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.
1997 Mercedes Benz SL500FACTORY 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 | ||||
|---|---|---|---|---|---|
| Adjustable Camshaft Timing Solenoid (Left) | Y49/1 | ||||
| Adjustable Camshaft Timing Solenoid (Right) | Y49/2 | ||||
| Air Pump Switchover Valve | Y32 | ||||
| AIR Relay Module | K17 | ||||
| Base Module | N16/1 | ||||
| Body Acceleration Sensor | B24 | ||||
| Drive Authorization System (DAS) Control Module | N54/1 | ||||
| Camshaft (CMP) Sensor | B6/1 | ||||
| CAN BUS From ESP/SPS Control Module | N47-5 | ||||
| Check Engine Malfunction Indicator Light | A1e26 | ||||
| Crankshaft Position (CKP) Sensor | L5 | ||||
| Cruise Control Switch | S40 | ||||
| EA/CC/ISC Actuator | M16/6 | ||||
| Engine Control Module (ECM) | N3/10 | ||||
| Engine/Climate Control Electric Cooling Fan Control Module | N76 | ||||
| Engine Coolant Temperature (ECT) Sensor | B11/4 | ||||
| ECM Tachometer Signal | TN Signal | ||||
| ECM Voltage Supply Circuit | 87M | ||||
| Electronic Ground Right Component Compartment (Model 210) | W16/6 | ||||
| Electronic Ground, Right Footwell (Models 129 & 140) | W15/1 | ||||
| EVAP Charcoal Canister Shut-Off Valve | Y58/4 | ||||
| Fuel Injector | (1) Y62y1 | ||||
| Fuel Pump Relay Module (Models 129 & 140) | K27 | ||||
| Fuel Tank Pressure Sensor | B4/3 | ||||
| Ignition Coil | (2) T1/1 | ||||
| Intake Air Temperature (IAT) Sensor | B17 | ||||
| Knock Sensor 1 (Right) | A16g1 | ||||
| Knock Sensor 2 (Left) | A16g2 | ||||
| Mass Airflow Sensor (MAF) | B2/5 | ||||
| Oil Level Switch | S43 | ||||
| Output Ground Circuit Component Compartment (Model 140) | W15 | ||||
| Output Ground Control Module Box (Model 129) | W27 | ||||
| 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 | ||||
| Pedal Value Sensor | B37 | ||||
| Pressure Sensor | B28 | ||||
| Purge Control Valve | Y58/1 | ||||
| Purge Monitoring Pressure Sensor | B4/4 | ||||
| Relay Module (Model 210) | K40 | ||||
| Remote Central Locking (RCL) Control Module | N54 | ||||
| Stop Light Switch | S9/1 | ||||
| Transmission Control Module | N15/3 | ||||
| Vehicle Speed Sensor, Left Front Axle | L6/1 | ||||
| Vehicle Speed Sensor, Left Rear Axle | L6/3 | ||||
| Voltage Supply Circuit | Circuit 30 | ||||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.