# Service bulletin LI20.00\-P\-076708

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: 11012910
- Published by NHTSA: 2025\-01\-17
- Manufacturer's number: LI20.00\-P\-076708
- Manufacturer's date: 2025\-01\-17
- NHTSA component: ENGINE

## NHTSA's summary

Complaint Check engine lamp activated, coolant warning message, and engine fan running at full speed. Below fault codes stored in N127 PTCU related to LIN network components. U063200, U063287, U02A900, U02A987, U0698E4, U0698E5, U02C800, U02C887, U063B00, U063B87 Cause Under analysis. Remedy Disconnect 12V battery and leave for 20 minutes. Reconnect battery and clear fault codes. Perform 2 test drives, with at least 5 minutes in between with ignition off. If vehicle operates normally, it can be released to the owner. Software solution is in development for PTCU variant 22A. If complaint occurs in vehicle with PTCU version later that 22A please check the following: \-Check connections at all LIN bus components connected to N127 PTCU for damage, corrosion, or poor connection \-Check wiring between LIN bus components and N127 for damage or chaffing \-Inspect intermediate connections between LIN bus components and N127 for damage, corrosion, or poor connection

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11012910-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11012910-9999.pdf)

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

## Components

Engine

## Trouble codes named

U02A9, U02C8, U0632, U063B, U0698

## Vehicles listed

- 2023 to 2024 MERCEDES\-BENZ GLC 300
- 2024 MERCEDES\-BENZ GLC 300 COUPE
- 2024 MERCEDES\-BENZ GLE 350
- 2025 MERCEDES\-BENZ GLE 350 4MATIC
- 2024 to 2025 MERCEDES\-BENZ GLE 450E 4MATIC

JSON: [/v1/bulletins/11012910](/v1/bulletins/11012910)

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