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April 29, 2025 Service bulletin

Complaint Yellow instrument cluster message: "Cooling system fault, operating energy input reduced,...

Mercedes-Benz technical service bulletin LI83.30-P-079196 for 2022-2024 Mercedes-Benz EQS 450, 2023-2024 Mercedes-Benz EQE 350+ and 2022-2024 Mercedes-Benz EQS 580 and others.

Bulletin number
LI83.30-P-079196
Component
Engine
Summary
Complaint Yellow instrument cluster message: "Cooling system fault, operating energy input reduced, service required" Cause Fault code "B3A0077 - The regulation valve in the refrigerant circuit for the battery cooling gets stuck open. The ordered position cannot be achieved" stored. Faulty expansion valve component part Y140/1 Remedy Check the part number of Y140/1. If the vehicle has A 297 830 79 03 or older, replace Y140/1 with A 297 830 89 03 or newer. If the vehicle already has A 297 830 8903, do not replace Y140/1. Please create TIPS case, attach the current quick test and attach picture of the evaporator assembly component part label and a picture of the production date of the EXV Y140/1 (see exampled attached).

Owners of these vehicles have filed 3 complaints in the engine category.

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