# 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: 11024266
- Published by NHTSA: 2025\-10\-14
- Manufacturer's number: LI20.10\-P\-076206
- Manufacturer's date: 2025\-10\-13
- NHTSA component: ENGINE

## NHTSA's summary

Complaint Customer states that the CEL is lit in the instrument cluster. Various codes may be active/stored: Stored in N3/10 in model series 206, 254 or 232: P012800 \- The coolant temperature is below the coolant thermostat specified temperature. and/or P01169D \- Malfunction in coolant temperature sensor 1. Under temperature in the component or system. For model series 177, 118, 247 in n3/10 \(only valid for M139.980 facelift \(code 9U8\)\): P2CEF00 \- Electrical fault or open circuit in coolant thermostat. and/or P011685 \- Malfunction in coolant temperature sensor 1. There is a signal above the permissible limit. Cause Debris in the coolant system Remedy An updated thermostat must be installed. Order the correct thermostat part number for your application: CLA45/GLA45 with SA Code 9U8: A 139 200 66 02 CLA45/GLA45 WITHOUT SA Code 9U8: A 139 200 27 02 All other M139 equipped vehicles: A 139 200 64 02 New screws must also be ordered and used when installing thermostat A 139 200 66 02 or A 139 200 64 02 PN N000000006341 \(qty 2\) will be used in place of the existing M8 screws. on the face of the thermostat. The new screws must be torqued to 8 Nm. Follow the instructions in WIS for removal and installation with the exception of the thermostat screw torque value mentioned previously. After replacement, fill and bleed the coolant system per the instructions in WIS for the model that is being worked on. QC the car on a test drive. If the complaint is remedied, release the vehicle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024266-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024266-9999.pdf)

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

## Components

Engine

## Trouble codes named

P0116, P0128, P2CEF

## Vehicles listed

- 2023 to 2024 MERCEDES\-BENZ AMG C43
- 2023 MERCEDES\-BENZ AMG C43 4MATIC
- 2020 to 2024 MERCEDES\-BENZ AMG CLA45
- 2021 to 2023 MERCEDES\-BENZ AMG GLA45

JSON: [/v1/bulletins/11024266](/v1/bulletins/11024266)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20LI20.10-P-076206&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11024266&vehicle=Service%20bulletin%20LI20.10-P-076206)