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January 6, 2026 Service bulletin

Complaint CEL on with Code P012800 "The Coolant Temperature is Below the Specified Temperature" Cause...

Mercedes-Benz technical service bulletin LI20.10-P-072886 for 2018 Mercedes-Benz AMG E63, 2021, 2023 Mercedes-Benz S 580 and 2022-2025 Mercedes-Benz S 580 4matic and others.

Bulletin number
LI20.10-P-072886
Component
Engine
Summary
Complaint CEL on with Code P012800 "The Coolant Temperature is Below the Specified Temperature" Cause Under investigation. This is not an issue that affects drivability or performance and is not a safety concern. The vehicle remains safe to operate with this code, but the measures listed in the "Remedy" section are recommended. Remedy 1. Use VMI to check for Emission Extended Warranty – Engine Thermostat (incl. software update) MY19-23, Various Models and Platforms (167, 190, 205, 213, 217, 222, 223, 232, 253, 290, 463) 2. If the vehicle is covered under the Emission Extended Warranty, Please perform steps outlined in the NCU for repairs. 3. If vehicle does not fall into the covered area of the Extended Warranty please proceed with "Remedy Instructions" in attachments. Due to formatting issues please see "remedy instructions" in attachments

Owners of these vehicles have filed 49 complaints in the engine category.

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