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 CL63FACTORY OEM SERVICE PROCEDURE
DTC Index - Fuel Controls (FSCU7): Application
FUEL CONTROLS APPLICATION (FSCU7)
| Model | Chassis Code | Engine Code | Model Year | Control Module |
|---|---|---|---|---|
| CL550 4M | 216.394 | 278.920 | 2011 | FSCU5/FSCU7 |
| CL550 4M | 216.394 | 278.920 | 2012 | FSCU5/FSCU7 |
| CL550 4M | 216.394 | 278.920 | 2013 | FSCU5/FSCU7 |
| CL63 AMG | 216.374 | 157.980 | 2011 | FSCU5/FSCU7 |
| CL63 AMG | 216.374 | 157.980 | 2012 | FSCU5/FSCU7 |
| CL63 AMG | 216.374 | 157.980 | 2013 | FSCU5/FSCU7 |
| ML350 BlueTEC 4M | 166.024 | 642.826 | 2012 | FSCU5/FSCU7 |
| ML350 BlueTEC 4M | 166.024 | 642.826 | 2013 | FSCU5/FSCU7 |
| S350 BlueTEC 4M | 221.083 | 642.868 | 2012 | FSCU5/FSCU7 |
| S350 BlueTEC 4M | 221.083 | 642.868 | 2013 | FSCU5/FSCU7 |
| S550 | 221.173 | 278.932 | 2012 | FSCU5/FSCU7 |
| S550 | 221.173 | 278.932 | 2013 | FSCU5/FSCU7 |
| S63 AMG | 221.174 | 157.980 | 2011 | FSCU5/FSCU7 |
| S63 AMG | 221.174 | 157.980 | 2012 | FSCU5/FSCU7 |
| S63 AMG | 221.174 | 157.980 | 2013 | FSCU5/FSCU7 |
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.