Mercedes-Benz C280 1997 - 1997 MERCEDES-BENZ C230 & C280

Mercedes-Benz C280 1997 - BUZZERS, RELAYS & TIMERS

Mercedes-Benz C280 1997 BUZZERS, RELAYS & TIMERS

Component	Component Location
Crash Shut-Off Relay	On right rear of engine compartment.
High Pressure/Return Pump Relay W/Traction Systems (ASR, ETS) & SPS (C280)	On lower left rear of engine compartment. See Fig. 1 .

Mercedes-Benz C280 1997 - CIRCUIT PROTECTION DEVICES

Mercedes-Benz C280 1997 CIRCUIT PROTECTION DEVICES

Component	Component Location
Fuse Box (In Trunk)	On right side of trunk.
Fuse & Relay Box	On left rear of engine compartment.
Passenger-Side Fuse & Relay Module Box W/Starter Relay, Relay Module & AIR Pump (C230)	On right rear of engine compartment. See Fig. 5 .
Passenger-Side Fuse & Relay Module Box W/Traction Systems (ASR, ETS) & SPS	On right side of engine compartment. See Fig. 1 .

Mercedes-Benz C280 1997 - CONTROL UNITS

Mercedes-Benz C280 1997 CONTROL UNITS

Component	Component Location
ABS Control Module (ABS Only) (C280)	On right rear of engine compartment. See Fig. 1 .
Air Bag Triggering Unit	On right rear of engine compartment.
Amplifier (Left/Right Speakers) Control Module	On left side of trunk.
Anti-Theft Alarm (ATA) Control Module	In trunk, below trim panel.
ASR/ETS/ESP Hydraulic Unit (C280)	On left side of engine compartment. See Fig. 1 .
ASR/SPS Control Module (ASR Only) (C280)	On right rear of engine compartment. See Fig. 1 .
Convenience Feature Control Unit	On front of trunk compartment.
Daytime Running Lamp Control Module	Behind left side of dash.
Engine Control Module (ME-SFI) (C230)	In module box, on right rear of engine compartment. See Fig. 5 .
Engine Control Module (C280)	In module box, on right rear of engine compartment.
ETS/SPS Control Module (ETS Only) (C280)	On right rear of engine compartment. See Fig. 1 .
Exterior Lamp Failure Monitoring Module	On left rear of engine compartment.
Fuel Pump (FP) Relay Module (C230)	On right side of trunk. See Fig. 5 .
Headlamp Range Adjustment Control Module	Below left side of rear seat.
Infrared Remote Central Locking (IRCL) Control Module	In trunk, below package shelf.
Infrared Remote Central Locking (IRCL) Receiver	On interior rear view mirror.
Left Infrared Transmitter & Receiver	On top of left "B" pillar.
Over Voltage Protection Relay Module (C280)	On center of engine compartment. See Fig. 1 .
Pneumatic System Equipment (PSE) Multi-Function Control Module	On right rear of passenger compartment.
Relay Module	In module box, on right rear of passenger compartment.
Right Infrared Transmitter & Receiver	On top of right "B" pillar.
Seat Belt Reminder Control Unit	Behind left side of dash.
Starter Lock-Out Relay Module (ATA)	Below left side of dash, near kick panel.
Traction System Control Module	In module box, on right rear of engine compartment.
Transmission Control Module (C280)	On rear of engine compartment. See Fig. 3 .

Mercedes-Benz C280 1997 - MOTORS

Mercedes-Benz C280 1997 MOTORS

Component	Component Location
Air Flap/Air Filter Actuator (C230)	On lower right front of engine.
Air Pump (C230)	On lower right front of engine.
Automatic Antenna	On right side of trunk.
Auxiliary Fans (2)	Front of engine compartment.
Headlamp Range Adjustment Motors	Behind each respective headlamp assembly.
ISC Actuator (C230)	On top left side of engine.
Wiper Motor	On center rear of engine compartment.

