1997 MERCEDES-BENZ ML320 engine

2001 MERCEDES-BENZ
ML320 & ML430
BUZZERS, RELAYS & TIMERS
BUZZERS, RELAYS & TIMERS LOCATION
ComponentComponent Location
Alarm Horn RelayIn left side of engine compartment, in fuse & relay
box.
Blower Motor RelayIn left side of engine compartment, in fuse & relay
box.
Central Locking (All Doors Lock Relay)In left side of engine compartment, in fuse & relay
box.
Central Locking (Left Front Door & Fuel Filler Flap
Unlock Relay)In left side of engine compartment, in fuse & relay
box.
Central Locking (Right Front Door & Rear Doors
Unlock Relay)In left side of engine compartment, in fuse & relay
box.
Central Locking (Tailgate Unlock Relay)In left side of engine compartment, in fuse & relay
box.
Circuit 15 RelayIn left side of engine compartment, in fuse & relay
box.
Circuit 15 RelayIn right front footwell fuse & relay box.
Circuit 15 Delayed RelayIn left side of engine compartment, in fuse & relay
box.
Circuit 58 RelayIn left side of engine compartment, in fuse & relay
box.
Circuit 58L Relay (W/ DRL)In left side of engine compartment, in fuse & relay
box.
Circuit 58R Relay (W/ DRL)In left side of engine compartment, in fuse & relay
box.
Circulation Pump RelayIn left side of engine compartment, in fuse & relay
box.
Convenience RelayIn left side of engine compartment, in fuse & relay
box.
Differential Lock Vacuum Pump RelayIn left side of engine compartment, in fuse & relay
box.
Engine Cooling Fan Stage 1 RelayIn left side of engine compartment, in fuse & relay
box.
ESP Stoplight Suppression RelayIn left side of engine compartment, in fuse & relay
box.
Front Foglight RelayIn left side of engine compartment, in fuse & relay
box.
Front Wiper Motor RelayIn left side of engine compartment, in fuse & relay

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
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Saturday, October 02, 2010 3:21:17 PMPage 1 © 2006 Mitchell Repair Information Company, LLC.
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Saturday, October 02, 2010 3:21:20 PMPage 1 © 2006 Mitchell Repair Information Company, LLC.

CIRCUIT PROTECTION DEVICES
CIRCUIT PROTECTION DEVICES LOCATION
box.
Fuel Pump RelayIn left side of engine compartment, in fuse & relay
box.
Headlamp Cleaning System RelayIn right front footwell fuse & relay box.
Heated Rear Window RelayIn right front footwell fuse & relay box.
Heater RelayAt right kick panel.
Heater Relay (Stage 1)At right kick panel.
Heater Relay (Stage 2)At right kick panel.
High Pressure/Return Pump RelayIn left side of engine compartment, in fuse & relay
box.
Left Front Power Window RelayIn left side of engine compartment, in fuse & relay
box.
Left Turn Signal RelayIn left side of engine compartment, in fuse & relay
box.
Low Beam Headlamp Relay (W/ DRL)In left side of engine compartment, in fuse & relay
box.
Rear Foglight RelayIn left side of engine compartment, in fuse & relay
box.
Rear Wall Door Washer Pump RelayIn left side of engine compartment, in fuse & relay
box.
Rear Window Defroster RelayIn right front footwell fuse & relay box.
Right Front Power Window RelayIn left side of engine compartment, in fuse & relay
box.
Right Turn Signal RelayIn left side of engine compartment, in fuse & relay
box.
Seat Comfort RelayIn right front footwell fuse & relay box.
Seat Heater Relay (Stage 1)On underside of left/right front seat.
Seat Heater Relay (Stage 2)On underside of left/right front seat.
Secondary Air Injection Pump RelayIn left side of engine compartment, in fuse & relay
box.
Starter RelayIn left side of engine compartment, in fuse & relay
box.
Two-Tone Horn RelayIn left side of engine compartment, in fuse & relay
box.
ComponentComponent Location
E-BoxIn left side of engine compartment.
Fuse & Relay BoxIn left side of engine compartment, in E-box. See
Fig. 1
.
Right Front Footwell Fuse & Relay BoxBelow right side of dash, behind kick panel. See

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
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Saturday, October 02, 2010 3:21:17 PMPage 2 © 2006 Mitchell Repair Information Company, LLC.

