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February 23, 2023 Service bulletin

Check engine light illuminated Red coolant warning in instrument cluster Fault codes U019F00 or U019F87...

Mercedes-Benz technical service bulletin LI20.10-P-075943 for 2016-2020 Mercedes-Benz C350E and 2018-2021 Mercedes-Benz GLC 350 E.

Bulletin number
LI20.10-P-075943
Component
Engine and engine cooling
Summary
Complaint Check engine light illuminated Red coolant warning in instrument cluster Fault codes U019F00 or U019F87 stored in PTCU (N127) Cause Electric coolant pump communication Remedy 1-Check electric connections on electric coolant pump M75/11 for clean/tight installation. Repair as needed. 2-Update software of MED40 control unit. 3-Replace electric coolant pump M75/11 with part A2742004900.

Owners of these vehicles have filed 11 complaints in the engine category.

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