Mercedes-Benz C280 1997 - SENDING UNITS & SENSORS

Mercedes-Benz C280 1997 SENDING UNITS & SENSORS

Component	Component Location
ATA Tow Sensor	On right rear of passenger compartment.
Camshaft Hall-Effect Sensor (C230)	On top left front of engine. See Fig. 4 .
CKP Sensor (C230)	On left rear of engine. See Fig. 4 .
ECT Sensor (C230)	On top front of engine. See Fig. 4 .
Evaporator Temperature Sensor	Behind left side of dash, right of steering column.
Front Axle Headlamp Range Adjustment Sensor	Under left front of vehicle.
Fuel Tank Emissions Monitoring Pressure Sensor (C230)	On left rear of engine compartment.
Heater Core Temperature Sensor	Behind left side of dash, right of steering column.
Hot Film MAF Sensor (C230)	On fresh air intake tube. See Fig. 6 .
In-Car Temperature Sensor	In dome lamp assembly.
Knock Sensor (C230)	On left side of engine. See Fig. 4 .
Left Front Axle VSS Sensor (C280)	On left front wheel hub assembly. See Fig. 1 .
Left Rear Axle VSS Sensor (C280)	On left rear wheel hub assembly. See Fig. 1 .
Left Front Tire Pressure Indicator Sensor	W/Traction Systems (ASR, ETS) & SPS On left front of vehicle.
Left Fuel Level Sensor	On left side of fuel tank.
Outside Temperature Indicator Temperature Sensor	On front left side air intake below bumper.
Oxygen Sensor 1 (Before TWC) (C230)	On exhaust pipe, before TWC. See Fig. 6 .
Oxygen Sensor 2 (After TWC) (C230)	On exhaust pipe, after TWC. See Fig. 6 .
Pedal Value Sensor (C230)	On left rear of engine compartment, on accelerator linkage.
Pressure Sensor (C230)	On top left front of engine. See Fig. 4 .
Rear Axle Headlamp Range Adjustment Sensor	Under right rear of vehicle.
Rear Axle VSS Sensor (ABS Only) (C280)	On rear differential assembly. See Fig. 1 .
Refrigerant Pressure Sensor	On the receiver-drier, behind left headlamp.
Right Front Axle VSS Sensor (C280)	On right front wheel hub assembly. See Fig. 1 .
Right Fuel Level Sensor	On right side of fuel tank.
Right Rear Axle VSS Sensor (C280)	On right rear wheel hub assembly. See Fig. 1 .

Mercedes-Benz C280 1997 - SOLENOIDS & SOLENOID VALVES

Mercedes-Benz C280 1997 SOLENOIDS & SOLENOID VALVES

Component	Component Location
Adjustable Camshaft Timing Solenoid (C230)	On top front of engine. See Fig. 4 .
AIR Pump Switchover Valve (C230)	On top front of engine. See Fig. 4 .
EGR Switchover Valve (C230)	On top front of engine. See Fig. 4 .
Purge Control Valve (C230)	On left front corner of engine compartment. See Fig. 6 .
R/P Lock Solenoid (C280)	On gear shift selector assembly. See Fig. 2 .

Mercedes-Benz C280 1997 - SWITCHES

Mercedes-Benz C280 1997 SWITCHES

Component	Component Location
ASR Off Switch (ASR Only) (C280)	On instrument panel. See Fig. 1 .
Back-Up Lamp Switch	On gear shift selector assembly. See Fig. 2 .
Brake Fluid Level Switch	On brake fluid reservoir.
ECL Switch	On right rear of engine compartment.
Engine Hood Switch (Anti-Theft Alarm)	On front center of engine compartment.
Kickdown Switch (C280)	On floor, under accelerator pedal. See Fig. 2 .
Oil Level Switch (C230)	On front of oil pan.
Parking Brake Switch (C230)	On parking brake assembly.
Parking Brake Switch (C280)	On parking brake assembly. See Fig. 1 .
Stop Lamp Switch (4-Pin) (C230)	At top of brake pedal.
Stop Lamp Switch (4-Pole) (C280)	At top of brake pedal. See Fig. 1 .
Transmission Range Recognition Switch (Voltage Coded)	On gear shift selector assembly. See Fig. 2 .
Windshield Washer Fluid Level Switch	On windshield washer fluid reservoir.

