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Mercedes-Benz software error may cause the high-voltage starter alternator control unit to fail, causing a loss of drive power.

NHTSA campaign 25V-129 · Reported February 28, 2025 · 2,943 vehicles affected

AFFECTED MODELS
Mercedes-Benz AMG GT, GLC-Class, S-Class and SL-Class
VEHICLES AFFECTED
2,943
REMEDY
Dealers will update the high-voltage starter alternator control unit software, free of charge.
COST
Free

The short version

Mercedes-Benz USA, LLC reported a problem with the electrical system propulsion system. Here is what owners need to know.

WHAT

A software error may cause the high-voltage starter alternator control unit to fail, causing a loss of drive power.

WHY IT MATTERS

A loss of drive power increases the risk of a crash.

WHAT TO DO

Take it to a dealer — they will update the high-voltage starter alternator control unit software, free of charge.

Affected vehicles

These model years are included in NHTSA campaign 25V-129.

YEAR RANGEMODEL
2023–2025Mercedes-Benz AMG GT
2025Mercedes-Benz GLC-Class
2025Mercedes-Benz S-Class
2024–2025Mercedes-Benz SL-Class

What changed

Newest first. The record shows both when the recall began and what has changed since.

  1. Recall expanded to more vehicles. LATEST
  2. Recall reported to NHTSA.

Drive one of these? Check your VIN to see if your specific vehicle is affected.

Check your VIN

What this record means

Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.

Not affiliated

MyAutoRecalls is not affiliated with Mercedes-Benz USA, LLC or the National Highway Traffic Safety Administration.