CONTROL UNITS
CONTROL UNITS LOCATION
MOTORS
MOTORS LOCATION
Fig. 1 .
ComponentComponent Location
Acoustimass Bass ModuleUnder driver's seat. See Fig. 1 .
All Activity Module (AAM)In left side of engine compartment, in E-box. See
Fig. 1
.
ASR/ETS/ESP Hydraulic UnitIn left side of engine compartment, below washer
bottle.
Electronic Selector Lever Control ModuleUnder center console, at base of selector lever
assembly.
Engine Control Module (ME-SFI)In left side of engine compartment, in E-box. See
Fig. 1
.
ESA Control Module (Right/Left)Under respective front seat.
ESP/SPS/BAS Control ModuleIn left side of engine compartment, in E-box. See
Fig. 1
.
ETC Control ModuleBehind center of dash. See Fig. 1 .
Extended Activity Module (EAM)Behind left side of dash.
Global Positioning System (GPS) Control ModuleBehind center of dash.
MB-Immobilizer Control ModuleIn top right side of steering column. See Fig. 1 .
Restraint System Control ModuleUnder center console.
SRS Control ModuleBelow front of center console. See Fig. 1 .
Suction Cooling Fan Control ModuleAt front of engine compartment.
Trailer Turn Signal Control ModuleIntegral to trailer harness.
Transfer Case Control ModuleBelow center console, behind shift assembly. See
Fig. 1
.
Trip Computer Control ModuleIn front of roof.
Xenon Headlamp Control Module (Left/Right)Behind respective headlamp.
Xenon Headlamp Ignition Module (Left/Right)Behind respective headlamp.
ComponentComponent Location
Blend Air Flap Actuator MotorBehind right side of dash.
Blower MotorUnder right side of dash.
Coolant Circulation PumpIn right rear of engine compartment.
Differential Lock Vacuum PumpOn left side of engine compartment.
Electric Air PumpOn front center of engine.
Filler Flap CL Actuating MotorIn left rear cargo area, behind trim.

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
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Saturday, October 02, 2010 3:21:17 PMPage 3 © 2006 Mitchell Repair Information Company, LLC.

SENDING UNITS & SENSORS
SENDING UNITS & SENSORS LOCATION
Fuel PumpIn top of fuel tank.
Headlamp Range Adjustment Motor (Right/Left)Behind respective headlamp.
Headlamp Washer PumpIn left front of engine compartment, on side of
washer fluid reservoir.
In-Car Temperature Sensor Aspirator BlowerBehind center of dash.
Lamella Sun Roof Motor (Left/Right)At rear of roof.
Module Box Blower MotorIn left side of engine compartment, in E-box.
Rear Wall Door Washer PumpIn left side of engine compartment, on side of
washer fluid reservoir.
Tailgate Window Wiper MotorIn liftgate, behind trim.
Transfer Case Range Selection MotorOn left rear of transfer case.
Windshield Washer PumpIn left front of engine compartment, on washer fluid
reservoir.
Wiper MotorAt left rear of engine compartment, under plenum
cover.
ComponentComponent Location
ABS Lateral Acceleration SensorBelow center console, behind shift assembly.
Camshaft Hall Effect SensorOn right front of engine.
Crankshaft Position (CKP) SensorOn left rear of engine.
ECT SensorOn front center of engine.
ESP Brake Pressure Sensor No. 1In left rear of engine compartment.
ESP Brake Pressure Sensor No. 2In left rear of engine compartment.
Freeze Protection Temperature SensorBehind right side of dash, in evaporator.
Front Axle SensorBehind right front wheel.
Fuel Level SensorOn top of fuel tank.
Fuel Tank Emissions Monitoring Pressure SensorIn left rear side of cargo area, behind trim on fuel
filler pipe.
Hot Film MAF SensorIn right side of engine compartment.
In-Car Temperature SensorBehind center of dash.
Knock Sensor No. 1 (KS 1)On right side of engine, below intake manifold.
Knock Sensor No. 2 (KS 2)On left side of engine, below intake manifold.
Left Front Brake Pad Wear SensorBehind left front wheel.
Left Front VSSBehind left front wheel.
Left Rear Brake Pad Wear SensorBehind left rear wheel.
Left Rear VSSBehind left rear wheel.
Membrane Travel SensorIntegral to brake booster.
Oil SensorOn lower right front of engine.
Outside Temperature Indicator Temperature SensorBehind left side of front grille.

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
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Saturday, October 02, 2010 3:21:17 PMPage 4 © 2006 Mitchell Repair Information Company, LLC.

