Mercedes-Benz S550 2009 - 2010 MERCEDES-BENZ S400, S550, S600, S63 AMG & S65 AMG

Mercedes-Benz S550 2009 - BUZZERS, RELAYS & TIMERS

Mercedes-Benz S550 2009 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
AIR Pump Relay (N10/1ka)	Front SAM control module with fuse & relay module. See Fig. 9.
Air Suspension Compressor Relay (B)	Front SAM control module with fuse & relay module. See Fig. 183.
Cigar Lighter Relay (R)	Rear SAM control module with fuse & relay module. See Fig. 178.
Circuit 15 Relay (N10/1kD) (D)	Front SAM control module with fuse & relay module. See Fig. 183.
Circuit 15 Relay (N10/2kM) (M)	Rear SAM control module with fuse & relay module. See Fig. 178.
Circuit 15R Relay (N10/1kG) (G)	Front SAM control module with fuse & relay module. See Fig. 183.
Circuit 15R Relay (N10/2kN) (N)	Rear SAM control module with fuse & relay module. See Fig. 178.
Circuit 50 Relay, Starter (H)	Front SAM control module with fuse & relay module. See Fig. 183.
Circuit 15 Relay, Starter (J)	Front SAM control module with fuse & relay module. See Fig. 183.
Terminal 87 Relay, Chassis (N10/1kE) (R)	Front SAM control module with fuse & relay module. See Fig. 183.
Terminal 87 Relay, Engine (C)	Front SAM control module with fuse & relay module. See Fig. 183.
Fanfare Horn Relay (F)	Front SAM control module with fuse & relay module. See Fig. 183.
Fuel Pump Relay (S)	Rear SAM control module with fuse & relay module. See Fig. 178.
Circulation Pump Relay (Q)	Rear SAM control module with fuse & relay module. See Fig. 178.
Quiescent Current Cutout Relay (F32/4k2)	Interior prefuse box. SeeFig. 189
Power Outlet Relay (O)	Rear SAM control module with fuse & relay module. See Fig. 178.
Heated Rear Window Defroster Relay (N10/2kP) (P)	Rear SAM control module with fuse & relay module. See Fig. 178.
Vacuum Pump Relay (K109) (K109/1)	Left front engine compartment.SeeFig. 190
Wiper Park Heater Relay (K)	Front SAM control module with fuse & relay module. See Fig. 183.

Mercedes-Benz S550 2009 - CIRCUIT PROTECTION DEVICES

Mercedes-Benz S550 2009 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Engine Compartment Prefuse Box (2009-10)	Right rear engine compartment. See Fig. 164.
Front Prefuse (2007-08)	Right rear of engine compartment. See Fig. 56.
Front SAM Control Module With Fuse & Relay Module	Left rear engine compartment. See Fig. 183.
Interior Prefuse Box (2009-10)	Right front footwell. See Fig. 163.
Left Instrument Panel Fuse Box	Under left side dash cover. See Fig. 55.
Rear SAM Control Module With Fuse & Relay Module	Center trunk. See Fig. 178
Right Instrument Panel Fuse Box	Under right side dash cover. See Fig. 54.

Mercedes-Benz S550 2009 - CONTROL UNITS

Mercedes-Benz S550 2009 CONTROL UNITS LOCATION

Component	Location
AAC (KLA) Control Unit (N22/1)	Center dash. See Fig. 177.
ABC Control Module (N51/2)	Right front upper footwell. See Fig. 191.
AIRmatic W/ADS Control Module (N51)	Right Front Footwell. SeeFig. 192.
Battery Management System Control Unit (N82/2)	Right rear engine compartment. See Fig. 188.
Central Gateway Control Module (N93)	Left front upper footwell. See Fig. 73.
DC/DC Converter Control Module (N83/1)	Right front wheelhouse. See Fig. 187.
Door Control Module (N69/1)	Left front door. See Fig. 193
Door Control Module (N69/2)	Right front door. See Fig. 195
Door Control Module (N69/3)	Left rear door. See Fig. 194
Door Control Module (N69/4)	Right rear door. See Fig. 196
DTR Control Unit (A89)	Engine compartment, front grill See Fig. 197
ECI Ignition Module (Left Bank) (N92/2)	Top front of left cylinder bank. See Fig. 4.
ECI Ignition Module (Right Bank) (N92/1)	Top front of right cylinder bank. See Fig. 4.
ECI Ignition System Mains Unit (N91)	Top center of engine. See Fig. 4.
Electric Parking Brake Control Unit (A13)	Left rear wheelwell. See Fig. 50.
Emergency Call System Control Unit (N123/4)	Left front of trunk. See Fig. 76.
Engine Control Module (ME-SFI) (N3/10)	Engine, center. see Fig. 198
ESP Control Module (N47/5)	Right front engine compartment. See Fig. 176.
ETC (EGS) Control Module (N15/3)	Right front footwell. See Fig. 180.
Fuel Pump Control Module (N118)	Under left rear seat. See Fig. 75.
Intelligent Servo Module For DIRECT SELECT (A80)	Transmission housing. seeFig. 199
Keyless Go Control Module (N69/5)	Right rear trunk. (early version). See Fig. 179.
Left rear trunk. (later version) See Fig. 200
Left Front Seat Control Module (N32/1)	Interior, under left front seat. See.Fig. 204
Right Front Seat Control Module (N32/2)	Under right front seat. SeeFig. 204
Night Vision Assist Control Unit (N101)	Left front footwell. See Fig. 74.
Overhead Control Panel Control Module (N70)	Center front of roof. See.Fig. 201
Panoramic Sliding Roof Control Module (A98)	Interior roof, front center. see Fig. 203
Pneumatic Suspension With ADS Control Module (N51)	Interior, right front footwell. seeFig. 202
Power Electronics Control Unit (N129/1)	Right side undercarriage. See Fig. 186.
PTS Control Module (N62)	Right side trunk. See Fig. 182.
Radar Sensor Control Unit (SGR) (N62/1)	Right side of trunk. See Fig. 67.
Rear A/C Control Module (N22/4)	In rear of center console. SeeFig. 205
Multi-Contour Backrest Control Module (N32/20)	(Left rear) Trunk, Left Front. see Fig. 206
Multi-Contour Backrest Control Module (N32/21)	(Right rear) Trunk, Left Front. see.Fig. 207
Rear SAM Control Unit (N10/2)	Trunk, center front. See Fig. 178.
Regenerative Braking System Control Unit (N30/6)	Right front engine compartment. See Fig. 165.
Restraint Systems Control Module (N2/7)	Front of center console. See Fig. 65.
Reverse Camera Control Module (N66/2)	Left side of trunk. See Fig. 68.
Front SAM Control Module (N10/1)	Engine compartment, left rear. See. Fig. 183
SDAR Control Unit (N87/5)	Left side of trunk. See Fig. 71.
Steering Column Module (N80)	Cockpit. See.Fig. 208
TLC (HDS) Control Module (N121)	Right rear trunk. (Early version) See Fig. 181.
Right rear trunk. (Later version) See Fig. 209
TPM Control Module (N88)	Right front footwell. See Fig. 72.
Traction System Hydraulic Unit (A7/3)	Left front of engine compartment. See Fig. 210
Trailer Recognition Control Unit (N28/1)	Right rear of luggage compartment. See.Fig. 211
Transmission Oil Auxiliary Pump Control Unit (N89)	Transmission housing. See Fig. 184.
Vehicle Power Supply Control Unit (N82/1)	Right front of trunk. See Fig. 70.
Voice Control System (VCS [SBS]) Control Unit (N41/3)	Left side of trunk. See Fig. 66.
WSS Control Unit (Weight Sensing System) (N2/13)	Interior, under right front seat. SeeFig. 213

