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Service bulletin Launch NCU 20210

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10191256
Published by NHTSA2021-05-03
Manufacturer's numberLaunch NCU 20210
Manufacturer's date2021-03-26
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2020 C-Class (205) and GLE-Class (167) vehicles, the mixing ratio of coolant to antifreeze may not meet production specifications.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
MERCEDES-BENZ C 3002020
MERCEDES-BENZ C 3502020
MERCEDES-BENZ C 350 E2020
MERCEDES-BENZ CLA 2502020
MERCEDES-BENZ CLS 4502020
MERCEDES-BENZ GLE 3502020
MERCEDES-BENZ GLE 350 E2020
MERCEDES-BENZ GLE 4502020
MERCEDES-BENZ GLE 5802020

Listing a model year does not mean every vehicle of it is concerned: the document says which.