Mercedes-Benz SL550 2009 - 2009 MERCEDES-BENZ SL550, SL600, SL63 AMG & SL65 AMG

Mercedes-Benz SL550 2009 - BUZZERS, RELAYS & TIMERS

Mercedes-Benz SL550 2009 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
Air Pump (Or) Reserve Relay (O)	In passenger side fuse & relay module. See Fig. 3.
Battery Cut-Off Relay	Right side of trunk. See Fig. 46.
Circuit 15 Relay (B)	In driver side fuse & relay module. See Fig. 4.
Circuit 15R Relay (C)	In driver side fuse & relay module. See Fig. 4.
Circuit 15R/30 Cut-Off Relay	Right side of trunk. See Fig. 47.
Circuit 30Z Relay (M)	In passenger side fuse & relay module. See Fig. 3.
Engine Electronics & Chassis Relay (K)	In passenger side fuse & relay module. See Fig. 3.
Engine Oil Additional Fan Relay	Right front wheelwell. See Fig. 59.
Fanfare Horn Relay (P)	In passenger side fuse & relay module. See Fig. 3.
FAN Relay (P)	In passenger side fuse & relay module. See Fig. 3.
Fuel Pump Relay (T)	In rear fuse & relay module. See Fig. 61.
High Pressure & Return Pump Relay (F)	In driver side fuse & relay module. See Fig. 4.
Intank Fuel Pump Relay (AMG)	Behind passenger seat. See Fig. 45.
Intank Fuel Pump Relay (Except AMG) (K27/5)	Behind passenger seat . See Fig. 8.
Intercooler Circulation Pump Relay (AMG)	Behind passenger seat. See Fig. 50.
Intercooler Circulation Pump Relay (Except AMG) (R)	In rear fuse & relay module. See Fig. 61.
Rear Window Defroster Relay (U)	In rear fuse & relay module. See Fig. 61.
Relay 1 (RTL)	Part of RTL hydraulic unit. See Fig. 43.
Relay 2 (RTL)	Part of RTL hydraulic unit. See Fig. 44.
Reserve Relay (Q)	In rear fuse & relay module. See Fig. 61.
Starter Relay (L)	In passenger side fuse & relay module. See Fig. 3.
Steering Column Height Adjustment Relay 1 (I)	In driver side fuse & relay module. See Fig. 4.
Steering Column Height Adjustment Relay 2 (J)	In driver side fuse & relay module. See Fig. 4.
Steering Column Longitudinal Adjustment Relay 1 (D)	In driver side fuse & relay module. See Fig. 4.
Steering Column Longitudinal Adjustment Relay 2 (E)	In driver side fuse & relay module. See Fig. 4.
Wiper On/Off Relay (H)	In driver side fuse & relay module. See Fig. 4.
Wiper Park Position Heater Relay (A)	In driver side fuse & relay module. See Fig. 4.
Wiper Position 1 & 2 Relay (G)	In driver side fuse & relay module. See Fig. 4.

Mercedes-Benz SL550 2009 - CIRCUIT PROTECTION DEVICES

Mercedes-Benz SL550 2009 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Driver-Side Fuse & Relay Module (K40/2)	Left rear of engine compartment. See Fig. 1.
Front Prefuse Box (F32)	Right front footwell. See Fig. 1.
Passenger-Side Fuse & Relay Module (K40/4)	Right rear of engine compartment. See Fig. 1.
Rear Fuse & Relay Module (K40/5)	Behind passenger seat. See Fig. 1.
Rear Prefuse Box (F33)	Right side of trunk. See Fig. 1.