Mercedes-Benz S550 2009 - MOTORS

Mercedes-Benz S550 2009 MOTORS LOCATION

Component	Location
Air Suspension Compressor Unit (A9/1)	Under right front of vehicle. SeeFig. 212
Backrest angle adjustment motor (Left Front Seat) (M27/5)	In left front seat, inside backrest. See.Fig. 215
Backrest angle adjustment Motor (Right Front Seat) (M28/5)	In right front seat, inside backrest. See.Fig. 215
Front Blower Motor (A32m1)	Interior, right front passenger footwell. See Fig. 214
Electric Air Pump (273) (M33)	Top front center of engine. See Fig. 1.
Electric Air Pump (275) (M33)	Right front of engine. See Fig. 7.
Electric Refrigerant Compressor (A9/5)	Left front engine. See Fig. 185.
Electrohydraulic Power Steering (A91/1)	Right, behind front bumper. See Fig. 216
Coolant Circulation Pump (M13)	Engine compartment, left rear. See Fig. 217
Fore/Aft adjustment motor (Left Front Seat) (M27/1)	Under left front seat. See Fig. 215
Fore/Aft adjustment motor (Right Front Seat) (M28/1)	Under right front seat. See.Fig. 215
Front seat height adjustment (Left Front Seat) (M27/10)	Under left front seat. See Fig. 215
Front seat height adjustment (Right Front Seat) (M28/10)	Under right front seat. See Fig. 215
Fuel Pump (Left) (M3)	Inside tank. See Fig. 218
HCS Pump (M5/2)	Left front wheelwell. See Fig. 59.
Head Restraint Raise/Lower Motor (Left Front Seat) (M27/4)	In left front seat back. See Fig. 215
Head Restraint Raise/Lower Motor (Right Front Seat) (M28/4)	In right front seat back. See.Fig. 215
Upper left Blending Air Flap Actuator Motor (M2/30)	Left side of HVAC unit. See Fig. 214
Lower left Blending Air Flap Actuator Motor (M2/31)	Left side of HVAC unit. See Fig. 214
Left rear footwell flap actuator motor (M16/19)	Center console, rear. See.Fig. 229
Right rear footwell flap actuator motor (M16/20)	Center console, rear. See.Fig. 230
Left rear blending air flap actuator motor (M16/30)	Interior, right front upper footwell. See.Fig. 231
Right rear blending air flap actuator motor (M16/31)	Interior, right front upper footwell. See.Fig. 232
Left "B" Pillar Air Distribution Actuator Motor (M16/33)	Left front seat. See Fig. 171.
Right "B" Pillar Air Distribution Actuator Motor (M16/34)	Right front seat. See Fig. 170.
Left Side Outlet Flap Actuator Motor (M2/17)	Dashboard, Left front. See Fig. 214
Left Center Air Flap Actuator Motor (M2/12)	Dashboard, center. See Fig. 214
Left Defroster Vent Flap Actuator Motor (M2/8)	Dashboard, center. See Fig. 214
Left Footwell Flap Actuator Motor (M2/10)	Center console, front. See Fig. 214
Left Headlamp Range Adjustment motor (E1m1)	Exterior, left front inside left headlamp unit. See.Fig. 219
Multicontour Seat Pneumatic Pump (M40)	Trunk, Left front, SeeFig. 220
Power Window Motor (Front Left/Right) (M10/3 & M10/4)	In respective front doors. See Fig. 221
Power Window Motor (Rear Left/Right) (M10/5 & M10/6)	In respective rear doors. See Fig. 221
Rear Blower Motor (M2/1)	Center console, between front seats. SeeFig. 222
Left Front Seat Cushion Inclination Motor (M27/9)	Under left front seat.Fig. 215
Right Front Seat Cushion Inclination Motor (M28/9)	Under right front seat.Fig. 215
Rear Window Sun Shade Motor (M24)	Under center of rear window shelf. See Fig. 64.
Fresh Air/Air Recirculation Flaps Actuator Motor (M2/5)	Dashboard, Right. See Fig. 214
Upper Right Blending Air Flap Actuator Motor (M2/32)	Interior, right front upper footwell. See Fig. 214
Lower Right Blending Air Flap Actuator Motor (M2/33)	Interior, right front upper footwell. See Fig. 214
Right Side Outlet Flap Actuator Motor (M2/18)	Dashboard, right front. See.Fig. 214
Right Center Air Outlet Flap Actuator Motor (M2/13)	Center console, front. See.Fig. 214
Right Defroster Vent Flap Actuator Motor (M2/9)	Dashboard, center. See.Fig. 214
Right Footwell Flap Actuator Motor (M2/11)	Center Console, front. See. Fig. 214
Right Headlamp Range Adjustment Motor (E2m1)	Exterior, right front inside right headlamp. See Fig. 223
Left rear head restraint inclination adjustment motor (M18/15)	Interior, behind left rear seat. See Fig. 224
Right rear head restraint inclination adjustment motor (M18/16)	Interior, behind right rear seat. See Fig. 224
Left Rear Seat Fore/Aft Adjustment Motor (M18/17)	Under left rear seat. See Fig. 224
Right Rear Seat Fore/Aft Adjustment Motor (M18/18)	Under right rear seat. See Fig. 224
Left rear seat cushion inclination adjustment motor (M18/19)	Under left rear seat. See Fig. 224
Right rear seat cushion inclination adjustment motor (M18/20)	Under right rear seat. See Fig. 224
Seat Cushion Fore/Aft Motor (Left Front Seat) (M27/8)	Under left front seat. See Fig. 215
Seat Cushion Fore/Aft Motor (Right Front Seat) (M28/8)	Under right front seat. See Fig. 215
Slave Wiper Motor (M6/7)	Center rear of engine compartment. See Fig. 61.
Roof Drive Assembly (M12)	Interior roof, left front. SeeFig. 225
Steering Column (in/out) Motor (M20/1)	Right side on steering column. See Fig. 62.
Steering Column (up/down) Motor (M20/2)	Left side on steering column. See Fig. 63.
Throttle Valve Actuator (273) (M16/6)	Engine, center rear. See.Fig. 226
Throttle Valve Actuator (275) (M16/6)	Center rear of engine. See.Fig. 227
Windshield Washer Fluid Pump (M5/1)	Left front wheel house. See.Fig. 228
Wiper Motor (M6/6)	Left rear of engine compartment. See Fig. 60.