Mercedes-Benz C280 1997 - MISCELLANEOUS

Mercedes-Benz C280 1997 MISCELLANEOUS

Component	Component Location
ABS MIL (C280)	On instrument panel. See Fig. 1 .
Alarm Horn	On left front center of engine compartment.
ASR MIL (ASR Only) (C280)	On instrument panel. See Fig. 1 .
ASR Warning Lamp (ASR Only) (C280)	On instrument panel. See Fig. 1 .
CHECK ENGINE MIL (C230)	On dash instrument panel.
Control Module Box (C280)	On right side of engine compartment. See Fig. 1 .
Data Link Connector (C230)	On left rear of engine compartment.
Data Link Connector (DTC Readout) (C230)	In module box, on right rear corner of engine compartment. See Fig. 5 .
Data Link Connector (C280)	In module box, on right rear corner of engine compartment. See Fig. 1 .
Data Link Connector (DTC Readout) (C280)	On right rear of engine compartment. See Fig. 1 .
Diagnostic Module (OBD II) Generic Scan Tool Connector (C230)	Under left side of dash.
ETS MIL (ETS Only) (C280)	On instrument panel. See Fig. 1 .
ETS Warning Lamp (ETS Only) (C280)	On instrument panel. See Fig. 1 .
Ignition Coil, Cylinder 1 & 4	On top rear of engine, under coil cover.
Ignition Coil, Cylinder 2 & 3	On top front of engine, under coil cover.

Mercedes-Benz C280 1997 - CONNECTORS

Mercedes-Benz C280 1997 CONNECTORS

Component	Component Location
X4	Left front footwell.
X4/22 (1-Pin)	Right kick panel.
X4/24	Right component compartment.
X11/4	Under left side of dash.
X11/13 (10-Pin)	Right kick panel.
X11/18	On passenger footplate.
X11/22	Under left side of dash.
X12/3	Left component compartment, forward of fuse box.
X14/3 (2-Pin)	Left side of dash, rear of fuse box.
X17/1-2	Right kick panel.
X17/1-2	Right kick panel.
X18	Left component compartment, beneath fuse & relay box.
X18/18 (4-Pin)	Left component compartment, beneath fuse & relay box.
X20	Vehicle interior, beneath dash, on brakelight switch.
X20/2	Left side of dash, at parking brake switch.
X21/1	Right kick panel.
X22/6 (2-Pin)	Behind left side of dash.
X24	Left side of dash, rear of fusebox.
X26	Left side of dash, rear of fusebox.
X26/9	Right kick panel.
X26/24 (3-Pin)	Left side of engine.
X26/25 (24-Pin)	Left front side of engine compartment.
X28/12	Right kick panel.
X33	At sill panel, beneath right front door.
X34/3	Under trim, at right "B" pillar.
X35/1	Left kick panel.
X35/2	Right kick panel.
X35/3	Base of left "B" pillar.
X35/4	Base of right "B" pillar.
X36/2	Right kick panel.
X36/3 (2-Pin)	In luggage compartment, at right wheelwell.
X39/4 (4-Pin)	Left component compartment, beneath fuse & relay box.
X39/5	Under center console.
X39/38	In dash, behind radio.
X42/13 (1-Pin)	In dash, behind & attached to radio.
X47	Right kick panel.
X49/1	Under right front side of center console.
X55/3	Beneath front of left front seat.
X55/4	Beneath front of right front seat.
X62/1	Under vehicle, at left rear wheelwell.
X62/2	Under vehicle, at right rear wheelwell.
X62/3 (6-Pin)	At sill panel, below right front door.
X62/5 (2-Pin)	Left front of engine compartment.
X62/11 (2-Pin)	In luggage compartment, forward of spare tire.
X62/12 (1-Pin)	Right kick panel
X62/13 (1-Pin)	Right kick panel
X64//4 (2-Pin)	Right of left headlamp.
X72/7 (4-Pin)	Left component compartment, beneath fuse & relay box.
X88/11 (2-Pin)	At left rear of hood.

