AIR CONDITIONING – Mercedes-Benz ML550 2012 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram, with Thermotronic (1 of 4) for Mercedes-Benz ML550 2012

List of elements for Automatic A/C Wiring Diagram, with Thermotronic (1 of 4) for Mercedes-Benz ML550 2012:

• (-)
• (under center console) w1/4
• 30g
• Air recirculation mode button
• Automatic air conditioning control & operating unit
• Battery compartment prefuse box (under right front seat)
• Booster blower electronic blower controller (on blower motor)
• C13a
• C19a
• Can b h
• Can b l
• Cbr bg
• Cockpit fuse box
• Computer data lines system
• Coolant circulation pump (in left front wheelwell)
• Defogger system
• Fresh air & air recirculation flap actuator motor (on hvac unit)
• Fuse 10a
• Fuse 150a
• Fuse 15a
• Fuse 25a
• Fuse 40a
• Gnd
• High side
• Hot at all times
• Info not available
• Interior prefuse box
• Kmv sk (+)
• Kmv sk (-)
• Komp pwr
• Komp rv(-)
• Lin
• Lin b8 (+)
• Lin b8 data
• Lin b8 gnd
• Lin b8 rf
• Lin data
• Nca
• Rear air conditioning electronic blower controller (if equipped)
• Rear blower motor
• Red
• S14
• S22
• Sig
• Sig li
• Sig re
• Temp ka sig
• Temp v sig
• Vdf
• Vent v
• W1/4 (under center console)
• W6 (left "d" pillar)
• W9 (left side of engine compt)
• Wake up
• X122/2-c2
• X122/3-c1
• X18-c1
• X25/2-c1
• X26/4-c1

Automatic A/C Wiring Diagram, with Thermotronic (2 of 4) for Mercedes-Benz ML550 2012

List of elements for Automatic A/C Wiring Diagram, with Thermotronic (2 of 4) for Mercedes-Benz ML550 2012:

• (behind center of dash) right side air outlet temperature sensor
• (under center of dash) evaporator temperature sensor
• (under left side of dash) left side air outlet temperature sensor
• Left blending air flap actuator (on hvac unit)
• Left defroster vent flap actuator motor (on hvac unit)
• Left footwell air outlet temperature sensor
• Left footwell flap actuator motor (on hvac unit)
• Rear actuator motor blend air flap w/ cut off function
• Rear air duct air outlet temperature sensor
• Red
• Right blending air flap actuator (on hvac unit)
• Right defroster vent flap actuator motor (on hvac unit)
• Right footwell air outlet temperature sensor
• Right footwell flap actuator motor (on hvac unit)
• X122/2-c1

Automatic A/C Wiring Diagram, with Thermotronic (3 of 4) for Mercedes-Benz ML550 2012

List of elements for Automatic A/C Wiring Diagram, with Thermotronic (3 of 4) for Mercedes-Benz ML550 2012:

• (on hvac unit) rear air distribution flap actuator motor
• 3.0l turbo diesel
• Air quality sensor
• Computer data lines system
• Except 3.0l turbo diesel
• Gnd
• Interior temperature sensor w/ integrated fan
• Left b-pillar air distribution actuator motor
• Left center air outlet flap actuator motor (on hvac unit)
• Lin b13
• Nca
• Overhead control panel control unit
• Ptc heater booster (if equipped)
• Rear air conditioning evaporator shutoff valve (if equipped)
• Rear air conditioning evaporator temperature sensor (if equipped) (on rear hvac unit)
• Rear air conditioning head area temperature sensor (if equipped)
• Red
• Refrigerant compressor
• Right b-pillar air distribution actuator motor
• Right center air outlet flap actuator motor (on hvac unit)
• Sun sensor (top center of dash)
• Vehicle interior humidity & temperature sensor
• W15/9 (under center console)
• X122/2-c1
• X122/3-c2
• X18-c1
• X22/2-c2
• X26-c1

Automatic A/C Wiring Diagram, with Thermotronic (4 of 4) for Mercedes-Benz ML550 2012

List of elements for Automatic A/C Wiring Diagram, with Thermotronic (4 of 4) for Mercedes-Benz ML550 2012:

• (-)
• (or tmot1)
• (right front fender) (3.0l turbo diesel) cdi control module (top center of engine) (except 3.0l turbo diesel) me-sfi control unit
• 25/2-c1
• 3.0l turbo diesel
• 3.5l
• 4.6l twin turbo
• Aav
• Ac housing
• Activated charcoal filter shutoff valve (left front wheelwell)
• Blower motor (under right side of dash)
• Blower regulator
• Can-e1 h
• Can-e1 l
• Charge air cooler circulation pump (4.6l twin turbo)
• Computer data lines system
• Coolant temperature sensor
• Engine compartment fuse/relay box (right side of engine compt)
• Engine compartment prefuse box
• Engine controls system
• Except 3.0l turbo diesel
• Fan motor
• Fuse 10a
• Fuse 125a
• Fuse 15a
• Fuse 20a
• Hav
• Heating system shutoff valve (4.6l twin turbo) (rear of engine)
• Hot at all times
• Hot w/ circuit 87m relay energized
• Hot w/ turbo charger relay energized
• Left center air outlet symbol illumination (if equipped)
• Left front side air outlet symbol illumination (if equipped)
• Lues
• Mr1
• Nca
• Outside temperature sensor
• Pwm
• Red
• Refrigerant pressure sensor (in left front wheelwell)
• Right center air outlet symbol illumination (if equipped)
• Right front side air outlet symbol illumination (if equipped)
• Sam control unit
• Tmot
• Uhi
• W1/4 (under center console)
• W2 (behind right headlight)
• W2/1 (in right front wheelwell)
• W52/11 (right rear of engine compt)
• W9 (left side of engine compt)
• Wiper park heater
• Wiper park position heater relay
• X26/31-c1
• X26/32