Mercedes-Benz SL550 2009 - CONTROL UNITS

Mercedes-Benz SL550 2009 CONTROL UNITS LOCATION

Component	Location
ABC Control Module	Near steering column. See Fig. 164.
AIRSCARF Control Unit	Right trunk lid. See Fig. 162.
Audio Gateway Control Module	Stowage compartment behind driver seat.
Blower Regulator	Mounted to blower motor.
Central Gateway Control Module	Right front footwell.
DC/DC Converter Control Module	Under left side of dash.
Driver-Side SAM Control Module (N10/10)	Under fuse & relay box. See Fig. 1.
DTR Control Module	Right front upper footwell. See Fig. 168.
E-Call Control Module	Under rear of center console.
ECI Ignition Module, Left Bank Of Cylinders (M275)	Left front of engine. See Fig. 175.
ECI Ignition Module, Right Bank Of Cylinders (M275)	Right front of engine. See Fig. 174.
ECI Ignition System Mains Unit	Top center of engine. See Fig. 173.
Electric Control Unit (VGS) (Y3/8)	In transmission. See Fig. 10.
Electric Control Unit (Y3/6)	In transmission. See Fig. 15.
Electronic Selector Lever Module Control Module	Near base of shift lever. See Fig. 161.
Emergency Call System Control Unit (N123/4)	Under rear of center console. See Fig. 13.
ESP, SPS & BAS (ESP, PML & BAS) Control Module	Left rear of engine compartment.
ETC (EGS) Control Module	Right footwell. See Fig. 160.
Frequency Switchover Control Module	Behind passenger seat.
Front Multicontour Backrest Control Module (Left/Right)	Inside respective backrest. See Fig. 163.
Fuel Pump Control Unit (N118)	Under right rear of vehicle. See Fig. 9.
Fully Integrated Transmission Control (VGS) Control Unit (Y3/8n4)	Integral to electric control unit (VGS). See Fig. 10.
Keyless Go Control Module	Left side of trunk. See Fig. 169.
Left Antenna Amplifier Module	Under left side of dash.
Left Door Actuator	Left door, door handle.
Left Door Control Module (N69/1)	Left door. See Fig. 14.
Left Front Seat Adjustment Control Module W/Memory (N32/1)	Under left front seat. See Fig. 13.
ME-SFI (ME) Control Module (M113)	Left rear of engine compartment. See Fig. 158.
ME-SFI (ME) Control Module (M156)	Left rear of engine compartment. See Fig. 159.
ME-SFI (ME) Control Module (M273)	Top of engine. See Fig. 157.
Navigation Processor	Left side of trunk.
Passenger-Side SAM Control Module (N10/11)	Under fuse & relay box. See Fig. 1.
PSE Control Module (Combined)	Left side of trunk.
PTS Control Module	Left side of trunk. See Fig. 167.
Rear SAM Control Module (N10/8)	Behind passenger seat. See Fig. 1.
Restraint Systems Control Module (N2/7)	Under front of center console. See Fig. 13.
Right Antenna Amplifier Module (A2/65)	Under right side of dash. See Fig. 14.
Right Door Actuator	Right door, door handle.
Right Door Control Module (N69/2)	Right door. See Fig. 14.
Right Front Seat Adjustment Control Module W/Memory (N32/2)	Under right front seat. See Fig. 13.
RSC (UVS) Control Module	Behind passenger seat. See Fig. 165.
RVC (UVS) Valve Block	Left side of trunk.
SBC Control Module	Part of SBC hydraulic unit.
SDAR Control Unit	Left side of trunk. See Fig. 171.
Steering Column Module	Top of steering column.
Steering Wheel Gear Shift Signal Processing Module	Inside steering wheel.
System Diagnosis Control Unit	Right footwell. See Fig. 166.
TPM Control Module	Left rear of trunk. See Fig. 172.
Universal Portable CTEL Interface (UPCI (UHI)) Control Module (MHI)	Behind passenger seat.
Vehicle Power Supply Control Module	Right side of trunk. See Fig. 170.
Voice Control System Control Module	Under rear of center console.
Weight Sensing System (WSS) Control Unit (N110)	Under right seat. See Fig. 13.

Mercedes-Benz SL550 2009 - MOTORS

