KNOWN FAULT · Mercedes-Benz

Loss of drive from the high-voltage starter-alternator control unit (AMG 63 S E Performance)

Sources are not verified in real time and no entry confirms that your car is affected.

Engine / equipment: Mercedes-AMG 63 S E Performance plug-in hybrids: GT 4-door, S 63, SL 63, GLC 63 and AMG GT
Period mentioned: 2023–2025
Symptoms: Hybrid-system fault warnings and sudden loss of drive.
Possible cause described: A software error may make the high-voltage starter-alternator control unit fail, leaving the car without drive. US recall 25V-129 (2,943 cars; on the GT 4-door, model years 2023–2024): the unit’s software is updated.
Check for the garage: Ask by VIN at a Mercedes dealer whether the starter-alternator unit software has been updated.
Cost cited in the source: Free under the recall.A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Anonymous answer, no personal data.

How much does it cost to repair this fault?

Free under the recall.

A rough figure from the original database, not an up-to-date quote.

How is it checked?

Ask by VIN at a Mercedes dealer whether the starter-alternator unit software has been updated.

What are the symptoms?

Hybrid-system fault warnings and sudden loss of drive.

Which cars and years does it affect?

Brands: Mercedes-Benz
Engine / equipment: Mercedes-AMG 63 S E Performance plug-in hybrids: GT 4-door, S 63, SL 63, GLC 63 and AMG GT
Period mentioned: 2023–2025

Find garages near you and, before you say yes, check whether the quote is reasonable.

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