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.
2012 Mercedes Benz CL600FACTORY OEM SERVICE PROCEDURE
Fuel Controls DTCS (FSCU5)
FUEL CONTROLS DTCS (FSCU5)
| MB DTC | Module | Description |
|---|---|---|
| 008700 | FSCU5 | The fuel pressure in the system is too low. |
| 062700 | FSCU5 | The fuel pump is malfunctioning or has an open circuit. |
| 062800 | FSCU5 | The fuel pump has a short circuit to ground. |
| 062900 | FSCU5 | The fuel pump has a short circuit to positive. |
| 062A00 | FSCU5 | The output of the fuel pump is implausible. |
| 124000 | FSCU5 | The CAN bus is malfunctioning. |
| 162A00 | FSCU5 | The 'fuel pump' control unit is malfunctioning. |
| 253900 | FSCU5 | The fuel pressure sensor of the low pressure circuit is malfunctioning. |
| 254000 | FSCU5 | The signal of the fuel pressure sensor for the low pressure circuit is implausible. |
| 254100 | FSCU5 | The fuel pressure sensor of the low pressure circuit has a short circuit to ground. |
| 254200 | FSCU5 | The fuel pressure sensor of the low pressure circuit has a short circuit to positive. |
| C10000 | FSCU5 | Communication with the engine control unit is malfunctioning. |
| C11100 | FSCU5 | Communication with control unit 'Battery' has a malfunction. |
| C15500 | FSCU5 | Communication with the instrument cluster has a malfunction. |
| C16800 | FSCU5 | Communication with the electronic ignition switch is malfunctioning. |
| C31000 | FSCU5 | The control unit software is missing or faulty. |
| D60100 | FSCU5 | The control unit software is missing or faulty. |
| E0A7C00 | FSCU5 | The control unit is overheated. |
| E161100 | FSCU5 | The fuel pump has been switched off. |
| EA10D00 | FSCU5 | Local undervoltage of component N118 (Fuel pump control module) |
| EA10E00 | FSCU5 | Local overvoltage of component N118 (Fuel pump control module) |
| EC40100 | FSCU5 | Implausible data was received from the engine control unit. |
| EC42700 | FSCU5 | Implausible data was received from the electronic ignition switch. |
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.