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.
2000 Mercedes Benz CL500FACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Component Location |
|---|---|
| Active Body Control, Control Module | In right front fuse & relay module box. |
| ASR/ETS/ESP Hydraulic Unit | At left front of engine compartment. |
| ASR/SPS Control Module | In right front fuse & relay module box. |
| Auxiliary Fan Relay Module (Stage 1) | In left front fuse & relay box. |
| Auxiliary Fan Relay Module (Stage 2) | In left front fuse & relay box. |
| BAS Control Module | Next to brake booster. |
| CTEL Transmitter/Receiver/Voice Activation Module | At bottom left rear of trunk. |
| DAS Control Module | Behind instrument cluster. |
| Daytime Running Light Control Module | Behind left side of dash. |
| Distronic Control Unit | At front of passenger footwell, under carpet. See Figure . |
| Door Control Module (2) | In respective door. |
| Electric Cooling Fan Control Module | In left front wheelwell, on frame rail. |
| Engine Control Module | At right front fuse & relay module box. |
| ESP Control Module | At left rear of engine compartment. See Figure . |
| ETC Control Unit | At left rear of engine compartment. See Figure . |
| Exterior Light Failure Monitoring Module | In left front fuse & relay box. |
| Fuel Pump Relay Module | At right side of trunk. |
| Garage Door Opener Control Module | On left sun visor. |
| High Pressure/Return Pump Relay Module | In left front fuse & relay box. |
| Horn Relay Module | In left front fuse & relay box. |
| Left Front SAM Control Module | Under left front fuse & relay box. |
| O2S2 Heater Relay Module | In left front fuse & relay box. |
| PSE Control Module | At right side rear of trunk. See Figure . |
| PTS Control Module | Under right side of rear seat. See Figure . |
| Rear SAM Control Module | Under rear compartment fuse & relay box. |
| Remote Central Locking Control Module | In trunk, below package shelf. |
| Right Front SAM Control Module | In right front fuse & relay module box. |
| SRS Control Module | On transmission tunnel, forward of shifter. |
| Starter Lock-Out Relay Module | Behind dash, above left kick panel. See Figure . |
| Transmission Control Module | In passenger's footwell. See Figure . |
| Upper Control Panel Module | Behind upper center of dash. See Figure . |
| Xenon Headlight Control Module (2) | Behind respective headlight. |
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.