Mercedes-Benz 560SEL 1990 - ELECTRICAL COMPONENT LOCATOR 1988-90 ELECTRIC COMPONENT LOCATOR Mercedes-Benz

Mercedes-Benz 560SEL 1990 - BUZZERS, RELAYS & TIMERS

Mercedes-Benz 560SEL 1990 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C Compressor Delay Relay	In fuse/relay block.
Air Injection Mgmt. Relay	In fuse/relay block.
Antenna Motor Relay	At left rear wheelwell, in motor housing.
Auxiliary Fan High-Speed Relay	On center of firewall. See Fig. 1.
Auxiliary Fan Low-Speed Relay	On center of firewall. See Fig. 1.
Dome Light Delay Relay	In front dome light assembly.
Fuel Pump Relay	On left rear side of engine compartment. See Fig. 2.
Overvoltage Protection Relay
ABS System	On left side of firewall. See Fig. 1.
CIS-E Fuel Injection	On left rear side of engine compartment. See Fig. 3.
Oxygen Sensor Protection Relay	In fuse/relay block.
Power Seat Control Relays	In fuse/relay block.
Power Window Relay	In fuse/relay block.
Rear Defogger Time Relay	In fuse/relay block.
Seat Belt Warning Relay	On left side of driver's footwell.
Seat Heater Relays	Under front seats, on air duct.
Turn Signal/Hazard Flasher Relay	Behind instrument cluster.
Wiper Interval Control Relay	In fuse/relay block.

Mercedes-Benz 560SEL 1990 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Fuse/Relay Block	On left rear corner of engine compartment. See Fig. 1.

Mercedes-Benz 560SEL 1990 CONTROL UNITS LOCATION

Component	Location
ABS Electronic Control Unit	On right rear corner of engine compartment. See Fig. 4.
A/C Compressor Control Unit
420 & 560 SEL	Above right side of passenger's footwell. See Fig. 5.
560 SEC	On left rear side of engine compartment. See Fig. 3.
A/C Control Unit	Above right side of passenger's footwell. See Fig. 5.
Anti-Theft Control Unit	On right side of blower housing. See Fig. 5.
CIS-E Fuel Injection Control Unit
Top View	Above right side of passenger's footwell. See Fig. 4.
View of Control Unit	Above right side of passenger's footwell. See Fig. 5.
View From Passenger Compartment	Above right side of passenger's footwell. See Fig. 2.
Cruise Control Amplifier	Above right side of driver's footwell.
Cruise Control Unit	Above right side of passenger's footwell.
Electronic Illumination Control Unit	Under left side of dash.
Electronic Blower Control Unit	In blower housing.
Idle Speed Control Unit	Under passenger side floorboard. See Fig. 2.
Ignition Switching Control Unit	On left front inner wheelwell.
Key/Light Warning Module	Above left side of driver's footwell.
Oxygen Sensor Control Unit	On right side of passenger's footwell.
Seat Adjustment Control Unit	Under both front seats.
Seat Back Warning Module	On left side of driver's footwell.
Seat Belt Modules	Behind rear seat side panels.
SRS Control Unit	On right side of blower housing. See Fig. 5.
Transmission 1st Gear Control Unit	Under dash, above accelerator pedal.

Mercedes-Benz 560SEL 1990 SENDING UNITS & SENSORS LOCATION

Component	Location
A/C In-Car Temperature Sensor	In overhead roof panel.
A/C Temperature Sensor	In A/C evaporator assembly.
ABS RPM Sensor	On each front axle and on rear axle housing.
Airflow Sensor	On top of engine, just right of fuel distributor. See Fig. 2.
Brake Fluid Level Sensor	In brake fluid reservoir.
Coolant Temperature Sensor	On top of engine, in front of throttle body. See Fig. 2.
EGR Temperature Sensor	On left rear corner of left cylinder head. See Fig. 2.
Electronic Ignition Temperature Sensor	At top front of engine.
Fuel Gauge Sending Unit	Under first aid kit tray.
Heater Temperature Sensor	Behind center console, in heater housing.
Oil Pressure Sending Unit	In lower left rear of engine block.
Oil Temperature Sensor	On engine block, next to oil filter.
Outside Temperature Sensor	On front bumper, behind license plate.
Oxygen Sensor	Under right side of vehicle, in exhaust pipe. See Fig. 2.
SRS Impact Sensor	Under forward portion of center console.

