AIR CONDITIONING – Mercedes-Benz S550 4Matic 2012 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for Mercedes-Benz S550 4Matic 2012

List of elements for Automatic A/C Wiring Diagram (1 of 3) for Mercedes-Benz S550 4Matic 2012:

44

• (left front footwell) w34
• (right rear footwell) w17
• +12v
• +5v
• 12v
• 3.0l turbo diesel
• 4.6l twin turbo & 3.5l hybrid
• 58d
• Aac (kla) control unit (center dash)
• Can-b h
• Can-b l
• Computer data lines system
• Data
• Front center air outlet potentiometer
• Front sam control module w/ fuse & relay module (left rear engine compt)
• Fuse 10a
• Fuse 15a
• Fuse 20a
• Fuse 40a
• Fuse 5a
• Gnd
• Hot at all times
• Hot w/ chassis circuit 87 relay energized
• Hot w/ circulation pump relay energized
• 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
• Rear sam control module w/ fuse & relay module (center front of trunk)
• Red
• Refrigerant pressure sensor (left front wheelhouse)
• Right side air outlet potentiometer
• Sig
• W34 (left front footwell)

Automatic A/C Wiring Diagram (2 of 3) for Mercedes-Benz S550 4Matic 2012

List of elements for Automatic A/C Wiring Diagram (2 of 3) for Mercedes-Benz S550 4Matic 2012:

45

• (center rear of engine compt) (if equipped) a/c water valve
• (left rear of engine compt) a/c (kla) 4-way sun sensor
• (or -)
• (or egs)
• (or rv)
• (right rear of engine compt) aac (kla) multi-function sensor
• 3.0l turbo diesel
• 3.5l hybrid
• 4.6l twin turbo
• A/c air recirculation unit
• Air conditioning connector
• Blower motor
• Blower regulator
• Can-e h
• Can-e l
• Charge air cooler circulation pump (4.6l twin turbo) (right front wheelwell)
• Computer data lines system
• Coolant temperature sensor (5.5l:top front of engine)
• Electric suction fan engine & a/c w/ integrated control (behind center of radiator)
• Engine controls system
• Footwell)
• Heated windshield control unit (w/ special protection)
• Left b-pillar air distribution actuator motor (under left front seat)
• Left rear center air outlet actuator motor
• Lpv
• Lues
• Me-sfi (me) control unit (right rear of engine compt)
• Pnk
• Purge control valve (left front of engine compt)
• Red
• Refrigerant compressor
• Right b-pillar air distribution actuator motor (under right front seat)
• Right rear center air outlet actuator motor
• Tmot
• Tmot (or e a tomt1)
• Vehicle interior humidity/ temperature sensor
• W/ humidity sensor
• W/ rear a/c
• W/o rear a/c
• W15 (right front computer data lines system
• W15/1
• W9 (4.6l twin turbo & 3.0l turbo diesel) (under left headlight assembly) w2 (3.5l hybrid) (under right headlight assembly)
• X26-c1
• X53/1-c1
• X53/1-c3

Automatic A/C Wiring Diagram (3 of 3) for Mercedes-Benz S550 4Matic 2012

List of elements for Automatic A/C Wiring Diagram (3 of 3) for Mercedes-Benz S550 4Matic 2012:

53

• (left center of dash) left side outlet temperature sensor
• (left side of dash) non-ventilated interior air in-car temperature cockpit sensor
• (lower left side of evaporator) evaporator temperature sensor
• (lower left side of hvac unit)
• (right center of dash) right side outlet temperature sensor
• (right front footwell)
• (right front footwell) w15/1
• (right side under carriage) power electronics control unit
• (under left side of dash) left footwell temperature sensor
• (under right side of dash) right footwell temperature sensor
• 3.0l turbo diesel
• 3.5l hybrid &
• 4.6l twin turbo
• 87f
• Battery management system control unit (right rear engine compt)
• Can-i h
• Can-i l
• Computer data lines system
• Dc/dc converter control module (right front wheelhouse)
• Electric refrigerant compressor (left front engine)
• Engine compartment prefuse box (right rear engine compt)
• Engine coolant circulation pump (3.0l turbo diesel)
• Fresh air/ recirculated air flap actuator motor (right side of hvac unit)
• Fuse 100a
• Fuse 20a
• Fuse 60a
• Heater booster connector
• High voltage fuse box
• Hot at all times
• Hv +
• Hv -
• Interior prefuse box (right front footwell)
• Interlock in
• Interlock out
• Left center air flap actuator motor (left center of hvac unit)
• Left defroster vent flap actuator motor (top left side of hvac unit)
• Left footwell flap actuator motor (lower left center of hvac unit)
• Left side outlet flap actuator motor (top left center of hvac unit)
• Lower left blending air flap actuator motor
• Lower right blending air flap actuator motor (lower right side of hvac unit)
• Nca
• Pnk
• Ptc heater booster
• Red
• Right center air flap actuator motor (right center of hvac unit)
• Right defroster vent flap actuator motor (top right side of hvac unit)
• Right footwell flap actuator motor (lower right center of hvac unit)
• Right side outlet flap actuator motor (top right center of hvac unit)
• Upper left blending air flap actuator motor
• Upper right blending air flap actuator motor
• W15
• W3/2 (right rear of trunk)
• X73/2

