# Service bulletin LI54.10\-P\-077250

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: 11011846
- Published by NHTSA: 2024\-12\-16
- Manufacturer's number: LI54.10\-P\-077250
- Manufacturer's date: 2024\-12\-11
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Complaint Customer states CEL is on. Cause Quick test shows FC P0A7F00 The state of health limit of the hybrid/high\-voltage battery module has been reached. No drivability concerns occurred and vehicle drives as normal. Remedy Do not replace any parts\!\! 254: SW has been released. Ensure all Add\-ons are installed. Update A66 with the latest SW A 000 903 51 75 MY24 206: SW has been released. Ensure all Add\-ons are installed. Update A66 with the latest SW A 000 903 52 75 After SW has been updated, perform the following reset procedure: Step 1: Read the State of Health Resistance \- \(SOH\-R\) Step 2: If SOH\-R \<=125%: Clear fault memory in PTCU\(N127\) and 48V battery \(A66\). Procedure finished. If SOH \> 125%: Drive for a duration of 60 minutes to retrain the SOH\-R value. Step 3: Read the State of Health Resistance \- \(SOH\-R\) If SOH\-R \<=125%: Clear fault memory in PTCU\(N127\) and 48V battery \(A66\). Procedure finished. If SOH \> 125%: Park vehicle in Workshop for \>12 hours in warm ambient temperature \>60F, afterwards drive for a duration of 60 minutes. Step 4: Read the State of Health Resistance \- \(SOH\-R\) If SOH\-R \<=125%: Clear fault memory in PTCU\(N127\) and 48V battery \(A66\). Procedure finished. If SOH\-R is still \>125%, open a TIPS case.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11011846-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11011846-9999.pdf)

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

## Components

Electrical system

## Trouble codes named

P0A7F

## Vehicles listed

- 2024 MERCEDES\-BENZ AMG C43
- 2024 MERCEDES\-BENZ AMG C63 S E
- 2016 to 2024 MERCEDES\-BENZ AMG GLC43
- 2018 to 2022 MERCEDES\-BENZ AMG GLC63
- 2020 to 2023 MERCEDES\-BENZ AMG GLC63 S
- 2024 MERCEDES\-BENZ AMG GLC63 S E
- 2018 to 2019 MERCEDES\-BENZ AMG GLC63S
- 2024 MERCEDES\-BENZ C 300
- 2016 MERCEDES\-BENZ GLC
- 2018 to 2024 MERCEDES\-BENZ GLC 300
- 2024 MERCEDES\-BENZ GLC 300 COUPE
- 2018 to 2020 MERCEDES\-BENZ GLC 350
- 2018 MERCEDES\-BENZ GLC 350 E
- 2020 to 2021 MERCEDES\-BENZ GLC 350 E
- 2025 MERCEDES\-BENZ GLC 350 E 4MATIC
- 2016 to 2017 MERCEDES\-BENZ GLC300
- 2019 MERCEDES\-BENZ GLC350E

JSON: [/v1/bulletins/11011846](/v1/bulletins/11011846)

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