# Service bulletin Ll54.10\-P\-076823

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: 10241510
- Published by NHTSA: 2023\-09\-01
- Manufacturer's number: Ll54.10\-P\-076823
- Manufacturer's date: 2023\-08\-22
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may sporadically be displayed. As a consequence of this, the fault codes B 1 FCB97 \(=\> N73/3\) and U 116000 \(=\> N73/3\*1\) are stored in the fault memory. In the subsequent analysis of the 12 Von\-board electrical system data, the following parameters are conspicuous \(see picture 1 in the attachment\): • Charge balance negative when stationary. • Interior CAN bus is awake for an unusually long time. • 12 V battery SOC \(state of charge\) during subsequent engine start is 45% or less. NOTE: Once the 12 V battery SOC has exceeded 50% for the first time, the symbol and the message in the instrument cluster disappear again. The door control unit \(N69/x\) may sporadically keep the interior CAN bus awake. NOTE: Exclusively door control units with the HW item numbers A2239019917 and A2239010018 can be affected. Open a TIPS case and include the following: 1. Initial Quick Test 2. N73/3 EZS CUL 3. N73/3\*1 EZS CUL 4. Date and time of occurrence

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241510-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241510-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2022 to 2024 MERCEDES\-BENZ AMG C43
- 2022 to 2023 MERCEDES\-BENZ AMG C63 S
- 2023 MERCEDES\-BENZ AMG C63 S E
- 2023 to 2024 MERCEDES\-BENZ AMG GLC43
- 2023 MERCEDES\-BENZ AMG GLC63 S
- 2024 MERCEDES\-BENZ AMG GLC63 S E
- 2022 to 2024 MERCEDES\-BENZ C 300
- 2023 to 2024 MERCEDES\-BENZ GLC 300

JSON: [/v1/bulletins/10241510](/v1/bulletins/10241510)

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