Mercedes-Benz S550 2009 - SENDING UNITS & SENSORS

Mercedes-Benz S550 2009 SENDING UNITS & SENSORS LOCATION

Component	Location
AAC Multifunction Sensor (B31/1)	Right rear of engine compartment. See Fig. 53.
ABC Lateral Acceleration Sensor (B24/12)	Under left front of sear. See Fig. 233
Left rear level Sensor (B22/7)	Left rear wheelhouse. See.Fig. 241
Left front level Sensor (B22/8)	Left front wheelhouse. See.Fig. 242
Right front level Sensor (B22/9)	Right front wheelhouse. See.Fig. 243
Right rear level Sensor (B22/10)	Right rear wheelhouse. See.Fig. 244
Left front body lateral acceleration sensor (B24/3)	Engine compartment, left. See.Fig. 245
Right front body lateral acceleration sensor (B24/4)	Engine compartment, right. See.Fig. 246
Right rear body lateral acceleration sensor (B24/6)	Hatshelf, right. See.Fig. 247
ABC Pressure Sensor (B4/5)	Front bumper, left behind bumper. See Fig. 234
Left Front ABC Pressure Sensor (B4/8)	Front bumper, left behind bumper. SeeFig. 237
Right Front ABC Pressure Sensor (B4/9)	Front bumper, left behind bumper. SeeFig. 238
Left Rear ABC Pressure Sensor (B4/10)	Left rear wheelhouse. SeeFig. 239
Right Rear ABC Pressure Sensor (B4/11)	Left rear wheelhouse. SeeFig. 240
Accelerator Pedal Sensor (B37)	Interior, left front footwell. See.Fig. 235
AIRmatic Pressure Sensor (B7)	Right front Wheelhouse. See Fig. 236
Ambient Temperature Display Temperature Sensor (B14)	left side of front bumper. SeeFig. 248
Brake Pad Contact Sensor (Right Front) (S10/2)	Right Front Wheelhouse. See Fig. 249
Brake Pad Contact Sensor (Right Rear) (S10/4)	Right rear wheelhouse. See Fig. 250
Camshaft Hall Sensor (Left Bank) (275) (B6/2)	Rear of left valve cover. See Fig. 6.
Camshaft Hall Sensor (Right Bank) (275) (B6/3)	Rear of right valve cover. See Fig. 6.
Camshaft Hall Sensor (273) (B6/1)	Right front side of engine. See Fig. 1.
Charge Air Temperature Sensor (275) (B17/8)	On top front of engine. See Fig. 52.
Coolant Temperature Sensor (273) (B11/4)	Engine, left rear. See.Fig. 255
Coolant Temperature Sensor (156) (B11/4)	Engine, right front. See Fig. 253
Coolant Temperature Sensor (275) (B11/4)	Top front of engine. See.Fig. 254
Crankshaft Hall Sensor (B70)	Left rear of engine. See Fig. 32.
Crankshaft Position Sensor (273) (L5)	Left rear of engine block. See Fig. 1.
Crankshaft Position Sensor (275) (L5)	Top rear of engine. See Fig. 5.
Driver-Side Frontal Acceleration Sensor (B48/1)	Left front of engine compartment. See Fig. 251
DTR Radar Sensor (A89/b1)	Engine compartment, front center. See Fig. 252
Brake Pressure Sensor (B34)	Engine compartment, left rear. See Fig. 257
Evaporator Temperature Sensor (B10/6)	Right of steering column, under dash. See Fig. 51.
Left Front Knock Sensor (Engine 275) (A29/1)	On front left side of engine. See Fig. 256
Right Front Knock Sensor (Engine 275) (A30/1)	On right front side of engine. See Fig. 256
Front Short Range Radar Sensor Unit (A86/1)	Front bumper. See Fig. 168.
Fuel Level Sensor (Left) (B4/1)	In fuel tank. See Fig. 41.
Fuel Level Sensor (Right) (B4/2)	In fuel tank. See Fig. 41.
Fuel Pressure Sensor (Engine) (B4/15)	Top left side of engine. See Fig. 34.
Fuel Pressure Sensor (Fuel Filter) (B4/7)	Under left rear seat of vehicle. See Fig. 258
Fuel Tank Pressure Sensor (B4/3)	In fuel tank. See Fig. 41.