Automatic A/C Wiring Diagram, without Thermotronic (1 of 2) for Mercedes-Benz ML550 2012

List of elements for Automatic A/C Wiring Diagram, without Thermotronic (1 of 2) for Mercedes-Benz ML550 2012:

• (-)
• (5 to 7 pins not used)
• (9 & 10 pins not used)
• (left side of engine compt) w9
• (under center console) w1/4
• 3.0l turbo diesel
• 3.5l & 4.6l twin turbo
• 30g
• A/c housing
• Air recirculation mode button
• Automatic air conditioning control and operating unit
• Blower motor (under right side of dash)
• Blower regulator
• C19a
• Can-b h
• Can-b l
• Cockpit fuse box
• Computer data lines system
• Coolant circulation pump (in left front wheelwell)
• Defogger system
• Engine compt fuse & relay box (right side of engine compt)
• Evaporator temperature sensor (under center of dash)
• Fresh air & air recirculation flap actuator motor (on hvac unit)
• Fuse 15a
• Fuse 20a
• Gnd
• High side
• Hot at all times
• Kmv sk (+)
• Kmv sk (-)
• Komp pwr
• Komp rv (-)
• Left blending air flap actuator (on hvac unit)
• Left center air outlet flap actuator motor
• Left defroster vent flap actuator motor (on hvac unit)
• Left footwell flap actuator motor (on hvac unit)
• Lin b8 (+)
• Lin b8 data
• Lin b8 gnd
• Lin b8 rf
• Lin data
• Mr1
• Nca
• Ptc heater booster (if equipped)
• Rear actuator motor blend air flap with cut off function
• Red
• Refrigerant compressor
• Refrigerant pressure sensor (in left front wheelwell)
• Right blending air flap actuator (on hvac unit)
• Sig
• Sig li
• Sig re
• Vdf
• W1/4 (under center console)
• W15/9 (under center console)
• W2 (behind right headlight)
• W9 (left side of engine compt)
• Wah7g
• Wiper park heater
• Wiper park position heater relay
• X18-c1
• X18-c2
• X22/2-c2
• X25/2-c1
• X26-c1

Automatic A/C Wiring Diagram, without Thermotronic (2 of 2) for Mercedes-Benz ML550 2012

List of elements for Automatic A/C Wiring Diagram, without Thermotronic (2 of 2) for Mercedes-Benz ML550 2012:

• (-)
• (4.6l twin turbo) charge air cooler circulation pump
• (in right front wheelwell) w2/1
• (not used)
• (under center console) w1/4
• 3.0l
• 3.0l turbo diesel
• 3.5l
• 4.6l
• Aav
• Activated charcoal filter shutoff valve (left front wheelwell)
• Battery compartment prefuse box (under right front seat)
• Can-e1 h
• Can-e1 l
• Computer data lines system
• Coolant temperature sensor (3.0l: top left side of engine) (except 3.0l: left rear of engine)
• Engine compartment fuse & relay box (right side of enigne compt)
• Engine compartment prefuse box
• Engine controls system
• Except 3.0l turbo diesel
• Fan motor
• Front sam control unit w/ fuse & relay module
• Fuse 10a
• Fuse 125a
• Fuse 150a
• Fuse 15a
• Fuse 40a
• Gnd
• Hot at all times
• Hot w/ turbo charger relay energized
• Interior prefuse box
• Interior temperature sensor w/ integrated fan
• Left center air outlet symbol illumination (if equipped)
• Left footwell air outlet temperature sensor
• Left front side air outlet symbol illumination (if equipped)
• Left side air outlet temperature sensor
• Lin
• Lin b13
• Lues
• Me-sfi (me) control module (top center of engine)
• Outside temperature sensor
• Overhead control panel electronics
• Pwm
• Rear air distribution flap actuator motor (on hvac unit)
• Rear air duct air outlet temperature sensor
• Red
• Right center air outlet symbol illumination (if equipped)
• Right footwell air outlet temperature sensor
• Right front side air outlet symbol illumination (if equipped)
• Right side air outlet temperature sensor
• S14
• Sun sensor (top center of dash)
• Tmot
• Uhi
• Vehicle interior humidity/ temperature sensor
• W18/5 (near right "a" pillar)
• W2/1 (in right front wheelwell)
• W52/11 (right rear of engine compt)
• X122/2-c1
• X18-c1
• X25/2-c1
• X26/32
• X26/4-c1