Service bulletin LI54.10-P-078888
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 | 11023938 |
| Published by NHTSA | 2025-10-06 |
| Manufacturer's number | LI54.10-P-078888 |
| Manufacturer's date | 2025-10-06 |
| NHTSA component | ELECTRICAL SYSTEM |
NHTSA's summary
Complaint The check engine light illuminates or the 48 V message is displayed in the instrument cluster Cause Fault code "P0A7F00" stored in the 48 V battery G1/3 and/or is current. Remedy Update the 48V battery to SW 25/12 A0019020424 Then perform the following measures: - Switch on ignition - Read out actual value 209 in XENTRY Diagnosis for G1/3 (48 V battery) "State of Health Capacity-SOHC" -- If the value > 80% doesn't require a healing process -- If the value is < 80%, continue with the following steps Carry out capacity healing procedures: - Discharge 48 V battery in vehicle with ignition "On" and check the SOC of the 48 V battery in the workshop menu of the instrument cluster - At SOC <30%: Stop discharge and lock vehicle - with key out of range; (Bus idle) -Charging the 48V battery - When SOC reaches or exceeds 70%, stop charging and lock the vehicle with the key out of range; (bus idle) - After 1.5h bus idle: Switch on ignition Read out actual value 209 in XENTRY Diagnosis in the G1/3 (48 V battery) "State of Health Capacity-SOHC" - SOH > 90%: Procedure is finished and fault memory erased - SOH < 90%: Repeat the steps again. If the value is still too low after 5 repetitions: Abort healing process and open a TIPS case.
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
Electrical system
Trouble codes named
P0A7F
| MERCEDES-BENZ A 220 | 2019 to 2022 |
|---|---|
| MERCEDES-BENZ AMG A35 | 2020 to 2021 |
| MERCEDES-BENZ AMG CLA35 | 2020 to 2024 |
| MERCEDES-BENZ AMG CLA45 | 2020 to 2024 |
| MERCEDES-BENZ AMG GLA 35 | 2024 to 2025 |
| MERCEDES-BENZ AMG GLA 35 4MATIC | 2024 |
| MERCEDES-BENZ AMG GLA 45S | 2024 |
| MERCEDES-BENZ AMG GLA35 | 2021 to 2023 |
| MERCEDES-BENZ AMG GLA45 | 2020 to 2023 |
| MERCEDES-BENZ CLA 250 | 2020 to 2025 |
| MERCEDES-BENZ CLA 250+ (EV) | 2026 |
| MERCEDES-BENZ GLA 250 | 2021 to 2025 |
| MERCEDES-BENZ GLA 250 4MATIC | 2024 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.