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Service bulletin LI09.00-P-074794

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 id10213044
Published by NHTSA2022-06-02
Manufacturer's numberLI09.00-P-074794
Manufacturer's date2022-05-03
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Complaint Customer reports a warning message in red in the instrument cluster: "Water fording not possible! Service required". The message is no longer active following an ignition cycle. Cause As a result of an absent or aborted reference run of the air flaps of the N127 'drivetrain' control unit (PTCU), the fault codes P153001 and P153101 are stored in the fault memory and the "Water fording not possible" warning message appears in the instrument cluster. The flap system nevertheless functions correctly. Note: The fault codes must be the only ones stored in the fault memory. Additional entries in the fault memory that concern the intake air flap system could indicate a mechanical fault in the system Remedy 1. Perform software update of the N127 'powertrain' control unit (PTCU) (XENTRY data status 12/2021 or more recent)

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

Electrical system

Trouble codes named

P1530, P1531

Vehicles listed
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.