORS LOCATION

Component	Location
X8/16	Left rear door. See Fig. 194.
X8/17	Right rear door. See Fig. 195.
X22/6	Right rear of engine compartment. See Fig. 196.
X25/2	Right front footwell. See Fig. 197.
X26	Right front of engine compartment. See Fig. 198.
X26/32	Left front bumper. See Fig. 199.
X35/1	Left front door. See Fig. 200.
X35/2	Right front door. See Fig. 201.
X35/3	Left rear door. See Fig. 202.
X35/4	Right rear door. See Fig. 203.
X55/3	Under left front seat. See Fig. 204.
X55/4	Under right front seat. See Fig. 205.
X55/6	Under right rear seat. See Fig. 206.

Mercedes-Benz ML550 2009 - GROUNDS

Mercedes-Benz ML550 2009 GROUNDS LOCATION

Component	Location
W2	Behind right headlight. See Fig. 207.
W2/1	In right front wheelwell. See Fig. 208.
W6	Behind trim, left rear of cargo area. See Fig. 209.
W6/6	Left rear of cargo area. See Fig. 210.
W7	Behind trim, right rear of cargo area. See Fig. 211.
W7/7	Right rear of cargo area. See Fig. 212.
W8	Behind trim, on right side of tailgate. See Fig. 213.
W8/1	Left side of tailgate. See Fig. 214.
W8/2	Right side of tailgate. See Fig. 215.
W9	Left side of engine compartment. See Fig. 216.
W10	Under front passenger seat. See Fig. 217.
W11 (M156)	Right front of engine. See Fig. 219.
W11 (M642)	Left rear of engine. See Fig. 218.
W11w1	Rear of right cylinder bank. See Fig. 222.
W11w2	Rear of left cylinder bank. See Fig. 223.
W11/1	Left front of engine. See Fig. 220.
W11/4	Attached to generator. See Fig. 221.
W15/1	Under right front footwell. See Fig. 224.
W15/2	Under left front footwell. See Fig. 225.
W16/3	Left rear of engine compartment. See Fig. 226.
W17 (GL Class)	Under right rear seat. See Fig. 227.
W17 (M Class)	Under right rear seat. See Fig. 237.
W17/1 (GL Class)	Under left seat of 2nd seat row. See Fig. 228.
W17/1 (M Class)	Under left rear seat. See Fig. 238.
W17/3	Under right rear seat. See Fig. 229.
W26	Under center console, on SRS mounting bolt. See Fig. 230.
W29/2	At right kick panel. See Fig. 231.
W29/8	Top of left "D" pillar. See Fig. 232.
W29/9	Top of right "D" pillar. See Fig. 233.
W48/3 (GL Class)	Right rear of cargo area. See Fig. 234.
W48/3 (M Class)	Right rear of cargo area. See Fig. 239.
W51/2	Under vehicle, right rear of engine, above steering gear. See Fig. 235.
W70	Left front of engine compartment. See Fig. 236.