Mercedes-Benz SL550 2009 MOTORS LOCATION

Component	Location
AIR Pump	Top front of engine.
Backrest Forward/Back Motor (Left Front Seat) (M27m5)	In left front seat backrest. See Fig. 12.
Backrest Forward/Back Motor (Right Front Seat) (M28m5)	In right front seat backrest. See Fig. 12.
Blower Motor	Under right side of dash.
Charge Air Cooler Circulation Pump (M44)	Right front of engine compartment. See Fig. 9.
Coolant Circulation Pump	Behind right side of front bumper.
Diverter Flap Actuator Motor (M16/27)	Top center of HVAC unit. See Fig. 11.
Electric Air Pump (M33)	Right front of engine compartment. See Fig. 9.
Electric Suction Fan Engine & AC With Integrated Control	Front center of engine compartment.
Engine Oil Additional Fan Unit	Behind right side of front bumper.
Forward/Back Motor (Left Front Seat) (M27m1)	Under left front seat. See Fig. 12.
Forward/Back Motor (Right Front Seat) (M28m1)	Under right front seat. See Fig. 12.
Fresh Air/Recirculated Air Flap Actuator Motor (M16/21)	Right side of HVAC unit. See Fig. 11.
Front Up/Down Motor (Left Front Seat) (M27m3)	Under left front seat. See Fig. 12.
Front Up/Down Motor (Right Front Seat) (M28m3)	Under right front seat. See Fig. 12.
Fuel Pump (M3)	Under right rear of vehicle. See Fig. 9.
HCS Pump	In washer fluid reservoir.
Head Restraint Raise/Lower Motor (Left Front Seat) (M27m4)	In left front seat backrest. See Fig. 12.
Head Restraint Raise/Lower Motor (Right Front Seat) (M28m4)	In right front seat backrest. See Fig. 12.
Heat Exchanger Shutoff Motor	Right rear of engine compartment.
Heating Systems Recirculation Unit	Under right side of dash.
Height Adjustment Up/Down Motor	Top of steering column.
High-Pressure Charging Pump	Part of SBC hydraulic unit.
Left Blending Air Flap Actuator (M16/28)	Left side of HVAC unit. See Fig. 11.
Left Center Nozzle Air Flap Actuator Motor (M16/23)	Left front of HVAC unit. See Fig. 11.
Left Defroster Vent Flap Actuator (M16/13)	Left side of HVAC unit. See Fig. 11.
Left Footwell Flap Actuator Motor (M16/15)	Left side of HVAC unit. See Fig. 11.
Left Front Power Window Motor	Left door.
Left Rear Power Window Motor	Behind left quarterpanel.
Left Side Outlet Air Flap Actuator Motor (M16/25)	Left side of HVAC unit. See Fig. 11.
Longitudinal Adjustment Forward/Back Motor	Right side of steering column.
Motor (RTL)	Part of RTL hydraulic unit.
Motor (RVC (UVS) Hydraulic Unit)	Part of RVC (UVS) hydraulic unit.
Rear Up/Down Motor (Left Front Seat) (M27m2)	Under left front seat. See Fig. 12.
Rear Up/Down Motor (Right Front Seat) (M28m2)	Under right front seat. See Fig. 12.
Recirculated Air Flap Actuator (5.5L V8) (M16/7)	Center rear of engine. See Fig. 6.
Right Blending Air Flap Actuator (M16/29)	Middle of HVAC unit. See Fig. 11.
Right Center Nozzle Air Flap Actuator Motor (M16/24)	Center front of HVAC unit. See Fig. 11.
Right Defroster Vent Flap Actuator (M16/14)	Top center of HVAC unit. See Fig. 11.
Right Footwell Flap Actuator Motor (M16/16)	Middle of HVAC unit. See Fig. 11.
Right Front Power Window Motor	Right door.
Right Rear Power Window Motor	Behind right quarterpanel.
Right Side Outlet Air Flap Actuator Motor (M16/26)	Middle of HVAC unit. See Fig. 11.
Seat Cushion Forward/Back Motor (Left Front Seat) (M27/M6)	Under left front seat. See Fig. 12.
Seat Cushion Forward/Back Motor (Right Front Seat) (M28/M6)	Under right front seat. See Fig. 12.
Side Flaps Motor	In trunk lid.
Starter	Lower right rear of engine.
Throttle Valve Actuator (5.5L V8) (M16/6)	On throttle body. See Fig. 7.
Windshield Washer Fluid Pump	In washer fluid reservoir.
Wiper Motor	Left rear of engine compartment.