Mercedes-Benz 560SEL 1990 MOTORS LOCATION

Component	Location
Antenna Motor
Top View	On left side of trunk. See Fig. 4.
Side View	On left side of trunk. See Fig. 1.
Auxiliary Water Pump (Heater)	On firewall, below heater water valve.
Central Lock Vacuum Supply Pump	In spare tire well.
Fuel Pump	Under vehicle, on right side of differential.
Gas Filler Door Lock Motor	On right side of trunk. See Fig. 4.
Orthopedic Seat Air Pump	In left rear wheelwell.
Seat Belt Extender Motor	Behind rear side panels.
Sun Roof Motor	In left front side of trunk. See Fig. 1.
Windshield Wiper Motor	Under vent cowl on left side.

Mercedes-Benz 560SEL 1990 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/C Flap Switchover Valves
Footwell Flap Valve	Behind A/C push button control assembly.
Left Fresh Air Flap Valve	Behind A/C push button control assembly.
Left Fresh Air Flap Valve (Stage 2)	Behind A/C push button control assembly.
Rear Seat Area Flap Valve	Behind A/C push button control assembly.
Recirculating Air Flap Valve	Behind A/C push button control assembly.
Right Fresh Air Flap Valve	Behind A/C push button control assembly.
Vent Flap (Stage 1)	Behind A/C push button control assembly.
Vent Flap (Stage 2)	Behind A/C push button control assembly.
Air Switchover Valve Solenoid	On left front wheelwell, behind headlights.
Defroster Flap Solenoid (Stage 1 & 2)	On right side of blower housing.
EGR Switchover Valve	On right side of engine compartment.
Heater Water Valve	On firewall, to left of battery.
Idle Speed Air Valve	On top of engine, in front of throttle body. See Fig. 2.
Kickdown Solenoid (A/T)	In right rear of transmission.
Seatback Lock Switch Valve (560 SEC)	Above accelerator pedal.

Mercedes-Benz 560SEL 1990 SWITCHES LOCATION

Component	Location
A/C Auxiliary Fan Temperature Switch	On engine coolant outlet.
A/C Cold Engine Lock-Out switch	In top left rear of engine.
A/C Low Pressure Cut-Out Switch	On receiver-drier, behind left headlights.
A/C Receiver-Drier Temperature Switch	On receiver-drier, behind left headlights.
Air Injection Coolant Temperature Switch	At right rear of engine.
Belt Extender Limit Switch	On extender arms.
Brake/Stoplight Switch	At top of brake pedal support.
Evaporator Temperature Regulator Switch	In left side of plenum, above driver's footwell.
Kickdown Solenoid (A/T)	Under accelerator pedal.
Starter Lock/Back-Up Light Switch	In left side of transmission.

Mercedes-Benz 560SEL 1990 MISCELLANEOUS LOCATION

Component	Location
A/C Blower Motor Resistors	Below power brake booster.
ABS Hydraulic Unit	On left front side of engine compartment. See Fig. 4.
Altitude Correction Capsule	On right side of blower housing. See Fig. 5.
Anti-Theft Alarm Horn	On right front corner of engine compartment. See Fig. 1.
CIS-E Fuel Injection Reference Resistor	Under passenger's footwell. See Fig. 2.
Cruise Control Amplifier	On left side of driver's footwell.
Diagnostic Connectors	In engine compartment, on left front fender. See Fig. 2.
California On-Board Diagnostic Connector	On right side of firewall, near battery. See Fig. 2.
Electro-Hydraulic Actuator	On top of engine, just left of fuel distributor. See Fig. 2.
Speedometer Impulse Transmitter	On left rear of transmission.
SRS Energy Accumulator	Under passenger's footwell.
SRS Emergency Tensioning Retractor	Below left and right inner door pillar posts.
SRS Voltage Converter	Under left side of dash, above pedal assembly.