HomeLI20.10-P-078510 · MERCEDES-BENZ
MERCEDES-BENZ

LI20.10-P-078510

Manufacturer communications

Publication date
2025-02-06
Received by NHTSA
2025-02-12
NHTSA record numbers
11014223

Manufacturer summary

Original wording in English

Complaint Red cooling system malfunction warning due to overheat. Low engine performance. Check engine light on. Fault codes may be stored: P21814B The cooling system has a malfunction. There is a fault due to overtemperature. P2B8500 The rpm of the coolant pump is too low. Cause Various Remedy Check for loose plug at electrical connectors of high temp coolant pump (M43/10 or M75/11) by gently pulling on connector housings. Create a TIPS case and submit to powertrain team inbox if a loose plug is found at the coolant pump. Include: -Initial quick test -Details on any damage found to engine or cooling system. Include photos if applicable. -Any other relevant details.

NHTSA manufacturer communications ↗

Reported code forms

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

MakeModelModel year
Mercedes-BenzC 3002024
Mercedes-BenzC 3002023
Mercedes-BenzC 3002022
Mercedes-BenzGLE 3502024
Mercedes-BenzGLE 3502023
Mercedes-BenzGLE 350 4MATIC2025
Mercedes-BenzGLE 4502023
Mercedes-BenzGLE 450E 4MATIC2025
Mercedes-BenzGLE 450E 4MATIC2024

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