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February 14, 2026 Service campaign

Engine

Mercedes-Benz technical service bulletin NCU - 2024090007 for 2019-2023 Mercedes-Benz C300, 2020-2023 Mercedes-Benz E350 and 2019-2023 Mercedes-Benz GLE 350 and others.

Bulletin number
NCU - 2024090007
Component
Engine
Summary
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the engine control unit software does not correspond to current production specifications. As a consequence, the functionality of the post-catalyst oxygen sensor may be impaired due to increased thermal loading. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the engine control unit software.

Owners of these vehicles have filed 204 complaints in the engine category.

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