Hot Film MAF Sensor (B2/6 Left) (156)	In air intake manifolds. See Fig. 33.
Hot Film MAF Sensor (B2/7 Right) (156)	In air intake manifolds. See Fig. 33.
Hot Film MAF Sensor (273) (B2/5)	Center rear of engine. See Fig. 259
Intake Air Temperature Sensor (156) (B17)	Rear center of engine. See Fig. 31.
Pressure Sensor (156) (B28)	Top front of engine. See Fig. 30.
Pressure Sensor (273) (B28)	Engine. See Fig. 260
Ultrasonic echo sounder sensor (A26/13)	In rear dome. See.Fig. 261
Left Airbag & Left Window Airbag Sensor (A53/1)	Under left rear seat.Fig. 262
Left Exhaust Camshaft Hall Sensor (B6/6)	Front of left cylinder bank. See Fig. 28.
Left Intake Camshaft Hall Sensor (B6/4)	Front of left cylinder bank. See Fig. 28.
Left Knock Sensor 2 (156) (A16/2)	Left side of engine. See Fig. 29.
Left Knock Sensor 2 (273) (A16/2)	Under intake manifold. See Fig. 2.
Left O2 Sensor (After TWC) (G3/5)	Under center front of vehicle. See Fig. 263
Left O2 Sensor (Before TWC) (G3/3)	underbody, center front. SeeFig. 264
Left Rear A/C Heat Exchanger Temperature Sensor (B10/9)	center console, between front seats Fig. 265
BAS Diaphragm Travel Sensor (A7/7b1)	Left rear of engine compartment. See Fig. 257
Oil Sensor (Level, Temperature, Quality) (273) (B40)	Lower right front of engine. See Fig. 267
Oil Sensor (Level, Temperature, Quality) (275) (B40)	Bottom of oil pan. See Fig. 266.
Oil Temperature Sensor (B1) (156)	Left front behind AC compressor. See Fig. 39.
Front WSS (Weight Sensing System) Sensors	(left Front) (B48/11) Front Passenger Seat. See.Fig. 268
(Right Front) (B48/12) Front Passenger Seat. See.Fig. 268
(Left Rear) (B48/13) Front Passenger Seat. See.Fig. 268
(Right Rear) (B48/14) Front Passenger Seat. See.Fig. 268
Passenger-Side Frontal Acceleration Sensor (B48/2)	Right front of engine compartment. See Fig. 269
Rear PTS Ultrasonic Sensors (Rear Bumper)	(Outer Right) (B8/7) SeeFig. 270
(Inner Right) (B8/8) SeeFig. 270
(Inner Left) (B8/9) SeeFig. 270
(Outer Left) (B8/10) SeeFig. 270
Rear A/C Evaporator Temperature Sensor (B10/11)	Center console, between front seats. SeeFig. 271
Left Rear Knock Sensor (Engine 275) (A29/2)	On rear left side of engine. See Fig. 256
Right Rear Knock Sensor (Engine 275) (A30/2)	On right rear side of engine. See Fig. 256
Rear Short Range Radar Sensor Unit (A86/2)	Rear bumper. See Fig. 167.
Refrigerant Pressure Sensor (B12)	Left front wheelhouse. See Fig. 169.
Right Airbag & Right Window Airbag Sensor (A54/1)	Under right rear seat. SeeFig. 262
Right Exhaust Camshaft Hall Sensor (B6/7)	Front of right cylinder bank. See Fig. 28.
Right Rear A/C Heat Exchanger Temperature Sensor (B10/10)	In center console, between front seats. SeeFig. 265
Right Intake Camshaft Hall Sensor (B6/5)	Front of right cylinder bank. See Fig. 28.
Right Knock Sensor 1 (156) (A16/1)	Right side of engine. See Fig. 29.
Right Knock Sensor 1 (273) (A16/1)	Under intake manifold. SeeFig. 273
Right O2 Sensor (After TWC) (G3/6)	Underbody, center front. SeeFig. 275
Right O2 Sensor (Before TWC) (G3/4)	Underbody, center front. SeeFig. 274
Steering Angle Sensor (N49)	On steering column. See Fig. 272
Wheel Speed Sensors	(Left Front) (L6/1) See.Fig. 272
(Right Front) (L6/2) See.Fig. 272
(Left Rear) (L6/3) See.Fig. 272
(Right Rear) (L6/4) See.Fig. 272
Yaw Rate, Lateral & Longitudinal Acceleration Sensor (B24/15)	Front center trunk. See Fig. 175.