Mercedes-Benz SL550 2009 - SENDING UNITS & SENSORS

Mercedes-Benz SL550 2009 SENDING UNITS & SENSORS LOCATION

Component	Location
AAC (KLA) Multifunction Sensor	Right rear of engine compartment.
AAC (KLA) Sun Sensor (4)	Left rear of engine hood.
ABC Lateral Acceleration Sensor	Right side of transmission tunnel.
ABC Longitudinal Acceleration Sensor	Left front footwell.
ABC Oil Temperature Sensor	Behind left side of front bumper.
ABC Pressure Sensor	Behind left side of front bumper.
Accelerator Pedal Sensor	Top of accelerator pedal assembly.
Ambient Temperature Display Temperature Sensor	Behind left side of front bumper.
ATA (EDW) Inclination Sensor (B33)	Left side of trunk. See Fig. 14.
Automatic Light Switch Daylight Sensor	Center front of roof.
Belt Tension Sensor (B48/3)	Right side of right front seat. See Fig. 13.
Camshaft Hall Sensor (5.5L V8) (B6/1)	Right front of engine. See Fig. 7.
Charge Air Temperature Sensor (5.5L V8) (B17/8)	Center rear of engine. See Fig. 6.
Coolant Temperature Sensor (5.5L V8) (B11/4)	Right front of engine. See Fig. 7.
Crankshaft Hall Sensor	Rear of engine.
Crankshaft Position Sensor (5.5L V8) (L5)	Left rear of engine. See Fig. 6.
Driver-Side Frontal Acceleration Sensor (B48/1)	Left front of engine compartment. See Fig. 13.
DTR Radar Sensor	Front center of engine compartment.
Evaporator Temperature Sensor	Under left side of dash.
Front Axle Pre-Pressure Sensor	Part of SBC hydraulic unit.
Front Passenger Seat Occupied & Child Seat Recognition Sensor (B48)	Under right front seat. See Fig. 13.
Fuel Level Sensor	Top center of fuel tank.
Fuel Pressure Sensor	Under left rear of vehicle.
Fuel Tank Pressure Sensor	Top center of fuel tank.
Hot Film MAF Sensor (M273)	Center rear of engine. See Fig. 176.
Internal Speed Sensor (VGS) (Y3/8n2)	Integral to electric control unit (VGS). See Fig. 10.
Left Door Capacitive Sensor	Part of left door actuator.
Left Front ABC Pressure Sensor	Behind left side of front bumper.
Left Front Body Lateral Acceleration Sensor	Left side of engine compartment.
Left Front Brake Pad Contact Sensor	Left front wheel assembly.
Left Front IR Receiver (A26/1)	Left door, door handle. See Fig. 14.
Left Front Level Sensor	Left front wheelwell.
Left Front Plunger Travel Sensor	Inside left front shock absorber.
Left Front Pressure Sensor	Part of SBC hydraulic unit.
Left Knock Sensor 2	Top left side of engine block.
Left Knock Sensor 2 (5.5L V8) (A16/2)	Top center of engine. See Fig. 7.
Left O2 Sensor Downstream Of TWC (G3/5)	In left exhaust. See Fig. 5.
Left O2 Sensor Upstream Of TWC (G3/3)	In left exhaust, upstream of catalytic converter. See Fig. 5.
Left Rear ABC Pressure Sensor	Left rear wheelwell.
Left Rear Body Lateral Acceleration Sensor	Left side of trunk.
Left Rear Level Sensor	Under left rear of vehicle.
Left Rear Plunger Travel Sensor	Inside left rear shock absorber.
Left Rear Pressure Sensor	Part of SBC hydraulic unit.
Left Side Air Bag Sensor (A53)	Stowage compartment behind driver seat. See Fig. 13.
N-Car Temperature Sensor	Center front of roof.
Oil Sensor (Oil Level, Temperature & Quality) (B40)	Bottom of engine oil pan. See Fig. 9.
Output Speed Sensor (VGS) (Y3/8n3)	Integral to electric control unit (VGS). See Fig. 10.
Passenger Seat Occupied & Child Seat Recognition Sensor	Under right front seat.
Passenger-Side Frontal Acceleration Sensor (B48/2)	Right front of engine compartment. See Fig. 13.
Pressure Sensor (Charge Air) (5.5L V8) (B28)	Center rear of engine. See Fig. 6.
Pressure Sensor (Front Passenger Seat) (B48/4)	Under right front seat. See Fig. 13.
PTS Sensor Unit, Front Bumper	Part of front bumper.
PTS Sensor Unit, Rear Bumper	Part of rear bumper.
Rain/Light Sensor	Center front of roof.
Rain Sensor	Center front of roof.
Refrigerant Pressure & Temperature Sensor	Left front of engine compartment.
Reservoir Sensor	Part of SBC hydraulic unit.
Right Door Capacitive Sensor	Part of right door actuator.
Right Front ABC Pressure Sensor	Behind left side of front bumper.
Right Front Body Lateral Acceleration Sensor	Right side of engine compartment.
Right Front Brake Pad Contact Sensor	Right front wheel assembly.
Right Front IR Receiver (A26/2)	Right door, door handle. See Fig. 14.
Right Front Level Sensor	Right front wheelwell.
Right Front Plunger Travel Sensor	Inside right front shock absorber.
Right Front Pressure Sensor	Part of SBC hydraulic unit.
Right Knock Sensor 1 (5.5L V8) (A16/1)	Top center of engine. See Fig. 7.
Right O2 Sensor Downstream Of TWC (G3/6)	In right exhaust. See Fig. 5.
Right O2 Sensor Upstream Of TWC (G3/4)	In right exhaust, upstream of catalytic converter.
Right Rear ABC Pressure Sensor	Left rear wheelwell.
Right Rear Body Lateral Acceleration Sensor	Right side of trunk.
Right Rear Brake Pad Contact Sensor	Right rear wheel assembly.
Right Rear Level Sensor	Under right rear of vehicle.
Right Rear Plunger Travel Sensor	Inside right rear shock absorber.
Right Rear Pressure Sensor	Part of SBC hydraulic unit.
Right Side Air Bag Sensor (A54)	Behind passenger seat. See Fig. 13.
RPM Sensor 2 (Y3/6n2)	Integral to electric control unit. See Fig. 15.
RPM Sensor 3 (Y3/6n3)	Integral to electric control unit. See Fig. 15.
SBC Pedal Value Sensor	Behind brake fluid reservoir.
Selection Range Sensor (VGS) (Y3/8s1)	Integral to electric control unit (VGS). See Fig. 10.
Selector Lever Position Sensor	At base of shift lever assembly.
Steering Angle Sensor	Part of steering column module.
Temperature Sensor (RTL)	Part of RTL hydraulic unit.
TPM (RDK) Wheel Sensors (4)	Inside respective wheel assemblies.
Transmission Oil Temperature Sensor (VGS) (Y3/8s2)	Integral to electric control unit (VGS). See Fig. 10.
Transmission Oil Temperature Sensor (Y3/6b1)	Integral to electric control unit. See Fig. 15.
Trunk Lid Opening Angle Recognition Sensor	Left side of trunk lid.
Turbine Speed Sensor (VGS) (Y3/8n1)	Integral to electric control unit (VGS). See Fig. 10.
Turn Rate & Lateral Acceleration Sensor	Behind passenger seat.
Vehicle-Sensitive Seat Belt Lock Sensor (A60)	Behind passenger seat. See Fig. 13.
Wheel Speed Sensors (4)	At respective wheel assemblies.

