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May 3, 2022 Service bulletin

Customer reports a warning message in red in the instrument cluster: "Water fording not possible! Service...

Mercedes-Benz technical service bulletin LI09.00-P-074794 for 2019-2020 Mercedes-Benz G 550 and 2019-2020 Mercedes-Benz G63.

Bulletin number
LI09.00-P-074794
Component
Electrical system
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 The message is no longer active following an ignition cycle.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)

Owners of these vehicles have filed 2 complaints in the electrical category.

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