Mercedes-Benz C280 1999 - 1999 MERCEDES-BENZ C230 & C280

Mercedes-Benz C280 1999 - BUZZERS, RELAYS & TIMERS

Mercedes-Benz C280 1999 BUZZERS, RELAYS & TIMERS

Component	Component Location
Combination Relay	In fuse & relay box.
High Pressure/Return Pump Relay	On lower left rear of engine compartment.
Solenoid Valve Relay	On left front of engine compartment.
Starter Relay	In passenger's side fuse & relay module box.

Mercedes-Benz C280 1999 - CIRCUIT PROTECTION DEVICES

Mercedes-Benz C280 1999 CIRCUIT PROTECTION DEVICES

Component	Component Location
Fuse Box	In fuse & relay box.
Fuse & Relay Box	On left rear of engine compartment. See Fig. 1 .
Maxi-Fuse Box	In fuse & relay box.
Passenger's Side Fuse & Relay Module Box	On right rear of engine compartment.
Rear Fuse Box	On right side of trunk. See Fig. 1 .

Mercedes-Benz C280 1999 - CONTROL UNITS

Mercedes-Benz C280 1999 CONTROL UNITS

Component	Component Location
ABS Control Module (C230)	On right rear of engine compartment. See Fig. 1 .
ABS Control Module (C280)	On passenger's footplate. See Fig. 1 .
AIR Relay Module	In fuse & relay box.
Amplifier (Left/Right Speakers) Control Module	On left side of trunk.
Anti-Theft Alarm (ATA) Control Module	In trunk, below trim panel. See Fig. 1 .
ASD Control Module	On right rear of engine compartment. See Fig. 1 .
ASR Charging Pump Relay Module	In fuse & relay box.
ASR Control Module	On right rear of engine compartment. See Fig. 1 .
ASR/ETS/ESP Hydraulic Unit	On left front of engine compartment.
Auxiliary Fan Relay Module (Stage 1)	In fuse & relay box.
Auxiliary Fan Relay Module (Stage 2)	In fuse & relay box.
Auxiliary Fan Relay Module (Stage 1 & 2)	In fuse & relay box.
CC Control Module	On right rear of engine compartment. See Fig. 1 .
CC/ISC Control Module	On right rear of engine compartment. See Fig. 1 .
CF Control Module	On lower right rear of trunk, near battery. See Fig. 1 .
CF Relay Module	On right side of trunk floor, rear of wheelwell. See Fig. 1 .
CTEL Transmitter/Receiver	In bottom left rear of trunk.
DAS Control Module	Behind instrument cluster. See Fig. 1 .
Daytime Running Light Control Module	Behind left side of dash.
Diagnostic Module (OBD II)	On passenger's floor plate. See Fig. 1 .
EA/CC/ISC Control Module	On right rear of engine compartment. See Fig. 1 .
Electric Cooling Fan Control Module	In left front wheelwell, on frame rail. See Fig. 1 .
Engine Control Module (ME-SFI)	In module box, on right rear of engine compartment. See Fig. 1 .
ESA Relay Module	On right side of trunk floor, rear of wheelwell. See Fig. 1 .
ETS/SPS Control Module (C230)	On right rear of engine compartment. See Fig. 1 .
ETS/SPS Control Module (C280)	On passenger's footplate. See Fig. 1 .
Exterior Light Failure Monitoring Module	On left rear of engine compartment.
Fuel Pump (FP) Relay Module	On right side of trunk.
HCS Relay Module	In fuse & relay box.
Horn Relay Module	In fuse & relay box.
Kickdown Cut-Out Relay Module	In right rear of engine compartment.
Over Voltage Protection Relay Module (C230)	On right rear of engine compartment.
Over Voltage Protection Relay Module (C280)	On right rear of engine compartment.
O2S2 Heater Relay Module	In fuse & relay box.
Pneumatic System Equipment (PSE) Control Module	On right side rear of trunk. See Fig. 1 .
Remote Central Locking (RCL) Control Module	In trunk, below package shelf. See Fig. 1 .
Seat Belt Warning Module	Behind left kick panel.
Separation Relay Module	In fuse & relay box.
SRS Control Module	On transmission tunnel, forward of shifter. See Fig. 1 .
Starter Lock-Out Relay Module (ATA)	Behind dash, above left kick panel.
Traction System Control Module	In module box, on right rear of engine compartment.
Transmission Control Module	On rear of engine compartment.