Mercedes-Benz S550 2009 - SOLENOIDS & SOLENOID VALVES

Mercedes-Benz S550 2009 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
ABC Front Axle Valve Unit (Y36/1)	Behind front Bumper, Left. See Fig. 276
ABC Rear Axle Valve Unit (Y36/2)	Left rear wheelhouse. See.Fig. 276
ABC Suction Restrictor Valve (Y86/1)	Left front of engine compartment. See.Fig. 276
Activated Charcoal Canister Shutoff Valve (Y58/4)	Under right rear of vehicle. See Fig. 41.
Air Pump Switchover Valve (275) (Y32)	Engine, left rear. See.Fig. 277
Air Pump Switchover Valve (156) (Y32)	Top front of engine. See Fig. 36.
Air Pump Switchover Valve (273) (Y32)	Right front of engine. See Fig. 278
Air Shutoff Valve (Left 126/1, Right 126/2) (156)	Top front of engine. See Fig. 37.
BAS Solenoid (A7/7y1)	On BAS brake booster. See.Fig. 279
Divert Air Switch-Over Valve (275) (Y101)	Right rear, engine SeeFig. 280
Fuel Injectors (156) (Y62y1 - Y62y8)	Top of engine, above each cylinder. See Fig. 27.
Fuel Injectors (273) (Y62)	Top of engine, above each cylinder. See Fig. 281
Fuel Injectors (275) (Y62y1 - Y62y12)	Top of engine, above each cylinder. See Fig. 282
Heating System Shutoff Valve (Y16/2)	(273) Engine, left rear. SeeFig. 283
(156) Engine, right rear. See Fig. 40.
Left Exhaust Camshaft Solenoid (Y49/6)	Front of left cylinder bank. See Fig. 26.
Left Front Axle Damping Valve Unit (Y51)	Left front wheelhouse. SeeFig. 284
Left Front Seat Belt Comfort Solenoid (K18/4)	Base of left "B" pillar. SeeFig. 285
Left Intake Camshaft Solenoid (Y49/4)	Front of left cylinder bank. See Fig. 26.
Left Rear Axle Damping Valve Unit (Y53)	Left rear wheelhouse. SeeFig. 286
Left Rear Seat Belt Comfort Feature Solenoid (K18/6)	Interior, left C-pillar. SeeFig. 287
AIRmatic Valve Unit (Y36/6)	Right front wheelhouse. SeeFig. 288
Purge Control Valve (Y58/1)	(275) Left front of engine compartment. SeeFig. 290
(273) Left front of engine compartment. SeeFig. 289
Rear Refrigerant Shut-Off Valve (Y67)	Left front wheelhouse. SeeFig. 291
Right Exhaust Camshaft Solenoid (Y49/7)	Front of right cylinder bank. See Fig. 26.
Right Front Axle Damping Valve Unit (Y52)	Right front wheelhouse. SeeFig. 292
Right Intake Camshaft Solenoid (Y49/5)	Front of right cylinder bank. See Fig. 26.
Right Rear Axle Damping Valve Unit (Y54)	Right rear wheelhouse. See Fig. 14.
Secondary Air Injection Shutoff Valve (Left) (126/1)	Front of left cylinder bank. See Fig. 7.
Secondary Air Injection Shutoff Valve (Right) (126/2)	Front of right cylinder bank. See Fig. 7.
SPS (PML) Solenoid Valve (Y10)	Underbody, front center. See.Fig. 293
Variable Intake Manifold Switchover Valve (156) (Y22/6)	Top front of engine. See Fig. 35.
Variable Intake Manifold Switchover Valve (273) (Y22/6)	Engine, front. See.Fig. 294

