AIR CONDITIONING – Mercedes-Benz ML550 2009 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram, with Thermotronic (1 of 3) for Mercedes-Benz ML550 2009

List of elements for Automatic A/C Wiring Diagram, with Thermotronic (1 of 3) for Mercedes-Benz ML550 2009:

• (+)
• (at right kick panel) w29/2
• (left side of engine compt) w9
• (not used)
• A/c compressor (gl-class: lower left front of engine)
• A/c recirculation unit
• Anst
• Battery compartment prefuse box (under right front seat)
• Blower motor
• Blower regulator
• Booster blower electronic blower controller (on booster blower motor)
• Booster blower motor (under rear of center console)
• C10a
• C12a
• C78
• C91
• Can-b h
• Can-b l
• Center rear interior temperature sensor (under right rear of center floor console)
• Cockpit fuse box (behind right end of dash)
• Comfort aac pushbutton control module
• Computer data lines system
• Coolant circulation pump (in left front wheelwell)
• Dew point sensor (gl-class: under right side of dash) (ml-class: under right side of dash, near blower motor)
• Diag
• Fresh air & air recirculation flap actuator motor (ml-class: on hvac unit) (gl-class: right side of fresh air housing)
• Fuse 10a
• Fuse 15a
• Fuse 40a
• Gnd
• Hot at all times
• Krv
• Lin
• Nca
• Pnk
• Red
• Reserve fuse
• Sig
• W/ rear window defroster
• W29/2 (at right kick panel)
• Wake up
• Zwp

Automatic A/C Wiring Diagram, with Thermotronic (2 of 3) for Mercedes-Benz ML550 2009

List of elements for Automatic A/C Wiring Diagram, with Thermotronic (2 of 3) for Mercedes-Benz ML550 2009:

• (not used)
• Front prefuse (right rear of engine compt)
• Fuse 100a
• Hot at all times
• Left blending air flap actuator (ml-class: on hvac unit) (gl-class: left side of a/c unit)
• Left center air flap actuator motor (ml-class: on hvac unit) (gl-class: left side of a/c unit)
• Left center outlet temperature sensor (behind center of dash)
• Left defroster vent flap actuator motor (ml-class: on hvac unit) (gl-class: left side of fresh air housing)
• Left footwell flap actuator motor (ml-class: on hvac unit) (gl-class: left side of a/c unit)
• Left footwell temperature sensor (ml-class: under left center of dash) (gl-class: left side of hvac unit)
• Left side outlet temperature sensor (under left side of dash)
• Nca
• Pnk
• Ptc heater booster (if equipped)
• Rear air distribution flap actuator motor (ml-class: on hvac unit) (gl-class: on booster blower assembly)
• Red
• Right blending air flap actuator (ml-class: on hvac unit) (gl-class: right side of a/c unit)
• Right center air flap actuator motor (ml-class: on hvac unit) (gl-class: on booster blower assembly)
• Right center outlet temperature sensor (behind center of dash)
• Right defroster vent flap actuator motor (ml-class: on hvac unit) (gl-class: right side of fresh air housing)
• Right footwell flap actuator motor (ml-class: on hvac unit) (gl-class: right side of fresh air housing)
• Right side outlet temperature sensor (under right side of dash)
• Used) (not
• W52/7

Automatic A/C Wiring Diagram, with Thermotronic (3 of 3) for Mercedes-Benz ML550 2009

List of elements for Automatic A/C Wiring Diagram, with Thermotronic (3 of 3) for Mercedes-Benz ML550 2009:

• (-) (or kts-s)
• (behind left side of front bumper) ambient temperature display temperature sensor
• (behind radiator) electric suction fan engine & a/c w/ integrated control
• (in right front wheelwell) w2/1
• (in right rear wheelwell) activated charcoal filter shutoff valve
• (or akf)
• (or lues)
• (or pnk)
• (top of left "c" pillar) (if equipped) rear headroom ac temperature sensor
• 3.5l, 5.5l & 4.6l
• 3.5l, ml-class 3.0l
• 5.5l & 4.6l
• 5.5l, 3.5l & 4.6l
• 87d2
• Can-c h
• Can-c l
• Cdi control module (3.0l) me-sfi (me) control module (except 3.0l) (gl-class 3.0l: right rear of engine compt) (gl-class except 3.0l: center rear of engine) (ml-class except 3.0l: top center of engine)
• Circuit 31 left wheelhouse luggage compartment voltage distributor connector
• Computer data lines system
• Coolant temperature sensor (3.0l: top left side of engine) (ml-class except 3.0l: left rear of engine) (gl-class except 3.0l: rear of left cylinder bank)
• Dual sun sensor (top center of dash)
• Emissions sensor (right rear corner of engine compt)
• Engine compartment fuse & relay box (right side of engine compt)
• Evaporator temperature sensor (under center of dash)
• Fuse 15a
• Fuse 25a
• Ger
• Gl-class 3.0l
• Gl-class except 3.0l
• Hot at all times
• Hot w/ engine circuit 87 relay energized
• Load compartment fuse & relay box (right rear of cargo area)
• Ml-class 3.0l
• Mr1
• Ms2
• Nca
• Pnk
• Rear air conditioning blower motor (gl-class: on rear a/c unit) (ml-class: left side of cargo area)
• Rear air conditioning blower regulator (if equipped) (on rear blower motor)
• Rear air conditioning coolant shutoff motor (if equipped)
• Rear air conditioning evaporator temperature sensor (if equipped) (gl-class: left side of cargo area) (ml-class: on rear hvac unit)
• Red
• Refrigerant pressure sensor (in left front wheelwell)
• Right footwell temperature sensor (ml-class: under right center of dash) (gl-class: right side of hvac unit)
• Tmot
• W6 (gl-class: at left "d" pillar) (ml-class: behind trim, at left rear of cargo area)