Mercedes-Benz C280 1999 - MOTORS

Mercedes-Benz C280 1999 MOTORS

Component	Component Location
Air Pump	On lower right front of engine.
ASR/ESP Charging Pump	On master cylinder.
Auxiliary Fans (2)	Front of engine compartment.
Coolant Circulation Pump	In lower right front of engine compartment, on frame rail.
Fuel Pump	On rear underside of vehicle, right of differential.
Headlight Washer Pump	On lower front of washer reservoir.
ISC Actuator	On top left side of engine.
Sliding/Pop-Up Roof Motor	On center of windshield header, behind dome light.
Throttle Valve Actuator (C230)	On top left of engine.
Throttle Valve Actuator (C280)	On left center of engine, beneath intake manifold.
Windshield Washer Pump	On lower right side of washer reservoir.
Wiper Motor	On center rear of engine compartment.

Mercedes-Benz C280 1999 - SENDING UNITS & SENSORS

Mercedes-Benz C280 1999 SENDING UNITS & SENSORS

Component	Component Location
Camshaft Hall Effect Sensor (C230)	On top left front of engine.
Camshaft Hall Effect Sensor (C280)	On top left front of engine.
CKP Sensor	On left rear of engine.
CMP Sensor (C230)	On left front of engine.
CMP Sensor (C280)	On left front of engine.
DM Pressure Sensor (C230)	On top left center of engine.
DM Pressure Sensor (C280)	On left side of engine compartment.
ECT Sensor (C230)	On top front of engine.
ECT Sensor (C280)	On left front of engine.
Evaporator Temperature Sensor	Above accelerator pedal, on left side of heater box.
Fuel Tank Emissions Monitoring Pressure Sensor	On left rear of engine compartment.
Heater Core Temperature Sensor	In console behind radio, on heater box.
Hot Film MAF Sensor (C230)	On fresh air intake tube.
Hot Film MAF Sensor (C280)	On fresh air intake tube.
IAT Sensor	On left side of engine, in air intake duct.
In-Car Temperature Sensor	In dome light assembly.
Knock Sensor (C230)	On left side of engine, between cylinders 2 & 3.
Knock Sensor No. 1 (C280)	On left side of engine block.
Knock Sensor No. 2 (C280)	On left side of engine block.
Left Front Axle VSS Sensor	On left front wheel hub assembly.
Left Rear Axle VSS Sensor	On left rear wheel hub assembly.
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 No. 1 (Before TWC) (C230)	On exhaust pipe, before TWC.
Oxygen Sensor No. 1 (Before TWC) (C280)	On exhaust pipe, before TWC.
Oxygen Sensor No. 2 (After TWC) (C230)	On exhaust pipe, after TWC.
Oxygen Sensor No. 2 (After TWC) (C280)	On rear of TWC.
Rear VSS Sensor	On rear differential assembly.
Refrigerant Pressure Sensor	On the receiver-drier, behind left headlight.
Refrigerant Temperature Sensor	On the receiver-drier, behind left headlight.
Right Front VSS Sensor	On right front wheel hub assembly.
Right Fuel Level Sensor	On right side of fuel tank.
Right Rear Axle VSS Sensor	On right rear wheel hub assembly.
Starter Ring Gear Speed Sensor	On left rear of engine.

Mercedes-Benz C280 1999 - SOLENOIDS & SOLENOID VALVES

Mercedes-Benz C280 1999 SOLENOIDS & SOLENOID VALVES

Component	Component Location
Adjustable Camshaft Timing Solenoid (C230)	On top front of engine.
Adjustable Camshaft Timing Solenoid (C280)	On top front of engine.
AIR Pump Switchover Valve	On top front of engine.
EGR Switchover Valve	On top front of engine.
Purge Control Valve	On left front corner of engine compartment.
Purge Flow Switchover Valve	On left front corner of engine compartment.
Upshift Delay Solenoid Valve	In module box, on right rear of engine compartment.