Mercedes-Benz S550 2009 - SWITCHES

Mercedes-Benz S550 2009 SWITCHES LOCATION

Component	Location
Brake Fluid Indicator Switch (S11)	Left rear of engine compartment. See Fig. 77.
Coolant level Indicator Switch (S41)	Right front of engine compartment. SeeFig. 295
Windshield Washer Fluid Level Indicator Switch (S42)	Left front wheelhouse. SeeFig. 296
Hood Open/Closed Switch (ATA) (S62)	Right front of engine compartment. See Fig. 297
Left Front Rotary Tumbler switch (A85/s1)	Inside left front door lock unit, not visible. SeeFig. 298
Left Front Drive Lock Pawl Switch (A85/s2)	Inside left front door lock unit, not visible. See.Fig. 298
Left Front Safety Limit Switch (A85/s3)	Inside left front door lock unit, not visible. SeeFig. 298
Right Front Rotary Tumbler switch (A85/1s1)	Inside right front door lock unit, not visible. SeeFig. 299
Right Front Drive Lock Pawl Switch (A85/1s2)	Inside right front door lock unit, not visible. See.Fig. 299
Right Front Safety Limit Switch (A85/1s3)	Inside right front door lock unit, not visible. SeeFig. 299
Left Rear Seat Belt Buckle Switch (S68/11)	In left rear seat belt buckle. SeeFig. 302
Parking Brake Switch (S76/15)	Dashboard, left side. See.Fig. 303
Left Rear Rotary Tumbler switch (A85/3s1)	Inside left rear door lock unit, not visible. SeeFig. 300
Left Rear Drive Lock Pawl Switch (A85/3s2)	Inside left rear door lock unit, not visible. See.Fig. 300
Left Rear Safety Limit Switch (A85/3s3)	Inside left rear door lock unit, not visible. SeeFig. 300
Right Rear Rotary Tumbler switch (A85/4s1)	Inside right rear door lock unit, not visible. SeeFig. 301
Right Rear Drive Lock Pawl Switch (A85/4s2)	Inside right rear door lock unit, not visible. See.Fig. 301
Right Rear Safety Limit Switch (A85/4s3)	Inside right rear door lock unit, not visible. SeeFig. 301
Right Rear Seat Belt Buckle Switch (S68/12)	Interior, right rear seat. SeeFig. 304
Stop Lamp Switch (S9/1)	Top of brake pedal assembly. SeeFig. 305
Steering Column Adjustment Raise/Lower, Forward/Back Switch (S59/1s1)	Cockpit, part of steering column module. SeeFig. 306
Trunk Lid Gearing Microswitch (M14/7s1)	Rear of trunk lid, latch. SeeFig. 307
Trunk Lid Lock Pawl Microswitch (M14/7s2)	Rear of trunk lid, latch. SeeFig. 307
Trunk Lid Rotary Tumbler Microswitch (M14/7s3)	Rear of trunk lid, latch. SeeFig. 307

Mercedes-Benz S550 2009 - MISCELLANEOUS

Mercedes-Benz S550 2009 MISCELLANEOUS LOCATION

Component	Location
Alarm Siren W/Auxiliary Battery (H3/1)	Left front wheelhouse. SeeFig. 308
Backup Camera Voltage Supply Module (N66/10)	Left side of trunk. See Fig. 69
On-Board Electrical System Battery (G1)	Right side of trunk. See Fig. 57
Battery Starter (G1/4)	Right rear of engine compartment. See Fig. 58
Central TPM (RDK) Antenna (A2/97)	Under center of vehicle. See Fig. 49.
CTEL/GPS Roof Antenna (A2/49)	Rear center of roof. See Fig. 44.
Cylinder 1- 8 Ignition Coils (273) (T1/1 - T1/8)	Top right side of engine. See Fig. 309
Cylinder 1 - 8 Ignition Coils (156) (T1/1 - T1/8)	Top of respective cylinders. See Fig. 38.
Data Link Connector (X11/4)	Interior, left front upper footwell. SeeFig. 310
Driver ETR Squib (R12/1)	Bottom of left "B" pillar. SeeFig. 311
Emergency Call/SDAR Antenna (A2/52)	On rear deck lid. See Fig. 46.
Emergency Call System Backup Antenna (A2/54)	Left or right of trunk respectively. See Fig. 47.
Fanfare Horns	(H2) (Left) Behind front bumper. SeeFig. 312
(H2/1) (Right) Behind front bumper. SeeFig. 312
Left Front TPM (RDK) Wheel Antenna (A2/44)	left front wheelwell. See Fig. 45.
Right Front TPM (RDK) Wheel Antenna (A2/45)	Right front wheelwell. SeeFig. 313
Generator (Engine 275) (G2)	On right front of engine. SeeFig. 314
Interior Keyless Go Antenna (A2/61)	Interior, Center rear. See Fig. 48.
Center Console Keyless Go Antenna (A2/60)	Center Console, between front seats. SeeFig. 315
Keyless Go Trunk Antenna (A2/35)	Trunk, center front. See Fig. 315
Keyless Go Antenna (Rear Doors) (A2/39 & A2/41)	In respective rear doors. SeeFig. 315
Left Front Keyless Go Sensor Unit (B67/1)	In left front door. SeeFig. 315
Left Rear Keyless Go Sensor Unit (B67/3)	In left Rear door. SeeFig. 315
Left Rear Window Airbag Ignition Squib (R12/22)	Interior, Left "C" pillar. SeeFig. 316
Left Rear ETR Ignition Squib (R12/6)	Interior, Left "C" pillar. SeeFig. 317
Front Passenger (GUS) Squib (R12/2)	Bottom of right "B" pillar. SeeFig. 311
Front Passenger Buckle ETR Squib (R46/1)	Right Front Seat. SeeFig. 318
Driver Airbag Ignition Squib 1 (R12/13)	Cockpit, inside steering wheel. SeeFig. 323
Driver Airbag Ignition Squib 2 (R12/14)	Cockpit, inside steering wheel. SeeFig. 324
Front Passenger Airbag Ignition Squib 1 (R12/4)	Right side of dash. SeeFig. 319
Front Passenger Airbag Ignition Squib 2 (R12/5)	Right side of dash. SeeFig. 320
Left Front Side Airbag Ignition Squib (R12/20)	Left front seat, inside backrest. SeeFig. 321
Right Front Side Airbag Ignition Squib (R12/21)	Right front seat, inside backrest. SeeFig. 322
Right Front Keyless Go Sensor Unit (B67/2)	In right front door. See.Fig. 315
Right Rear Keyless Go Sensor Unit (B67/4)	In right rear door. See.Fig. 315
Right Rear Window Airbag Ignition Squib (R12/23)	Interior, Right "C" pillar. SeeFig. 325
Right Rear ETR Ignition Squib (R12/7)	Interior, Right "C" pillar. SeeFig. 326
Sound Amplifier (A2/13)	Left side of luggage compartment. SeeFig. 327
Rear Window Antenna Amplifier Module (A2/12)	Interior roof, rear center. SeeFig. 328

