Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1998 Mercedes Benz CLK320FACTORY OEM SERVICE PROCEDURE
Component/Circuit Identification
System components and connections are identified by the manufacturer with special designations in diagnostic information. See COMPONENT/CIRCUIT IDENTIFICATION table.
COMPONENT/CIRCUIT IDENTIFICATION
| Component/Circuit | Manufacturer's Designation | ||||
|---|---|---|---|---|---|
| Air Pump Relay Module | K40/4k3x | ||||
| Air Pump Switchover Valve | Y32 | ||||
| Backup Light Switch | S16/2 | ||||
| Drive Authorization System (DAS) Control Module | N54/1 | ||||
| Camshaft (CMP) Sensor | B6/1 | ||||
| CAN BUS From ESP/SPS Control Module | N47-5 | ||||
| Clutch Engage/Release Switch | S40/2 | ||||
| Crankshaft Position (CKP) Sensor | L5 | ||||
| Cruise Control Switch | S40 | ||||
| EA/CC/ISC Actuator | M16/6 | ||||
| EGR Switchover Valve | Y27 | ||||
| EGR Valve Vacuum Transducer | Y31/1 | ||||
| Engine Control Module (ECM) | N3/10 | ||||
| Engine/Climate Control Electric Cooling Fan Control Module | M4/3 | ||||
| Engine Coolant Temperature (ECT) Sensor | B11/4 | ||||
| ECM Tachometer Signal | TN Signal | ||||
| EVAP Charcoal Canister Shut-Off Valve | Y58/4 | ||||
| Fuel Injector | (1) Y62y1 | ||||
| Fuel Tank Pressure Sensor | B4/3 | ||||
| Fuse/Relay Panel | F1 | ||||
| Ignition Coil | (2) T1/1 | ||||
| Ignition/Starter Switch | S2/1 | ||||
| Knock Sensor 1 (Right) | A16g1 | ||||
| Knock Sensor 2 (Left) | A16g2 | ||||
| Mass Airflow Sensor (MAF) | B2/5 | ||||
| Oil Sensor | B40 | ||||
| Output Ground Circuit (Models 202, 208 & 210) | W16/6 | ||||
| Ground Circuit (Model 163) | W16 | ||||
| O2S 1 Left (Before TWC) | G3/3 | ||||
| O2S 1 Right (Before TWC) | G3/4 | ||||
| O2S 2 Left (After TWC) | G3/5 | ||||
| O2S 2 Right (After TWC) | G3/6 | ||||
| Passenger Side Fuse/Relay Panel | K40/4 | ||||
| Pedal Value Sensor | B37 | ||||
| Pressure Sensor | B28 | ||||
| Purge Control Valve | Y58/1 | ||||
| Relay Module | K40 | ||||
| Resonance Intake Manifold Switchover Valve | Y22/6 | ||||
| Starter Relay Module (Models 202, 208 & 210) | K40/4k2 | ||||
| Starter Relay Module (Model 163) | F1k8 | ||||
| Starter Signal Circuit | Circuit 50 | ||||
| Stop Light Switch | S9/1 | ||||
| Transmission Control Module | N15/3 | ||||
| Voltage Supply Circuit | Circuit 30 | ||||
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.