SOLENOIDS & SOLENOID VALVES
SOLENOIDS & SOLENOID VALVES LOCATION
SWITCHES
SWITCHES LOCATION
Outside Temperature Sensor (A/C)Behind lower right side of dash.
Oxygen Sensor (O2S 1) (Left) (Before TWC)Under left side of vehicle, in left exhaust downpipe.
Oxygen Sensor (O2S 2) (Left) (After TWC)Under left side of vehicle, in left exhaust pipe.
Oxygen Sensor (O2S 1) (Right) (Before TWC)Under right side of vehicle, in right exhaust
downpipe.
Oxygen Sensor (O2S 2) (Right) (After TWC)Under right side of vehicle, in right exhaust pipe.
Pedal Value SensorIn left rear corner of engine compartment.
Pressure SensorOn right front of engine.
Rain SensorAt front of headliner.
Rear Axle SensorBehind right rear wheel.
Refrigerant Pressure SensorIn left front of engine compartment.
Right Front Brake Pad Wear SensorBehind right front wheel.
Right Front VSSBehind right front wheel.
Right Rear Brake Pad Wear SensorBehind right rear wheel.
Right Rear VSSBehind right rear wheel.
Steering Angle SensorBelow driver's side of dash.
Yaw Rate SensorBelow center console, behind shift assembly.
ComponentComponent Location
Activated Charcoal Canister Shutoff ValveUnder rear of vehicle, above spare wheel.
Adjustable Camshaft Timing SolenoidAt front center of engine.
AIR Pump Switchover ValveOn right front of engine.
EGR Switchover ValveOn top rear of engine.
Purge Control ValveIn left rear corner of engine compartment.
Shifting Induction Pipe Switchover ValveOn top front center of engine.
Solenoid Valve (BAS)Integral to brake booster.
Throttle Valve Control ElementOn center rear of engine.
Valve Unit (ETC)In transmission.
ComponentComponent Location
Brake Fluid Level SwitchIn brake fluid reservoir.
Electronic ECL SwitchIn left rear of engine compartment.
Engine Hood Switch (ATA)In left rear corner of engine compartment.
Kickdown SwitchBelow accelerator pedal.
Left Front Seat Belt Buckle SwitchIn driver's seat belt buckle.

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
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Saturday, October 02, 2010 3:21:17 PMPage 5 © 2006 Mitchell Repair Information Company, LLC.

MISCELLANEOUS
MISCELLANEOUS LOCATION
CONNECTORS
CONNECTORS LOCATION
Parking Brake SwitchOn parking brake support bracket.
Passenger's Seat Belt SwitchIn passenger's seat belt buckle.
Release Switch (BAS)Integral to brake booster.
Right Front Seat Belt Buckle SwitchIn passenger's seat belt buckle.
Rotary Tumbler Trunk Lid MicroswitchPart of tailgate latch assembly.
Stoplight SwitchOn brake pedal support.
ComponentComponent Location
Alarm HornIn left rear corner of engine compartment.
Alarm Siren W/ Auxiliary BatteryIn left rear corner of engine compartment.
Antenna Coil (Left)At left side of rear window, behind trim.
Antenna Coil (Right)At right side of rear window, behind trim.
Antenna SplitterOn right side of liftgate.
Audio AmplifierBehind left side of dash.
Blower Motor Preresistor GroupUnder right side of dash, in blower assembly.
Data Link Connector (DLC)Below left side of dash.
Diagnostic Module (OBD II) Scan Tool ConnectorBelow left side of dash.
Driver's ETR SquibOn base of left "B" pillar, behind trim.
FM/AM AmplifierIn liftgate, behind trim.
Front Passenger ETR SquibOn base of right "B" pillar, behind trim.
Garage Door TransmitterOn front center of roof.
Hands-Free MicrophoneOn front center of roof.
Low Beam Headlight Relay Shorting ClipIn left side of engine compartment, in fuse & relay
box.
Recirculated Air Flap ElementBehind right side of dash.
Transponder CoilTop right side of steering column, on ignition
switch.
ComponentComponent Location
X2/4 (Black, 2-Pin)Behind radio.
X11/4 (Black, 16-Pin)Below left side of dash.
X18 (Red, 28-Pin)Behind center of dash.
X18/1 (Black, 9-Pin)Under tailgate trim.
X18/A_B (Black, 16-Pin)At right kick panel.
X18/2 (1) (White, 10-Pin)At left rear of engine compartment.
X18/2 (2) (4-Pin)At left rear of engine compartment, in E-box.

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
me
Saturday, October 02, 2010 3:21:17 PMPage 6 © 2006 Mitchell Repair Information Company, LLC.