Mercedes-Benz C280 1999 - SWITCHES

Mercedes-Benz C280 1999 SWITCHES

Component	Component Location
Back-Up Light Switch	On gear shift selector assembly.
Brake Fluid Level Switch	On brake fluid reservoir.
ECL Switch	On bottom of coolant reservoir.
Engine Hood Switch (Anti-Theft Alarm)	On front center of engine compartment.
Kickdown Switch	On floor, under accelerator pedal.
Oil Level Switch (C230)	On left side of oil pan.
Oil Level Switch (C280)	On left side of oil pan.
Parking Brake Switch	On parking brake assembly.
Starter Lock-Out/Back-Up Light Switch	On left side of transmission.
Stoplight Switch	At top of brake pedal.
Transmission Range Recognition Switch (Voltage Coded)	On gear shift selector assembly.
Windshield Washer Fluid Level Switch	On windshield washer fluid reservoir.

Mercedes-Benz C280 1999 - MISCELLANEOUS

Mercedes-Benz C280 1999 MISCELLANEOUS

Component	Component Location
Alarm Horn	Behind left side of front bumper.
Control Module Box	On right rear of engine compartment.
Data Link Connector (DTC Readout)	In module box, on right rear corner of engine compartment.
Data Link Connector (DLC) (OBD II)	On lower left side of dash. See Fig. 1 .
Electrolytic Capacitor (Alternator Noise Suppressor)	Beneath accelerator pedal.
Ignition Coil, Cylinder 1 & 4 (C230)	On top rear of engine, under coil cover.
Ignition Coil, Cylinder 2 & 3 (C230)	On top front of engine, under coil cover.
Infrared Remote Central Locking (IRCL) Receiver	On interior rear view mirror.
Left Front Door IR Receiver	Part of driver's door handle.
SRS Test Connector	Behind right kick panel.
Trunk Lid IR Receiver	On trunk lid, left of lock cylinder.

Mercedes-Benz C280 1999 - CONNECTORS

Mercedes-Benz C280 1999 CONNECTORS

Component	Component Location
X4	Left front footwell.
X11/4 (35-Pin)	Right component compartment.
X11/22 (16-Pin)	Under left side of dash.
X12/3 (1-Pin)	Left component compartment, forward of fuse box.
X18 (1) (2-Pin)	Left component compartment, beneath fuse & relay box.
X18 (2) (4-Pin)	Left component compartment, beneath fuse & relay box.
X18 (3) (4-Pin)	Left component compartment, beneath fuse & relay box.
X20 (2-Pin)	Vehicle interior, beneath dash, on brakelight switch.
X22/2 (4-Pin)	Right kick panel.
X25/4 (6-Pin)	At sill panel, below right front door.
X25/9 (2-Pin)	At left side of engine compartment, near ABS hydraulic unit.
X26/23 (4-Pin)	At sill panel, below right front door.
X26/27 (8-Pin)	Behind left side of front bumper.
X28/4 (2-Pin)	At sill panel, below left "B" pillar.
X28/12 (2-Pin)	Right kick panel.
X33/17 (3-Pin)	At right front of luggage compartment.
X35/3 (1) (4-Pin)	At base of left "B" pillar.
X35/3 (2) (3-Pin)	At base of left "B" pillar.
X35/4 (1) (4-Pin)	At base of right "B" pillar.
X35/4 (2) (3-Pin)	At base of right "B" pillar.
X35/27 (3-Pin)	At sill panel, beneath right front door.
X35/28 (6-Pin)	At right rear of luggage compartment.
X35/41 (1) (4-Pin)	At base of left "B" pillar.
X35/41 (2) (4-Pin)	At base of left "B" pillar.
X35/41 (3) (2-Pin)	At base of left "B" pillar.
X35/41 (4) (6-Pin)	At base of left "B" pillar.
X35/41 (5) (8-Pin)	At base of left "B" pillar.
X35/42 (1) (4-Pin)	At sill panel, beneath right front door.
X35/42 (2) (6-Pin)	At sill panel, beneath right front door.
X35/42 (3) (24-Pin)	At sill panel, beneath right front door.
X36/3 (2-Pin)	In luggage compartment at right wheelwell.
X39/5 (10-Pin)	Under center console.
X43/3 (1-Pin)	At sill panel, beneath right front door.
X47 (8-Pin)	Right kick panel.
X55/3 (12-Pin)	Beneath front of left front seat.
X55/3 (C) (4-Pin)	Beneath front of left front seat.
X55/3 (D) (2-Pin)	Beneath front of left front seat.
X55/4 (12-Pin)	Beneath front of right front seat.
X55/4 (C) (4-Pin)	Beneath front of right front seat.
X55/4 (D) (4-Pin)	Beneath front of right front seat.
X58/3 (2-Pin)	In left front footwell.
X62/1 (2-Pin)	Under vehicle, at left rear wheelwell.
X62/2 (2-Pin)	Under vehicle, at right rear wheelwell.
X62/6 (4-Pin)	In right front wheelwell.
X62/7 (4-Pin)	At top of left front wheelwell.
X64/4 (2-Pin)	Under left headlamp.