Fresh Air Emergency System Wiring Diagram (1 of 2) for Mercedes-Benz S550 4Matic 2012

List of elements for Fresh Air Emergency System Wiring Diagram (1 of 2) for Mercedes-Benz S550 4Matic 2012:

24

• (right rear of trunk) w7/1
• 15c
• C12
• Fresh air system buzzer emergency warning buzzer (front of center console)
• Fresh air system diagnostic interface connector
• Fresh air system emergency control unit (left front of trunk)
• Fresh air system emergency pressure medium reservoir solenoid valve (left side of trunk)
• 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 side of trunk)
• Left exhaust air flap motor polarity- reversing relay
• Left exhaust air flap motor polarity-reversing relay
• Overvoltage protection diode
• Oxygen cylinder pressure sensor (left front of trunk)
• Rear fuse box i
• Right exhaust air flap motor (right side of trunk)
• 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 (right rear footwell)

Fresh Air Emergency System Wiring Diagram (2 of 2) for Mercedes-Benz S550 4Matic 2012

List of elements for Fresh Air Emergency System Wiring Diagram (2 of 2) for Mercedes-Benz S550 4Matic 2012:

25

• (not used)
• 58d
• Emergency vehicle system
• Fire extinguishing system control module (left front of trunk)
• Fire extinguishing system switch
• Fresh air sensor (right rear of engine compt)
• 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 (left rear engine compt)
• Mr8
• Nca
• Pas (gas) & special signal system control module (left front of trunk)
• Red
• Solenoid valve
• Special vehicle multifunction control module (svmcm (mss)) (left side of trunk)
• W/ medium reservoir solenoid valve
• W/o medium reservoir
• W3/2 (left side of engine compt)
• Windshield washer fluid pump (on washer fluid reservoir tank)
• X15/11
• X203
• X203/1
• X203/2
• X203/3

Rear A/C Wiring Diagram for Mercedes-Benz S550 4Matic 2012

List of elements for Rear A/C Wiring Diagram for Mercedes-Benz S550 4Matic 2012:

69

• (or -)
• (or fan)
• (or rv)
• (under left front seat) w18
• 100a
• 12v
• 3.0l turbo diesel
• 3.5l hybrid
• 4.6l twin turbo
• Aac (kla) control unit (center dash)
• Can-a h
• Can-a l
• Can-b h
• Can-b l
• Can-e h
• Can-e l
• Charge air cooler circulation pump (4.6l twin turbo) (right front wheelwell)
• Computer data lines system
• Coolant circulation pump
• Coolant temperature sensor (5.5l: top front of engine)
• Electric suction fan engine & a/c w/ integrated control (behind center of radiator)
• Engine compartment prefuse box (right rear engine compt)
• Engine controls system
• Front sam control module w/ fuse & relay module (left rear engine compt)
• Fuse
• Fuse 10a
• Fuse 15a
• Fuse 20a
• Fuse 5a
• Heated windshield control unit (w/ special protection)
• Hot at all times
• Hot w/ circulation pump relay energized
• Hot w/ engine circuit 87 relay energized
• Left b-pillar air distribution actuator motor (under left front seat)
• Left duovalve
• Left instrument panel fuse box (under left side dash cover)
• Left rear air conditioning heater exchanger temperature sensor (left rear of center console)
• Left rear center air outlet actuator motor
• Lin (+)
• Lin (-)
• Lin bus
• Lin-data
• Lpv
• Lues
• Me-sfi (me) control unit (right rear of engine compt)
• Pnk
• Purge control valve (left front of engine compt)
• Rear a/c control module
• Rear a/c electronic blower controller (in rear of center console)
• Rear blower motor
• Rear evaporator temperature sensor
• Rear refrigerant shut-off valve (rear of left front wheelwell)
• Rear sam control module w/ fuse & relay module (center front of trunk)
• Red
• Right b-pillar air distribution actuator motor (under right front seat)
• Right duovalve
• Right rear air conditioning heater exchanger temperature sensor (right rear of center console)
• Right rear center air outlet actuator motor
• Tmot
• Tmot (or e a tomt1)
• W/ rear window defroster
• W/o rear window defroster
• W15/1
• W18 (under left front seat)
• W9 (4.6l twin turbo & 3.0l turbo diesel) (under left headlight assembly) w2 (3.5l hybrid) (under right headlight assembly)
• X18-c4
• X53/1-c1
• X53/1-c3
• X64/10-c4