Mercedes-Benz ML550 2009 - SPLICES

Mercedes-Benz ML550 2009 SPLICES LOCATION

Component	Location
Z1	Top center of engine. See Fig. 99.
Z2	Top left rear of engine. See Fig. 100.
Z2z1	Top center of engine. See Fig. 101.
Z3/11	Behind center of dash. See Fig. 102.
Z3/51	Under center console. See Fig. 103.
Z5 (M156)	Right side of transmission. See Fig. 187.
Z5 (M272 & M273)	Top right side of engine. See Fig. 104.
Z5 (M642)	Left rear of engine. See Fig. 188.
Z5z2 (M272 & M273)	Top right side of engine. See Fig. 105.
Z6 (M156)	Right rear of engine compartment. See Fig. 189.
Z6 (M642)	Left rear of engine. See Fig. 106.
Z6z1 (M272 & M273)	Right side of engine. See Fig. 107.
Z6z2 (M272 & M273)	Left side of engine. See Fig. 108.
Z6/8	Left front of engine compartment. See Fig. 109.
Z6/12	In left rear door. See Fig. 110.
Z6/13	In right rear door. See Fig. 111.
Z6/14	In center console. See Fig. 112.
Z6/15	In center console. See Fig. 113.
Z6/26 (M272 & M273)	Right side of engine. See Fig. 114.
Z6/27	Right front of engine. See Fig. 115.
Z6/30z1	Front of right cylinder bank. See Fig. 116.
Z6/30z2	Left front of engine. See Fig. 117.
Z6/35	In left front door. See Fig. 118.
Z6/36	In right front door. See Fig. 119.
Z6/47	At left front door sill. See Fig. 120.
Z6/62	At right front footwell. See Fig. 121.
Z7/5	Left rear of engine. See Fig. 122.
Z7/35z1 (M156)	Left rear of engine. See Fig. 190.
Z7/35z1 (M272 & M273)	Top right side of engine. See Fig. 123.
Z7/35z2 (M156)	Right rear of engine compartment. See Fig. 191.
Z7/35z2 (M272 & M273)	Top left side of engine. See Fig. 124.
Z7/35z3	Top left rear of engine. See Fig. 125.
Z7/35z4	Top right rear of engine. See Fig. 126.
Z7/36 (M156)	Right rear of engine. See Fig. 192.
Z7/36 (M272 & M273)	Top right side of engine. See Fig. 127.
Z7/36z1 (M272 & M273)	Top right side of engine. See Fig. 128.
Z7/36z2 (M272 & M273)	Top left side of engine. See Fig. 129.
Z7/38z1 (M272 & M273)	Top right side of engine. See Fig. 130.
Z7/38z2 (M272 & M273)	Top rear of engine. See Fig. 131.
Z7/43 (M272 & M273)	Top right side of engine. See Fig. 132.
Z7/43 (M642)	Left rear of engine. See Fig. 193.
Z7/43z1	Top rear of engine. See Fig. 133.
Z7/44 (M272 & M273)	Top rear of engine. See Fig. 134.
Z7/61	Right rear of engine compartment. See Fig. 135.
Z7/88	Under right seat of 2nd seat row. See Fig. 136.
Z7/98z1	Rear of right cylinder bank. See Fig. 137.
Z7/98z2	Left rear of engine. See Fig. 138.
Z7/98z3	Right rear of engine compartment. See Fig. 139.
Z9	Right front of engine. See Fig. 140.
Z21	Under right rear footwell. See Fig. 141.
Z28/44	At left rear door sill. See Fig. 142.
Z35/7	Behind center of dash. See Fig. 143.
Z35/8	Behind center of dash. See Fig. 144.
Z36/1	Behind left side of rear bumper. See Fig. 145.
Z36/2	Behind left side of rear bumper. See Fig. 146.
Z36/3	Behind center of front bumper. See Fig. 147.
Z36/4	Behind center of front bumper. See Fig. 148.
Z36/12	Right rear of engine compartment. See Fig. 149.
Z36/14	Right rear of engine compartment. See Fig. 149.
Z37/69	Right rear of engine compartment. See Fig. 149.
Z37/70	Right rear of engine compartment. See Fig. 149.
Z43	Top left of tailgate. See Fig. 150.
Z50/3	Behind center of dash. See Fig. 151.
Z50/4	Behind right side of dash. See Fig. 152.
Z50/5	Inside wiring harness under center console. See Fig. 141.
Z50/36	Behind center of dash. See Fig. 153.
Z51/6	In right front footwell. See Fig. 154.
Z53/20	Under rear of center console. See Fig. 155.
Z53/25	Under left rear seat. See Fig. 156.
Z53/26	In right rear footwell. See Fig. 141.
Z54/7	Under rear of center console. See Fig. 157.
Z55/1	Right side of tailgate. See Fig. 158.
Z55/4	Right side of tailgate. See Fig. 159.
Z57/15	Right front of engine compartment. See Fig. 160.
Z60/4	Behind left side of front bumper. See Fig. 161.
Z61/4	Under center console. See Fig. 162.
Z61/5	Under center console. See Fig. 163.
Z61/10	In driver seat back. See Fig. 164.
Z61/11	In driver seat back. See Fig. 165.
Z61/12	Under left seat of 2nd seat row. See Fig. 166.
Z61/13	Under right seat of 2nd seat row. See Fig. 167.
Z61/14	In right rear doorsill. See Fig. 168.
Z61/15	In right rear doorsill. See Fig. 169.
Z68/1	Behind center of dash. See Fig. 170.
Z68/2	Behind center of dash. See Fig. 171.
Z68/5	Behind center of dash. See Fig. 172.
Z68/6	Behind center of dash. See Fig. 173.
Z68/7	Behind center of dash. See Fig. 174.
Z81/8	Under center console. See Fig. 175.
Z84/1	Front of engine. See Fig. 176.
Z84/2	Front of engine. See Fig. 177.
Z100/2	Near left "B" pillar. See Fig. 142.
Z101/1	Under right seat of 2nd seat row. See Fig. 178.
Z101/2	Under right seat of 2nd seat row. See Fig. 179.
Z204/1	Left rear of cargo area. See Fig. 180.
Z204/2	Right rear of cargo area. See Fig. 181.
Z204/3	Under right rear seat. See Fig. 182.
Z204/4	In right front footwell. See Fig. 183.
Z204/5	In left front footwell. See Fig. 184.
Z204/6	Under left rear seat. See Fig. 185.
Z204/7	In left front footwell. See Fig. 186.