Mercedes-Benz S550 2009 - CONNECTORS

Mercedes-Benz S550 2009 CONNECTORS LOCATION

Component	Location
Roof Antenna Connector (X1/16) (Black, 2 Pin)	Left hatshelf. See Fig. 106.
Cockpit Wiring Harness And FFS [RBA] Connector (X18) (Grey, 14 Pin)	right front footwell. See Fig. 107.
Tele Aid Digital Crash Input Connector (X28/24) (White, 2 Pin)	Left front footwell. See Fig. 108.
Left Front Door And FFS [RBA] Connector (X35/1x1) (White, 4 Pin)	Left front door. See Fig. 109.
Left Front Door And FFS [RBA] Connector (X35/1x2) (Blue, 2 Pin)	Left front door. See Fig. 110.
Left Front Door And FFS [RBA] Connector (X35/1x3) (Blue, 2 Pin)	Left front door. See Fig. 111.
Left Front Door And FFS [RBA] Connector (X35/1x4) (Yellow, 2 Pin)	Left front door. See Fig. 112.
Right Front Door And FFS [RBA] Connector (X35/2x1) (Blue, 2 Pin)	Right front door. See Fig. 113.
Right Front Door And FFS [RBA] Connector (X35/2x4) (Yellow, 2 Pin)	Right front door. See Fig. 114.
Right Front Door And FFS [RBA] Connector (X35/2x5) (Blue, 4 Pin)	Right front door. See Fig. 115.
CTEL Seperation Point (X39/37) (Blue, 4 Pin)	Center console, between front seats. See Fig. 116.
Breakdown Assistance/Info Button Connector (X39/48) (White, 4 Pin)	Center console, between front seats. SeeFig. 117.
Right Front Axle Multiple Circuit Junction Connector (X62/6) (Black, 5 Pin)	Right front wheelwell. See Fig. 118.
Left Front Axle Multiple Circuit Junction Connector (X62/7) (Black, 5 Pin)	Left front wheelwell. See Fig. 119.

Mercedes-Benz S550 2009 - GROUNDS

Mercedes-Benz S550 2009 GROUNDS LOCATION

Component	Location
Ground (at right headlamp unit) (W2)	Right front wheel housing. See Fig. 22.
Ground (right front wheelhousing) (W3/1)	Right side of engine compartment. See Fig. 78.
Ground (left front wheelhousing) (W3/2)	Left side of engine compartment. See Fig. 79.
Ground (left wheelhousing in trunk) (W6)	Left side of trunk. See Fig. 84.
Ground (right taillamp in trunk) (W7/1)	Trunk, right rear. See Fig. 23.
Ground (starter battery) (W10)	Right rear of engine compartment. See Fig. 24.
Ground (electronics) (275) (W10/1)	Top of engine. See Fig. 25.
Ground (electrical system battery) (W10/4)	Right side of tank. See Fig. 80.
Ground (engine- connection point for ground wires) (156) (W11)	Right front of engine. See Fig. 81.
Ground (engine- connection point for ground wires) (W11w1)	Right rear of engine. See Fig. 86.
Ground (engine- connection point for gound wires) (W11w2)	Left rear of engine. See Fig. 87.
Ground (engine- ground strap) (W11/1)	Left front of engine. See Fig. 82.
Ground (engine- right side) (W11/2)	Right front of engine. See Fig. 83.
Ground (engine- left side) (275) (W11/3)	Left front of engine compartment. See Fig. 85.
Ground (rear window defroster) (W13)	Left "C" pillar. See Fig. 88.
Ground (SBC- right) (W14/3)	Right front engine compartment. See Fig. 89.
Ground (electronics power ground) (W15)	Right front footwell. See Fig. 90.
Ground (right footwell) (W15/1)	Right front footwell. See Fig. 91.
Ground (electronics) (W15/3)	Front of engine. See Fig. 92.
Ground (right rear seat) (W17)	Right rear footwell. See Fig. 93.
Ground (left rear seat) (W17/1)	Left rear footwell. See Fig. 94.
Ground (left front seat crossmember) (W18)	Under left front seat. See Fig. 95.
Ground (right front seat crossmember) (W19)	Under right front seat. See Fig. 96.
Ground (restraint systems control module) (W26)	Under front of center console. See Fig. 97.
Ground (seat, left front sidebag) (W26/1)	Left front seat, inside backrest. See Fig. 98.
Ground (seat, right front sidebag) (W26/2)	Right front seat, inside backrest. See Fig. 99.
Ground (left footwell) (W34)	Left front footwell. See Fig. 100.
Ground (electronics- left footwell) (W34/1)	Left front footwell. See Fig. 101.
Ground (reference, image transmission system) (W43)	Left front footwell. See Fig. 102.
Ground (AIR pump) (275) (W46)	Front of engine. See Fig. 103.
Ground (wheelhousing right rear) (W54)	Right front trunk. See Fig. 104.
Ground (left rear wheelhouse) (W54/3)	Left front trunk. See Fig. 105.