Mercedes-Benz C280 1997 - GROUNDS

Mercedes-Benz C280 1997 GROUNDS

Component	Component Location
W1	Left side of dash, behind instrument cluster, on firewall. See Fig. 1 .
W6 (C230)	Left side of luggage compartment, below luggage compartment hinge. See Fig. 5 .
W6 (C280)	Left side of luggage compartment, below luggage compartment hinge. See Fig. 1 .
W7	In luggage compartment, at right wheelwell. See Fig. 1 .
W7/1	In luggage compartment. See Fig. 1 .
W10	At right side of luggage compartment, on frame rail near battery. See Fig. 1 .
W11 (C230)	Top front of engine.
W11 (C280)	Top front of engine. See Fig. 3 .
W11/1	Beneath vehicle, left side of transmission flange.
W14 (C230)	Left front side of engine compartment.
W14 (C280)	Left front side of engine compartment.
W16/3 (C230)	Beneath washer fluid container.
W16/3 (C280)	Beneath washer fluid container. See Fig. 3 .
W16/4 (C230)	Right component compartment.
W16/4 (C280)	Right component compartment. See Fig. 3 .
W16/5 (C230)	Beneath washer fluid container.
W16/5 (C280)	Beneath washer fluid container. See Fig. 3 .
W16/6 (C230)	Right component compartment.
W16/6 (C280)	Right component compartment. See Fig. 3 .
W18 (C230)	Beneath left front seat. See Fig. 5 .
W18 (C280)	Beneath left front seat. See Fig. 1 .
W19 (C230)	Beneath right front seat, near door sill. See Fig. 5 .
W19 (C280)	Beneath right front seat, near door sill. See Fig. 1 .
W26	Center console, forward of shifter, beneath mounting lug for SRS control module.
W29/2	Right side of dash, near door jamb.
W30	Beneath vehicle, left of transmission.
W30/1	Left front side of engine compartment, near A/C receiver-drier. See Fig. 1 .
W30/2	Left front of engine, on power steering pump. See Fig. 1 .
W31 (C230)	Left side of luggage compartment, below luggage compartment hinge. See Fig. 5 .
W31 (C280)	Left side of luggage compartment, below luggage compartment hinge. See Fig. 1 .

Mercedes-Benz C280 1997 - SPLICES

Mercedes-Benz C280 1997 SPLICES

Component	Component Location
Z2	Center rear of engine compartment, at firewall, 500 mm from S11.
Z3	In wiring harness, rear of engine compartment, on firewall.
Z3/1	Left center of dash, near windshield.
Z3/15	In wiring harness, near center console.
Z3/25	In wiring harness, near center console.
Z4/4	In right component compartment.
Z6	Left front door rubber boot, between door & door jamb.
Z6/16	Left center of dash, at base of windshield.
Z6/18	Right component compartment, near engine control module.
Z7/1	In left harness crosstray, on left of center console.
Z7/24	At circuit 87 connector sleeve (feed from overvoltage protection relay module K1).
Z7/25	Approximately, 550 mm from (kickdown cut-out relay module) connector, towards center of vehicle.
Z7/29	At circuit 87 connector sleeve (feed from overvoltage protection relay module K1).
Z9	In engine harness, center rear of engine compartment.
Z10	Bottom left side of luggage compartment, in CTEL transmitter/receiver connector.
Z11	Bottom left side of luggage compartment, in CTEL transmitter/receiver connector.
Z21/2	In right harness crosstray, on lower right of console.
Z21/5	Right front door sill.
Z21/6	Right front door sill.
Z23	In main harness, between EA/CC/ISC control module & ASR brake fluid level switch.
Z23/2	In main harness, between EA/CC/ISC control module & ASR brake fluid level switch.
Z28/1	At left rear speaker connector.
Z28/5	In wiring tray, between crosspiece & left front footwell.
Z28/6	In wiring tray, between crosspiece & left front footwell.
Z28/7	In wiring tray, between crosspiece & left front footwell.
Z28/8	In wiring tray, between crosspiece & left front footwell.
Z28/10	Bottom left side of luggage compartment, in CTEL transmitter/receiver connector.
Z30/1	Behind instrument cluster, at sleeve to left turn signal connector.
Z30/2	Behind instrument cluster at sleeve to right turn signal connector.
Z81	In left harness tray, at left rear of center console.
Z81/4	In left harness crosstray, on left of center console.
Z84/1	In main harness, between EA/CC/ISC control module & ASR brake fluid level switch.
Z84/2	In main harness, between EA/CC/ISC control module & ASR brake fluid level switch.
Z96	Right component compartment, within control module connector plug.
Z99	In main harness, between EA/CC/ISC control module & ASR brake fluid level switch.