Mercedes-Benz SL550 2009 - SOLENOIDS & SOLENOID VALVES

Mercedes-Benz SL550 2009 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
ABC Front Axle Valve Unit	In left front wheelwell. See Fig. 75.
ABC Rear Axle Valve Unit	In left rear wheelwell. See Fig. 74.
ABC Suction Restrictor Valve	Left front of engine. See Fig. 63.
Activated Charcoal Filter Shutoff Valve	Right rear wheelwell. See Fig. 67.
Air Pump Switchover Valve (V12) (Y32)	Left rear of engine. See Fig. 76.
Air Pump Switchover Valve (5.5L V8) (Y32)	Right front of engine. See Fig. 6.
B1 Brake Control Solenoid Valve (VGS) (Y3/8y5)	Integral to electric control unit (VGS). See Fig. 10.
B2 Brake Control Solenoid Valve (VGS) (Y3/8y6)	Integral to electric control unit (VGS). See Fig. 10.
B3 Brake Control Solenoid Valve (VGS) (Y3/8y7)	Integral to electric control unit (VGS). See Fig. 10.
Close Vario Roof Solenoid Valve	Integral to RVC (UVS) valve block.
CL (ZV) Remote Trunk Lid Opening Solenoid	In trunk lid. See Fig. 64.
Cylinder Fuel Injection Valves (V12) (Y62y1 - Y62y6)	Top of right cylinder bank. See Fig. 65.
Cylinder Fuel Injection Valves (V12) (Y62y7 - Y62y12)	Top of left cylinder bank. See Fig. 66.
Cylinder Fuel Injection Valves (5.5L V8) (Y62y1 - Y62y4)	Top of right cylinder bank. See Fig. 7.
Cylinder Fuel Injection Valves (5.5L V8) (Y62y5 - Y62y8)	Top of left cylinder bank. See Fig. 7.
Divert Air Switchover Valve	Right rear of engine. See Fig. 62.
Front Axle Balance Valve	Part of SBC hydraulic unit.
Fuel Pressure Damper (5.5L V8) (40)	On rear of fuel rail. See Fig. 7.
Heating System Shutoff Valve (V8)	Left rear of engine. See Fig. 81.
Intake Manifold Tumble Flap Switchover Valve	Front of intake manifold. See Fig. 79.
Keyless Go Left Door Lift Solenoid	Left door.
Keyless Go Right Door Lift Solenoid	Right door.
K1 Clutch Control Solenoid Valve (VGS) (Y3/8y2)	Integral to electric control unit (VGS). See Fig. 10.
K2 Clutch Control Solenoid Valve (VGS) (Y3/8y3)	Integral to electric control unit (VGS). See Fig. 10.
K3 Clutch Control Solenoid Valve (VGS) (Y3/8y4)	Integral to electric control unit (VGS). See Fig. 10.
Left Aspirator Shutoff Valve (5.5L V8) (126/1)	Left front of engine. See Fig. 6.
Left Camshaft Exhaust Solenoid	Front of left cylinder bank. See Fig. 71.
Left Camshaft Intake Solenoid	Front of left cylinder bank. See Fig. 73.
Left Front Inlet Control Valve	Part of SBC hydraulic unit.
Left Front Outlet Control Valve	Part of SBC hydraulic unit.
Left Front Seat Belt Comfort Solenoid	Left seat, inside backrest. See Fig. 60.
Left Front Seat Belt Lock Adjusting Solenoid (Y96)	Left seat, inside backrest. See Fig. 13.
Left Front Separation Valve	Part of SBC hydraulic unit.
Left Front Suspension Strut Blocking Valve	Integral to ABC front axle valve unit.
Left Front Suspension Strut Control Valve	Integral to ABC front axle valve unit.
Left Rear Inlet Control Valve	Part of SBC hydraulic unit.
Left Rear Outlet Control Valve	Part of SBC hydraulic unit.
Left Rear Suspension Strut Blocking Valve	Integral to ABC rear axle valve unit.
Left Rear Suspension Strut Control Valve	Integral to ABC rear axle valve unit.
Load Assist Solenoid Valve	Integral to RVC (UVS) valve block.
Main Valve	Integral to RVC (UVS) valve block.
Modulating Pressure Control Solenoid Valve (Y3/6y1)	Integral to electric control unit. See Fig. 15.
Open Vario Roof Solenoid Valve	Integral to RVC (UVS) valve block.
Power Steering Pump Pressure Regulator Valve	Lower left front of engine. See Fig. 82.
Purge Control Valve (Y58/1)	Left front of engine compartment. See Fig. 8.
RB (URB) Deployment Solenoid	Behind right quarterpanel. See Fig. 68.
Rear Axle Balance Valve	Part of SBC hydraulic unit.
Right Aspirator Shutoff Valve (5.5L V8) (126/2)	Right front of engine. See Fig. 6.
Right Camshaft Exhaust Solenoid (V8)	Front of left cylinder bank. See Fig. 70.
Right Camshaft Intake Solenoid	Front of right cylinder bank. See Fig. 72.
Right Front Inlet Control Valve	Part of SBC hydraulic unit.
Right Front Outlet Control Valve	Part of SBC hydraulic unit.
Right Front Seat Belt Comfort Solenoid	Right seat, inside backrest. See Fig. 60.
Right Front Seat Belt Lock Adjusting Solenoid (Y96/1)	Right seat, inside backrest. See Fig. 13.
Right Front Separation Valve	Part of SBC hydraulic unit.
Right Front Suspension Strut Blocking Valve	Integral to ABC front axle valve unit.
Right Front Suspension Strut Control Valve	Integral to ABC front axle valve unit.
Right Rear Inlet Control Valve	Part of SBC hydraulic unit.
Right Rear Outlet Control Valve	Part of SBC hydraulic unit.
Right Rear Suspension Strut Blocking Valve	Integral to ABC rear axle valve unit.
Right Rear Suspension Strut Control Valve	Integral to ABC rear axle valve unit.
Roll Bar Up Solenoid Valve	Integral to RVC (UVS) valve block.
RTL Hydraulic Unit	Left side of trunk.
RVC (UVS) Valve Block	Left side of trunk. See Fig. 69.
SBC Hydraulic Unit	Right front of engine compartment.
Shift Pressure Control Solenoid Valve (Y3/6y2)	Integral to electric control unit. See Fig. 15.
SPS (PML) Solenoid Valve	Under left front of vehicle. See Fig. 83.
Supercharger Magnetic Clutch (5.5L V8) (Y2/1)	Top front of engine. See Fig. 7.
Torque Converter Lockup Clutch Control Solenoid Valve (VGS) (Y3/8y8)	Integral to electric control unit (VGS). See Fig. 10.
Torque Converter Lockup PWM Solenoid Valve (Y3/6y6)	Integral to electric control unit. See Fig. 15.
Trunk Lid Remote Closing Proportioning Valve	Part of RTL hydraulic unit.
Trunk Lid Remote Closing Solenoid Valve	Part of RTL hydraulic unit.
Tubular Frame & Vario Roof Latches Solenoid Valve	Integral to RVC (UVS) valve block.
Variable Intake Manifold Switchover Valve	Front of intake manifold. See Fig. 80.
Working Pressure Control Solenoid Valve (VGS) (Y3/8y1)	Integral to electric control unit (VGS). See Fig. 10.
1-2 & 4-5 Shift Solenoid Valve (Y3/6y3)	Integral to electric control unit. See Fig. 15.
2-3 Shift Solenoid Valve (Y3/6y5)	Integral to electric control unit. See Fig. 15.
3-4 Shift Solenoid Valve (Y3/6y4)	Integral to electric control unit. See Fig. 15.

