# Service bulletin LI20.10\-P\-076206

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.

- Type: Service bulletin
- NHTSA id: 11013331
- Published by NHTSA: 2025\-01\-31
- Manufacturer's number: LI20.10\-P\-076206
- Manufacturer's date: 2025\-01\-27
- NHTSA component: ENGINE

## NHTSA's summary

Complaint Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy Please refer to the specific repair instructions for the vehicle you are working on in the attachments section of this LI. Before beginning the flushing procedure, remove the thermostat and inspect it for debris. Pay close attention to the gap between the inner sleeve and the body of the thermostat. Then open a TIPS case and request the tool you will need. Document and upload pictures from the thermostat inspection along with a CUL and IQT. In your request include a contact name, phone number, and shipping address for the tool to be sent. Before the tool arrives: • Remove and replace the coolant expansion tank \(reservoir\) and the main radiator. • Without removing the components: flush the heater core and changeover valve \(located in the right front wheel arch\) in the opposite direction of flow until no debris remains. Once the tool arrives, proceed with flushing the vehicle per the instructions attached in this LI. A picture of the filter after each flush must be taken. If after the prescribed number of flushing attempts debris is still being collected in the filter, upload all the pictures to the TIPS case and wait for next steps. A scale of not\-acceptable to acceptable debris level in the filter is in the attachments for you to make an assessment as well.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11013331-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11013331-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2023 to 2024 MERCEDES\-BENZ AMG C43
- 2020 to 2024 MERCEDES\-BENZ AMG CLA45
- 2021 to 2023 MERCEDES\-BENZ AMG GLA45

JSON: [/v1/bulletins/11013331](/v1/bulletins/11013331)

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