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September 26, 2026 Service bulletin

Fuel Level Unchanged After Refueling Complaint The customer reports that the fuel gauge shows inaccurate...

Mercedes-Benz technical service bulletin LI47_00-N-069565_6_en for 2019-2021, 2023-2026 Mercedes-Benz Sprinter 2500, 2019-2021, 2023-2026 Mercedes-Benz Sprinter 3500 and 2019-2021, 2023-2024 Freightliner Sprinter 2500 and others.

Bulletin number
LI47_00-N-069565_6_en
Component
Unknown or other
Summary
Fuel Level Unchanged After Refueling Complaint The customer reports that the fuel gauge shows inaccurate readings or remains unchanged after refueling. Cause The fuel level display may be incorrect due to one or both of the following conditions: 1. The Fuel Supply Control Unit (FSCU) may not recognize a refueling event if the Controller Area Network (CAN) does not enter sleep mode. This may occur if the vehicle is refueled with the engine running, the ignition is switched on during refueling, or aftermarket or upfitter‑installed equipment keeps the vehicle powered. 2. The fuel level sensor float or sensor arm may be restricted by the low‑pressure fuel pump pickup tube, fuel lines, electrical wiring, or an incorrectly positioned component. The fuel level sensor may become stuck above or below the pickup tube and indicate an incorrect fuel level. Similar FSCU actual values do not rule out a mechanical restriction. The fuel level sensor may be physically held at an incorrect position while the two actual values remain similar.

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