Mercedes-Benz SL550 2009 - SWITCHES

Mercedes-Benz SL550 2009 SWITCHES LOCATION

Component	Location
ATA (EDW) Left Engine Hood Switch (A62)	Left front of engine compartment. See Fig. 14.
ATA (EDW) Right Engine Hood Switch (A62/1)	Right front of engine compartment. See Fig. 14.
Brake Fluid Indicator Switch	In brake fluid reservoir.
Center Console Storage Compartment ATA (EDW) Switch (S62/32)	Front of center console compartment. See Fig. 14.
Coolant Level Indicator Switch	Right front of engine compartment.
Glove Box Switch (ATA (EDW)) (S62/7)	Glove compartment. See Fig. 14.
Kickdown Switch	Under accelerator pedal.
Left Door Contact Switch (S17/3)	Left "B" pillar. See Fig. 14.
Left Door Pull Contact Microswitch	Part of left door actuator.
Left Door Push Contact	Part of left door actuator.
Left Front Seat Belt Buckle Microswitch	Integral to driver's seat belt buckle assembly.
Left Front Seat Belt Buckle Restraint Systems Switch	Integral to driver's seat belt buckle assembly.
Left Side Flap Closed/Opened Limit Switch	Left side of trunk lid.
Left Tubular Frame Locked Limit Switch	Left side of trunk.
Loading Assist Up/Down Limit Switch	Left "C" pillar.
Oil Level Switch	Right front oil pan.
Parking Brake Indicator Switch	Base of parking brake lever assembly.
Pawl Rotary Tumbler Switch (S88/4)	Trunk lid. See Fig. 14.
Right Door Contact Switch (S17/4)	Right "B" pillar. See Fig. 14.
Right Door Pull Contact Microswitch	Part of right door actuator.
Right Door Push Contact	Part of right door actuator.
Right Front Seat Belt Buckle Microswitch	Integral to front passenger's seat belt buckle assembly.
Right Front Seat Belt Buckle Restraint Systems Switch	Integral to front passenger's seat belt buckle assembly.
Right Side Flap Closed/Opened Limit Switch	Right side of trunk lid.
Right Tubular Frame Locked Limit Switch	Right side of trunk.
Roll Bar Down/Up Limit Switch	Behind right rear quarterpanel.
Starter Lockout Contact (Y3/6s1)	Integral to electric control unit. See Fig. 15.
Stop Lamp Switch (4-Pin)	Top of brake pedal assembly.
Trunk Lid Opened Limit Switch	Right side of trunk.
Trunk Partition Closed Limit Switch	Right rear of trunk.
Tubular Frame Open Limit Switch	Left rear of trunk.
Vario-Roof (Closed) Limit Switch (Right Lug)	Right front of roof.
Vario-Roof (Locked) Limit Switch (Left Rotary Tumbler)	Left front of roof.
Vario-Roof (Locked) Limit Switch (Right Rotary Tumbler)	Right front of roof.
Vario-Roof (Open/Lowered) Limit Switch	Left "C" pillar.
Windshield Washer Fluid Level Indicator Switch	On washer fluid reservoir.