Mercedes-Benz S550 2009 - SPLICES

Mercedes-Benz S550 2009 SPLICES LOCATION

Component	Location
Circuit 15 connector sleeve (Z3)	Interior, left front footwell. See Fig. 120.
Circuit 15 connector sleeve (fused) (PTS) (Z3/19)	Right front trunk. See Fig. 121.
Circuit 30 connector sleeve (Z4/3)	Under right front seat. See Fig. 122.
Circuit 30 connector sleeve (Z4/3z3)	Right rear footwell. See Fig. 123.
Circuit 30 connector sleeve (Z4/3z4)	Under right front seat. See Fig. 124.
Luggage compartment lamp circuit 30 connector sleeve (Z4/6z5)	Right trunk lid. See Fig. 125.
Connector sleeve (solder joint in harness) (M156) (Z5)	Right front of transmission. See Fig. 127.
Connector sleeve (solder joint in harness) (M273) (Z5z2)	Right side of engine. See Fig. 126.
Connector sleeve (solder joint in harness) (Z5z1)	Left front door. See Fig. 128.
Ground connector sleeve (sensor downstream TWC) (Z6/4)	Left rear engine compartment. SeeFig. 120
Sensor supply connector sleeve (273) (Z6/26)	Right side of engine. See Fig. 130.
Sensor ground connector sleeve (156) (Z6/27)	Right front of engine. See Fig. 131.
Circuit 31 connector sleeve (Z6/30)	Dashboard, left side under dash. See Fig. 132.
Circuit 31 connector sleeve (156) (Z6/30z1)	Right front cylinder bank. See Fig. 133.
Circuit 31 connector sleeve (156) (Z6/30z2)	Engine left front. See Fig. 134.
Front axle acceleration sensor ground connector sleeve (Z6/38)	Right front footwell. See Fig. 140.
Ground connector sleeve (156) (Z6/48)	Left rear engine compartment. See Fig. 135.
Ground connector sleeve (Z6/48z1)	Right side of engine. See Fig. 136.
Ground connector sleeve (Z6/48z2)	Left rear of engine. See Fig. 137.
Circuit 31 connector sleeve (Z6/56)	Behind left rear seat. See Fig. 138.
Trunk lid ground connector sleeve (Z6/92)	Right trunk lid. See Fig. 139.
Circuit 87M1e connector sleeve (M156) (Z7/35z1)	Engine, rear. See Fig. 142.
Circuit 87M1e connector sleeve (M273) (Z7/35z1)	Right side of engine. See Fig. 141.
Circuit 87M1e connector sleeve (M156) (Z7/35z2)	Right rear of engine. See Fig. 144.
Circuit 87M1e connector sleeve (M273) (Z7/35z2)	Left rear of engine. See Fig. 143.
Circuit 87M1e connector sleeve (M156) (Z7/35z3)	Left rear of engine. See Fig. 145.
Circuit 87M1e connector sleeve (M156) (Z7/35z4)	Right rear of engine. See Fig. 146.
Circuit 87M2e connector sleeve (M156) (Z7/36)	Rear of engine. See Fig. 147.
Circuit 87M2e connector sleeve (Z7/36z1)	Right side of engine. See Fig. 148.
Circuit 87M2e connector sleeve (Z7/36z2)	Left side of engine. See Fig. 149.
Circuit 87 M1i connector sleeve (Z7/38)	Rear of engine. See Fig. 150.
Circuit 87 M1i connector sleeve (Z7/38z1)	Right of engine. See Fig. 151.
Circuit 87 M1i connector sleeve (Z7/38z2)	Rear of engine. See Fig. 152.
Circuit 87 M2i connector sleeve (275) (Z7/39)	Rear of engine. See Fig. 153.
Sensor ground connector sleeve (Z7/43)	Right side of engine. See Fig. 154.
Sensor ground connector sleeve (275) (Z7/43z1)	Right rear of engine. See Fig. 155.
Sensor ground connector sleeve (275) (Z7/43z2)	Right rear of engine. See Fig. 156.
Sensor ground connector sleeve (Z7/44)	Rear of engine. See Fig. 157.
Front axle acceleration sensor connector sleeve (Z7/51)	Interior, right front footwell. See Fig. 158.
5V output 2 connector sleeve (156) (Z7/61)	Left rear of engine compartment. See Fig. 159.
Circuit 87 M3e connector sleeve (156) (Z7/98z1)	Right rear cylinder bank. See Fig. 160.
Circuit 87 M3e connector sleeve (156) (Z7/98z2)	Left rear engine. See Fig. 161.
Circuit 87 M3e connector sleeve (156) (Z7/98z3)	Left rear engine compartment. See Fig. 162.
Rear PTS sensor voltage supply connector sleeve (Z36/2)	Right side rear bumper. See Fig. 174.
Front PTS sensor voltage supply connector sleeve (Z36/4)	Center front bumper. See Fig. 173.
AC LIN bus data connector sleeve (Z68/3)	Dashboard, center inside wiring harness. See Fig. 132.
OBD LIN bus ground connector sleeve (Z68/10)	Dashboard, center inside wiring harness. See Fig. 132.
OBD LIN bus positive connector sleeve (Z68/11)	Dashboard, center inside wiring harness. See Fig. 132.
OBD LIN data connector sleeve (Z68/12)	Dashboard, center inside wiring harness. See Fig. 132.
Circuit 58d in FSS [RBA] connector sleeve (Z81/4)	Under left front seat. See Fig. 172.
Circuit 58d COC connector sleeve (Z81/5)	Dashboard, center inside wiring harness. SeeFig. 132.
Front passenger circuit 58d connector sleeve (Z81/11)	Dashboard, center inside wiring harness. SeeFig. 132.
AC bus solder terminal (Z110/1)	Left rear engine compartment. See Fig. 120.
AC bus solder terminal (Z110/3)	Left rear engine compartment. See Fig. 120.
AC 12V solder terminal (Z111/1)	Left rear engine compartment. See Fig. 120.