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Service bulletin LI20.10-P-063817

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 id10136157
Published by NHTSA2018-05-07
Manufacturer's numberLI20.10-P-063817
Manufacturer's date2016-04-07
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Check Engine Lamp Illuminated - DTC: P012800 - Thermostat jams in open state. "The coolant temperature is below the coolant thermostat specified temperature" is stored in the engine control unit.

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

Engine

Trouble codes named

P0128

Vehicles listed
MERCEDES-BENZ MERCEDES-BENZ

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