Valeo 439678 Alternator

Valeo 439678 Alternator for Mercedes-Benz

The Valeo 439678 alternator is a 12-volt, 120-amp charging component built for select Mercedes-Benz applications. It uses an internal fan, internal regulator, and clockwise rotation to support stable electrical output in vehicles equipped with a serpentine belt drive.

Key Features

• 12-volt alternator with 120-amp amperage rating
• Internal fan and internal regulator
• Clockwise rotation direction
• 6-groove pulley for serpentine belt systems
• Aluminium housing for OE-style fit and durability
• Valeo OE family alternator
• Technical number: TG12C063

Product Details

Valeo has supplied original equipment electrical systems since 1923, and the 439678 alternator reflects that OE-focused design approach. This alternator is a 100% new unit, which helps reduce the risk associated with remanufactured components. It is engineered for Mercedes-Benz C250 and Mercedes-Benz SLK250 models from 2012 through 2015, making it a direct-fit choice for drivers searching for a Mercedes-Benz C250 alternator or Mercedes-Benz SLK250 charging system replacement. This part cross-references Anchor 10191 and BBB Industries 11098 for the same application.

Common Issues This Part Can Address

• Battery warning light caused by weak charging output
• Dim headlights or unstable electrical performance
• Battery not maintaining charge during normal driving
• Charging system noise related to alternator wear
• Voltage drop affecting vehicle electronics

Installation Notes and Tips

Verify pulley groove count, rotation direction, amperage rating, and connector match before installation. Confirm the vehicle uses a serpentine belt setup and compare the original alternator’s technical number TG12C063 when checking the replacement. For best results, inspect the belt, tensioner, and battery condition during alternator service.

Quality Assurance

Valeo is a long-standing OE supplier in electrical systems, and this alternator is part of the Valeo OE line. Its 100% new construction and OE-oriented specifications support consistent charging performance in the listed Mercedes-Benz applications.