AIR CONDITIONING – Mercedes-Benz S550 2009 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for Mercedes-Benz S550 2009

List of elements for Automatic A/C Wiring Diagram (1 of 3) for Mercedes-Benz S550 2009:

• (left front footwell) w34
• (right rear footwell) w17
• +12v
• +5v
• 12v
• 58d
• Aac (kla) control unit
• Can-b h
• Can-b l
• Computer data lines system
• Data
• Front center air outlet potentiometer
• Front sam control module w/ fuse & relay module
• Fuse 15a
• Fuse 20a
• Fuse 40a
• Gnd
• Hot at all times
• Hot w/ engine circuit 87 relay energized
• Klb 12v
• Klb data
• Klb gnd
• Left side air outlet potentiometer
• Lin 12v
• Lin bus
• Lin data
• Lin gnd
• Lin-bus
• Mr7
• Mr8
• Pnk
• Rear center air outlet potentiometer
• Red
• Refrigerant pressure sensor
• Right side air outlet potentiometer
• Sig
• W34

Automatic A/C Wiring Diagram (2 of 3) for Mercedes-Benz S550 2009

List of elements for Automatic A/C Wiring Diagram (2 of 3) for Mercedes-Benz S550 2009:

• (if equipped) a/c water valve
• (right rear of engine compt) aac multi-function sensor
• A/c compressor
• A/c recirculation unit
• A/c sun sensor
• Air conditioning connector
• Blower motor
• Blower regulator
• Can-e h
• Can-e l
• Computer data lines system
• Coolant temperature sensor (front of engine)
• Egs
• Electric suction fan engine & a/c w/ integrated control
• Engine controls system
• Footwell)
• Heated windshield control module (w/ special protection)
• Left b-pillar air distribution actuator motor
• Left rear center vent flap actuator motor
• Me-sfi (me) control unit (right rear of engine compt)
• Pnk
• Red
• Right b-pillar air distribution actuator motor
• Right rear center vent flap actuator motor
• W/ rear a/c
• W/o rear a/c
• W15 (right front computer data lines system
• W2 (right side of engine compt)

Automatic A/C Wiring Diagram (3 of 3) for Mercedes-Benz S550 2009

List of elements for Automatic A/C Wiring Diagram (3 of 3) for Mercedes-Benz S550 2009:

• (right of steering column under dash) evaporator temperature sensor
• Coolant circulation pump (right of radiator)
• Engine compartment prefuse box
• Fresh air/ recirculated air flap actuator motor (right side of hvac unit)
• Fuse 100a
• Hot at all times
• Left center air flap actuator motor
• Left defroster vent flap actuator motor (left side of hvac unit)
• Left footwell flap actuator motor (lower left side of hvac unit)
• Left footwell temperature sensor
• Left side outlet flap actuator motor
• Left side outlet temperature sensor
• Lower left blending air flap actuator motor
• Lower right blending air flap actuator motor
• Non-ventilated interior air in-car temperature cockpit sensor
• Pnk
• Red
• Right center air flap actuator motor
• Right defroster vent flap actuator motor (center of hvac unit)
• Right footwell flap actuator motor (lower center of hvac unit)
• Right footwell temperature sensor
• Right side outlet flap actuator motor
• Right side outlet temperature sensor
• Upper left bending air flap actuator motor
• Upper right blending air flap actuator motor
• W3/2 (left side of engine compartment)

Fresh Air Emergency System Wiring Diagram (1 of 2) for Mercedes-Benz S550 2009

List of elements for Fresh Air Emergency System Wiring Diagram (1 of 2) for Mercedes-Benz S550 2009:

• (left rear footwell) w7/1
• 15c
• Buzzer emergency
• C12
• Fresh air system
• Fresh air system diagnostic interface connector
• Fresh air system emergency control unit
• Fresh air system emergency pressure medium reservoir solenoid valve
• Fuse 5a
• Hot at all times
• Irritant gas system solenoid valve
• Irritant gas system solenoid valve double contact relay
• Left exhaust air flap motor
• Left exhaust air flap motor polarity- reversing relay
• Left exhaust air flap motor polarity-reversing relay
• Overvoltage protection diode
• Oxygen cylinder pressure sensor
• Rear fuse box i
• Right exhaust air flap motor
• Right exhaust air flap motor polarity- reversing relay
• Right exhaust air flap motor polarity-reversing relay
• Solenoid valve
• W/ medium reservoir solenoid valve
• W/o medium reservoir
• W7/1 (left rear footwell)
• Warning buzzer

Fresh Air Emergency System Wiring Diagram (2 of 2) for Mercedes-Benz S550 2009

List of elements for Fresh Air Emergency System Wiring Diagram (2 of 2) for Mercedes-Benz S550 2009:

• (not used)
• 58d
• Emergency vehicle system
• Fire extinguishing system control module
• Fire extinguishing system switch
• Fresh air sensor
• Fresh air system emergency activate button
• Fresh air system/fire extinguishing system emergency activate button
• Fresh air system/fire extinguishing system emergency activate button balance resistor
• Front sam control module w/ fuse & relay module
• Mr8
• Nca
• Pas (gas) & special signal system control module
• Red
• Solenoid valve
• Special vehicle multifunction control module (svmcm (mss))
• W/ medium reservoir solenoid valve
• W/o medium reservoir
• W3/2 (left side of engine compt)
• Windshield washer fluid pump (right front of engine compt)

Rear A/C Wiring Diagram for Mercedes-Benz S550 2009

List of elements for Rear A/C Wiring Diagram for Mercedes-Benz S550 2009:

• 12v
• Aac (kla) control unit
• Can-a h
• Can-a l
• Can-b h
• Can-b l
• Can-e h
• Can-e l
• Computer data lines system
• Coolant circulation pump
• Coolant temperature sensor (top front of engine)
• Egs
• Electric suction fan engine & a/c w/ integrated control
• Engine compartment prefuse box
• Engine controls system
• Front sam control module w/ fuse & relay module
• Fuse 100a
• Fuse 15a
• Fuse 20a
• Fuse 5a
• Heated windshield control module (w/ special protection)
• Hot at all times
• Hot w/ engine circuit 87 relay energized
• Left b-pillar air distribution actuator motor
• Left duovalve
• Left instrument panel fuse box (under left side dash cover)
• Left rear center vent flap actuator motor
• Left rear heater exchanger temperature sensor
• Lin (+)
• Lin (-)
• Lin bus
• Lin-data
• Me-sfi (me) control unit (right rear of engine compt)
• Pnk
• Rear a/c control module
• Rear a/c electronic blower regulator (in rear of center console)
• Rear blower motor (in rear of center console)
• Rear evaporator temperature sensor (rear of center console)
• Rear refrigerant shut-off valve (left front wheelhouse)
• Red
• Right b-pillar air distribution actuator motor
• Right duovalve
• Right rear center vent flap actuator motor
• Right rear heater exchanger temperature sensor
• W/ rear window defroster
• W/o rear window defroster
• W18 (under left front seat)
• W2 (right side of engine compt)