Mercedes-Benz SL550 2009 - MISCELLANEOUS

Mercedes-Benz SL550 2009 MISCELLANEOUS LOCATION

Component	Location
Alarm Signal Horn (H3)	Left front wheelwell. See Fig. 14.
Alternator (5.5L V8) (G2)	Lower right front of engine. See Fig. 7.
Antenna Splitter	Left front footwell.
Boost Pressure Control Vacuum Transducer	Left rear of engine. See Fig. 77.
Bridge (S)	In rear fuse & relay module. See Fig. 2.
Center Console Keyless Go Antenna	Under front of center console.
Central TPM (RDK) Antenna	Under right side of vehicle.
CTEL Antenna	On left rear fender.
Cylinder Ignition Coils (V8) (T1/1 - T1/4)	Top of right cylinder bank. See Fig. 6.
Cylinder Ignition Coils (V8) (T1/5 - T1/8)	Top of left cylinder bank. See Fig. 7.
Driver Air Bag Ignition Squib 1 (R12/13)	Inside steering wheel. See Fig. 13.
Driver Air Bag Ignition Squib 2 (R12/14)	Inside steering wheel. See Fig. 13.
Driver ETR (GUS) Ignition Squib (R12/1)	Left seat, inside backrest. See Fig. 13.
Driver Kneebag Ignition Squib (R12/25)	Left front upper footwell. See Fig. 13.
Drive Train CAN Resistor	Left rear of engine compartment. See Fig. 48.
EGR (ARF) Vacuum Transducer	Right rear of engine. See Fig. 78.
Electrolytic Capacitor (Rear Window Noise Suppressor)	In left "C" pillar.
Emergency Call Spare Antenna	Under center of rear parcel shelf.
E-Net Compensator	Stowage compartment behind driver seat.
Fanfare Horns & Air Bag Clock Spring Contact	Top of steering column.
Front Passenger Air Bag Squib 1 (R12/4)	Behind right side of dash. See Fig. 13.
Front Passenger Air Bag Squib 2 (R12/5)	Behind right side of dash. See Fig. 13.
Front Passenger ETR (GUS) Squib (R12/2)	Right seat, inside backrest. See Fig. 13.
Generator	Right front of engine.
GPS Antenna	Front center of roof.
Keyless Go Left Door Antenna	Left door.
Keyless Go Rear Bumper Antenna	Behind center of rear bumper.
Keyless Go Right Door Antenna	Right door.
Left Fanfare Horn	Behind left side of front bumper.
Left Front Seat Ventilation Blower Regulator	Left seat, inside backrest.
Left Front Side Air Bag Squib (R12/20)	Left door. See Fig. 13.
Left Front TPM (RDK) Wheel Antenna	Left front wheelwell.
Left Heated Windshield Washer Nozzle	Left rear of engine hood.
Left Rear TPM (RDK) Wheel Antenna	Left rear wheelwell.
Left Trunk Keyless-Go Antenna	Center rear of trunk.
On-Board Electrical System Battery	Right rear of trunk.
Overload Protection Thermocouple	Part of RVC (UVS) hydraulic unit.
Radio Interference Suppression Capacitor 1	Top front of engine.
Rear Keyless Go Antenna	Under center of rear parcel shelf.
Rear Shelf Antenna	Part of rear shelf.
Rear Shelf Antenna Amplifier	Left front of trunk.
Right Fanfare Horn	Behind right side of front bumper.
Right Front Seat Ventilation Blower Regulator	Right seat, inside backrest.
Right Front Side Air Bag Squib (R12/21)	Right door. See Fig. 13.
Right Front TPM (RDK) Wheel Antenna	Right front wheelwell.
Right Heated Windshield Washer Nozzle	Right rear of engine hood.
Right Rear TPM (RDK) Wheel Antenna	Right rear wheelwell.
Right Trunk Keyless-Go Antenna	Right side of trunk.
SDAR Antenna	Top center of trunk lid.
Sound Amplifier	Stowage compartment behind driver seat.
Spark Plugs (8)	Top of left/right cylinder block.
Starter Battery	Right rear of engine compartment.
Suction Fan Resistor	Left rear of engine compartment. See Fig. 49.
Telephone Interface (PSE)	Stowage compartment behind driver seat.
Washer Nozzle Hose Heater	At washer fluid reservoir.
Wiper Park Heater	Base of windshield.

Mercedes-Benz SL550 2009 - CONNECTORS

Mercedes-Benz SL550 2009 CONNECTORS LOCATION

Component	Location
X8/4	Left rear of trunk. See Fig. 58.
X26/2	Top left side of engine. See Fig. 57.
X28/8 (Yellow, 2 Pin)	Under driver's seat. See Fig. 51.
X28/9 (Yellow, 2 Pin)	Under front passenger's seat. See Fig. 56.
X39/5 (Blue, 10 Pin)	Under rear of center console. See Fig. 52.
X111	Left rear of trunk. See Fig. 53.
X113	Center front of trunk. See Fig. 54.
X118/1	On steering column. See Fig. 55.

Mercedes-Benz SL550 2009 - GROUNDS

Mercedes-Benz SL550 2009 GROUNDS LOCATION

Component	Location
W3/1	Right front of engine compartment. See Fig. 16.
W3/2	Left front of engine compartment. See Fig. 17.
W6	Left side of trunk. See Fig. 18.
W6/1	Left rear of trunk. See Fig. 19.
W7	Right side of trunk. See Fig. 20.
W10	Right side of trunk. See Fig. 21.
W10/1	Top center of engine. See Fig. 35.
W10/3	Right rear of engine compartment. See Fig. 22.
W11w1	Right rear of engine. See Fig. 39.
W11w2	Left rear of engine. See Fig. 40.
W11/2	Top right front of engine. See Fig. 36.
W11/3 (V12)	Top left front of engine. See Fig. 38.
W11/3 (5.5L V8)	Front of engine. See Fig. 23.
W11/3 (5.5L V8)	Top right front of engine. See Fig. 37.
W14/3	Right front of engine compartment. See Fig. 24.
W15	Near right "B" pillar. See Fig. 25.
W15/3	Top front of engine. See Fig. 41.
W24	Near right "B" pillar. See Fig. 26.
W26	Under front of center console. See Fig. 27.
W30	Under rear of center console. See Fig. 28.
W34/1	Under left end of dash. See Fig. 29.
W34/2	Under right side of dash. See Fig. 30.
W36	Right front footwell. See Fig. 31.
W37	Left front footwell. See Fig. 32.
W46	Top right front of engine. See Fig. 42.
W56	Left front footwell. See Fig. 33.
W58	Behind front passenger's seat. See Fig. 34.

