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Service bulletin NCU-2020100001

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 id10186152
Published by NHTSA2021-02-01
Manufacturer's numberNCU-2020100001
Manufacturer's date2020-12-04
NHTSA componentFUEL SYSTEM, GASOLINE

NHTSA's summary

Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (?MY?) 2019-2020 G-Class vehicles (463 platform), the fuel tank filler hose may not be fitted properly, causing small amounts of fuel to leak when refueling. In this case, the vehicle may not meet emission requirements. Contact between potentially leaking fuel and hot component parts (e.g. exhaust system) is not possible, so a fire hazard can be ruled out. Nevertheless, the fuel tank filler hose should be inspected and replaced if necessary on the affected vehicles.

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

Fuel system

Vehicles listed
MERCEDES-BENZ AMG G632019 to 2020
MERCEDES-BENZ G 5502019 to 2020
MERCEDES-BENZ G632019 to 2020

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