Automatic A/C Wiring Diagram, without Thermotronic (1 of 2) for Mercedes-Benz ML550 2009

List of elements for Automatic A/C Wiring Diagram, without Thermotronic (1 of 2) for Mercedes-Benz ML550 2009:

• (at right kick panel) w29/2
• (gl-class: lower left front of engine) a/c compressor
• (ml-class: under right center of dash) (gl-class: right side of hvac unit) right footwell temperature sensor
• A/c recirculation unit
• Aac pushbutton control module
• Ambient temperature display temperature sensor (behind left side of front bumper)
• Batt
• Battery compartment prefuse box (under right front seat)
• Blower motor
• Blower regulator
• C12a
• C78
• C91
• Can-b h
• Can-b l
• Cockpit fuse box (behind right end of dash)
• Computer data lines system
• Coolant circulation pump (in left front wheelwell)
• Evaporator temperature sensor (under center of dash)
• Fresh air & air recirculation flap actuator motor (ml-class: on hvac unit) (gl-class: right side of fresh air housing)
• Fuse 15a
• Fuse 40a
• Gnd
• Hot at all times
• Krv
• Left defroster vent flap actuator motor (ml-class: on hvac unit) (gl-class: left side of fresh air housing)
• Lin
• Nca
• Pnk
• Red
• Refrigerant pressure sensor (in left front wheelwell)
• Reserve fuse
• Right blending air flap actuator (ml-class: on hvac unit) (gl-class: right side of a/c unit)
• Sig
• W29/2 (at right kick panel)
• W9 (left side of engine compt)
• Wake up
• Zwp

Automatic A/C Wiring Diagram, without Thermotronic (2 of 2) for Mercedes-Benz ML550 2009

List of elements for Automatic A/C Wiring Diagram, without Thermotronic (2 of 2) for Mercedes-Benz ML550 2009:

• (-) (or kts-s)
• (at right kick panel) w29/2
• (not used)
• (or akf)
• (or lues)
• (or pnk)
• 5.5l, 3.5l & 4.6l
• 87d2
• Activated charcoal filter shutoff valve (in right rear wheelwell)
• Can-c h
• Can-c l
• Cdi control module (3.0l) me-sfi (me) control unit (except 3.0l) (gl-class except 3.0l: center rear of engine) (ml-class except 3.0l: top center of engine) (gl-class 3.0l: right rear of engine compt)
• Center rear interior temperature sensor (under right rear of center floor console)
• Computer data lines system
• Coolant temperature sensor (3.0l: top left side of engine) (ml-class except 3.0l: left rear of engine) (gl-class except 3.0l: rear of left cylinder bank)
• Electric suction fan engine & a/c w/ integrated control (behind radiator)
• Engine compt fuse & relay box (right side of engine compt)
• Front prefuse (right rear of engine compt)
• Fuse 100a
• Fuse 15a
• Ger
• Gl-class 3.0l
• Gl-class except 3.0l
• Hot at all times
• Hot w/ engine circuit 87 relay energized
• Left blending air flap actuator (ml-class: on hvac unit) (gl-class: left side of a/c unit)
• Left center air flap actuator motor (ml-class: on hvac unit) (gl-class: left side of a/c unit)
• Left center outlet temperature sensor (behind center of dash)
• Left footwell flap actuator motor (ml-class: on hvac unit) (gl-class: left side of a/c unit)
• Left footwell temperature sensor (ml-class: under left center of dash) (gl-class: left side of hvac unit)
• Left side outlet temperature sensor (under left side of dash)
• Ml-class 3.0l
• Mr1
• Nca
• Pnk
• Ptc heater booster (if equipped)
• Rear air distribution flap actuator motor (ml-class: on hvac unit) (gl-class: on booster blower assembly)
• Red
• Right center outlet temperature sensor (behind center of dash)
• Right side outlet temperature sensor (under right side of dash)
• Sun sensor (top center of dash)
• Tmot
• W2/1 (in right front wheelwell)
• W52/7