Mercedes-Benz SL550 2009 - SPLICES

Mercedes-Benz SL550 2009 SPLICES LOCATION

Component	Location
Z3/4	Under front of center console. See Fig. 136.
Z3/12	Right front of trunk, inside wiring harness beside tank. See Fig. 137.
Z3/29	Behind passenger seat. See Fig. 138.
Z3/29z1	Left side of engine. See Fig. 139.
Z3/29z2	Top front of engine. See Fig. 140.
Z3/42	Stowage compartment, behind driver seat. See Fig. 141.
Z4/3	Under rear of center console. See Fig. 142.
Z4/4	Left front footwell. See Fig. 143.
Z4/5	Front of roof. See Fig. 144.
Z4/7	Behind passenger seat. See Fig. 145.
Z5z2	Right side of engine. See Fig. 146.
Z6	Right side of engine. See Fig. 147.
Z6/1	Left seat, inside backrest. See Fig. 148.
Z6/2	Right seat, inside backrest. See Fig. 148.
Z6/3	Left rear engine compartment. See Fig. 149.
Z6/4	Left rear of engine compartment. See Fig. 150.
Z6/8	Left rear of engine compartment. See Fig. 151.
Z6/26 (M113, M113K)	Left rear of engine compartment. See Fig. 154.
Z6/26 (M156)	Right side of transmission. See Fig. 153.
Z6/26 (M273)	Right side of engine. See Fig. 152.
Z6/27 (M156)	Right front of engine. See Fig. 155.
Z6/27 (M275)	Left rear of engine compartment. See Fig. 156.
Z6/33z1	Left front footwell.
Z6/33z2	Left front footwell.
Z6/48z2	Left rear engine. See Fig. 135.
Z6/92	Right side of trunk lid. See Fig. 134.
Z7/19	Left rear interior. See Fig. 133.
Z7/35z1 (M113)	Left rear of engine. See Fig. 132.
Z7/35z1 (M273)	Right of engine. See Fig. 131.
Z7/35z2 (M113)	Front of engine. See Fig. 130.
Z7/35z2 (M273)	Left rear of engine. See Fig. 129.
Z7/35z3	Left rear of engine. See Fig. 128.
Z7/35z4	Right rear of engine. See Fig. 127.
Z7/36	Left of engine. See Fig. 177.
Z7/36z1	Right side of engine. See Fig. 126.
Z7/36z2	Top left side of engine. See Fig. 125.
Z7/38	Top right side of engine. See Fig. 124.
Z7/38z1	Top right side of engine. See Fig. 123.
Z7/38z2 (V12)	Top left side of engine. See Fig. 122.
Z7/39	Rear of engine. See Fig. 121.
Z7/40	Behind passenger seat. See Fig. 120.
Z7/41	Right rear of engine. See Fig. 119.
Z7/43	Top right side of engine. See Fig. 118.
Z7/43z1	Right rear of engine. See Fig. 117.
Z7/43z2	Right rear of engine. See Fig. 116.
Z7/44	Rear of engine. See Fig. 115.
Z7/49	Inside wiring harness, left of tank. See Fig. 114.
Z7/61	Left rear of engine compartment. See Fig. 113.
Z7/98z1	Right rear of engine. See Fig. 112.
Z7.98z2	Left rear engine. See Fig. 111.
Z7/98z3	Left rear engine compartment. See Fig. 110.
Z9	Behind passenger seat. See Fig. 109.
Z10	Left front footwell. See Fig. 108.
Z11	Left front footwell. See Fig. 107.
Z12	Left front footwell. See Fig. 106.
Z13	Left front footwell. See Fig. 105.
Z14	Under rear of center console. See Fig. 104.
Z15	Under rear of center console. See Fig. 103.
Z24	Right rear of engine compartment. See Fig. 102.
Z28/1	Left rear interior. See Fig. 101.
Z28/2	Left rear interior. See Fig. 101.
Z28/25	Stowage compartment, behind driver seat. See Fig. 100.
Z28/26	Stowage compartment, behind driver seat. See Fig. 99.
Z28/35	Inside wiring harness, left of tank. See Fig. 98.
Z36/1	Left rear of trunk. See Fig. 97.
Z36/2	Left rear of trunk. See Fig. 96.
Z36/3	Behind left side of front bumper. See Fig. 95.
Z36/4	Behind left side of front bumper. See Fig. 94.
Z50/1	Right rear of engine compartment. See Fig. 93.
Z53/9	Under front of center console. See Fig. 92.
Z61/1	Left seat, inside backrest. See Fig. 91.
Z61/2	Right seat, inside backrest. See Fig. 91.
Z61/8	Left seat, inside backrest. See Fig. 90.
Z61/9	Right seat, inside backrest. See Fig. 90.
Z61/10	Left seat, inside backrest. See Fig. 89.
Z61/11	Right seat, inside backrest. See Fig. 89.
Z84/1	Front of engine. See Fig. 88.
Z84/2	Front of engine. See Fig. 88.
Z100/5	Center rear of interior. See Fig. 87.
Z113	Right rear of engine compartment. See Fig. 85.
Z167/1	Right doorsill. See Fig. 84.
Z1000/1	Front floor console. See Fig. 86.
Z1000/2	Front floor console. See Fig. 86.