# Service bulletin LI54.21\-P\-076055

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: 10233788
- Published by NHTSA: 2023\-04\-05
- Manufacturer's number: LI54.21\-P\-076055
- Manufacturer's date: 2023\-03\-15
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Complaint Check engine light activated Fault codes stored in AMG Drive Unit N145/1 \(DRVU3\) B1F9713 U015400 U188D00 Cause Timing variance on wakeup of ethernet control units Remedy A solution is in development for listed faults in AMG drive unit \(DRVU3\). Clear fault codes and perform 2 drive cycles allowing vehicle to sleep in between drives. If no fault codes or malfunctions occur, the vehicle can be released to the owner. Note: These fault codes will not lead to other malfunctions or damage to the vehicle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233788-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233788-9999.pdf)

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

## Components

Engine

## Trouble codes named

B1F97, U0154, U188D

## Vehicles listed

- 2023 MERCEDES\-BENZ AMG C43
- 2023 MERCEDES\-BENZ C 300
- 2023 MERCEDES\-BENZ S 500
- 2023 MERCEDES\-BENZ S 580 E
- 2023 MERCEDES\-MAYBACH S 580 4MATIC

JSON: [/v1/bulletins/10233788](/v1/bulletins/10233788)

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