X18/2 (3) (Black, 6-Pin)At left rear of engine compartment.
X18/3 (Black, 10-Pin)Behind left rear wheel.
X18/5 (Black, 3-Pin)Under trim, at left rear of cargo area.
X18/6 (Black, 3-Pin)At left rear of cargo area.
X18/7 (Black, 9-Pin)At left side of engine compartment.
X18/10 (3-Pin)At left rear of engine compartment, in E-box.
X18/11 (Black, 2-Pin)Behind left headlight.
X18/18 (3-Pin)Behind radio.
X18/23 (Black, 3-Pin)At left side of engine compartment, in E-box.
X18/26 (Black, 14-Pin)At left rear of engine compartment, in E-box.
X18/27 (Black, 8-Pin)At left side of engine compartment, in E-box.
X18/28 (Black, 8-Pin)At left side of engine compartment, in E-box.
X18/28 (2) (Natural, 14-Pin)At left rear of engine compartment, in E-box.
X18/31 (Black, 24-Pin)At left side of engine compartment, in E-box.
X18/33 (Black, 3-Pin)At left side of engine compartment, in E-box.
X22 (Black, 14-Pin)At left side of engine compartment, in E-box.
X28/3 (Black, 2-Pin)Under right front seat.
X35/1 (Black, 20-Pin)In left front door jamb.
X35/2 (Black, 20-Pin)In right front door jamb.
X35/3 (Black, 20 PinIn left rear door jamb.
X35/4 (Black, 20-Pin)In right rear door jamb.
X35/27 (Black, 3-Pin)Behind center of dash.
X35/28 (Black, 6-Pin)Behind rear bumper.
X39 (1) (Clear, 10-Pin)Behind radio.
X39 (2) (10-Pin)Under center console.
X39/15x1 (2-Pin)At rear of center console.
X39/15x2 (2-Pin)At rear of center console.
X39/37 (2-Pin)Under front passenger seat.
X52 (16-Pin)Under trim, at left rear of cargo area.
X54/1 (Red, 2-Pin)Under left front seat.
X54/9 (White, 2-Pin)Under right front seat.
X54/10 (Green, 2-Pin)Under left front seat.
X54/20 (Black, 2-Pin)At rear of left front seat.
X55/3 (Black, 16-Pin)Under left front seat.
X55/4 (Black, 16-Pin)Under right front seat.
X58 (13-Pin)On rear bumper.
X58/1 (White, 2-Pin)At lower right side of dash.
X58/3 (Green, 2-Pin)Behind radio.
X58/4 (White, 2-Pin)At right rear of cargo area.
X64/7 (Black, 2-Pin)Behind right headlight.
X64/10 (1) (Black, 6-Pin)Below rear of center console.

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
me
Saturday, October 02, 2010 3:21:17 PMPage 7 © 2006 Mitchell Repair Information Company, LLC.

GROUNDS
GROUNDS LOCATION
SPLICES
SPLICES LOCATION
Below rear of center console.
X85/8 (2-Pin)Behind right side of dash.
X85/9 (2-Pin)At left rear of engine compartment, in E-box.
X88/17 (Black, 2-Pin)At left side of engine compartment, in E-box.
ComponentComponent Location
W2Behind right headlight. See Fig. 1 .
W2/1Behind right headlight. See Fig. 1 .
W6Behind trim at left rear of cargo area. See Fig. 1 .
W7Behind trim at right rear of cargo area. See Fig. 1 .
W8Behind trim on tailgate. See Fig. 1 .
W9Behind right headlight.
W11/3At top center front of engine. See Fig. 1 .
W16At left rear of engine compartment. See Fig. 1 .
W16/4At right rear of engine compartment. See Fig. 1 .
W16/6At right rear of engine compartment. See Fig. 1 .
W18Under left front seat, under carpet. See Fig. 1 .
W19Under right front seat, under carpet. See Fig. 1 .
W26Under center console, on SRS mounting bolt. See
Fig. 1
.
W29/2At right kick panel.
ComponentComponent Location
Z01In telephone harness.
Z02In telephone harness.
Z3/29In motor harness, at left rear of engine
compartment.
Z3/29aIn motor harness, under plastic harness channel.
Z3/29bIn motor harness, in E-box.
Z6/8In motor harness.
Z7/35In motor harness, under plastic harness channel.
Z7/36In motor harness, under plastic harness channel.
Z28/5In right front door harness.
Z28/6In left front door harness.
Z28/25In passenger harness, near breakout to left rear door.
Z28/26In passenger harness, near breakout to left rear door.

2001 Mercedes-Benz ML320
2001 MERCEDES-BENZ ML320 & ML430
me
Saturday, October 02, 2010 3:21:17 PMPage 8 © 2006 Mitchell Repair Information Company, LLC.