Mercedes-Benz C280 1999 - GROUNDS

Mercedes-Benz C280 1999 GROUNDS

Component	Component Location
W1	Left side of dash, behind instrument cluster, on firewall. See Fig. 1 .
W6	Left side of luggage compartment, below luggage compartment hinge. See Fig. 1 .
W7	In luggage compartment at right wheelwell. See Fig. 1 .
W10	At right side of luggage compartment, on frame rail near battery. See Fig. 1 .
W11	Front top of engine. See Fig. 1 .
W11/3	At left side of engine. See Fig. 1 .
W16/3	Beneath washer fluid container. See Fig. 1 .
W16/4	Right component compartment. See Fig. 1 .
W16/5	Beneath washer fluid container. See Fig. 1 .
W16/6	Right component compartment. See Fig. 1 .
W18	Beneath left front seat. See Fig. 1 .
W19	Beneath right front seat, near door sill. See Fig. 1 .
W26	Center console, forward of shifter, beneath mounting lug for SRS control module. See Fig. 1 .
W29/2	Right side of dash, near door jamb. See Fig. 1 .

Mercedes-Benz C280 1999 - SPLICES

Mercedes-Benz C280 1999 SPLICES

Component	Component Location
Z2	Center rear of engine compartment, along firewall, 500 mm from S11.
Z3	Rear of engine compartment, in wiring harness on firewall.
Z3/1	Left center of dash near windshield.
Z3/15	In wiring harness, near center console.
Z3/26	In wiring harness, near center console.
Z3/27	Left component compartment.
Z3/29	In engine harness, center rear of engine compartment.
Z4/4	In right component compartment.
Z6/1	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.
Z7/29	At circuit 87 connector sleeve (feed from overvoltage protection relay module K1).
Z7/35	In engine harness, center rear of engine compartment.
Z9	In engine harness, center rear of engine compartment.
Z10	In bottom left side of luggage compartment, in CTEL transmitter/receiver connector.
Z11	In 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	In 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.
Z36/3	In engine compartment harness, behind left front bumper.
Z36/4	In engine compartment harness, behind left front bumper.
Z36/8	Behind instrument cluster.
Z37/2	In right engine compartment harness, under right fuse & relay box.
Z37/3	In right engine compartment harness, under right fuse & relay box.
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.
Z87/15	Behind radio.
Z96	Right component compartment, in control module connector plug.
Z99	In main harness, between EA/CC/ISC control module & ASR brake fluid level switch.

Mercedes-Benz C280 1999 - COMPONENT LOCATION GRAPHICS

NOTE:

Fig.res may show multiple component locations. - appropriate table for proper figure references.

Fig. 1: Mercedes-Benz C280 1999 - Component Locations - Vehicle Overview