Valeo 439679 Alternator

Valeo 439679 Alternator for Mercedes-Benz C250

The Valeo 439679 alternator is a 12-volt, 150-amp charging unit built for select Mercedes-Benz C250 applications. As part of the Valeo OE alternator line, it uses an internal fan, internal regulator, and clockwise rotation to match the original charging system layout.

Valeo has supplied original equipment electrical components since 1923, and this premium alternator is 100% new. That helps reduce the risk associated with remanufactured units while supporting stable charging performance in Mercedes-Benz C250 models from 2012-2015.

Key Features

• Part number: 439679
• 12-volt alternator with 150-amp output
• Internal fan and internal voltage regulator
• Clockwise rotation
• Single-groove pulley for serpentine belt systems
• Aluminium housing for OE-style fit and durability
• Valeo OE family alternator for select Mercedes-Benz charging systems

Product Details

This Valeo alternator is engineered for Mercedes-Benz C250 charging system service where OE-style electrical output and fitment matter. The 150-amp rating supports vehicle electrical demand, while the internal regulator and internal fan reflect the original equipment design used on the listed applications. The Valeo 439679 also cross-references WAI 11822N for the same application.

Compatible With 2013-2015 Mercedes-Benz C250, N/A. Compatible With 2012 Mercedes-Benz C250, N/A, for vehicles built to chassis/VIN F905165 or A743679, including Bremen Plant and Sindelfingen Plant configurations noted in the fitment data. The part number 439679 is also identified by technical number FG15T036.

Common Problems This Part Can Address

• Battery warning light caused by alternator output loss
• Low charging voltage during driving or idle conditions
• Electrical system instability from a failing alternator
• Dim lights or accessory performance issues related to weak charging
• Charging concerns on Mercedes-Benz C250 models with OE Valeo equipment

Installation Notes and Tips

Verify the vehicle’s chassis/VIN breakpoints, plant build notes, and pulley configuration before ordering. Confirm the 12-volt system, 150-amp specification, clockwise rotation, and single-groove serpentine pulley match the original unit. Inspect the belt, electrical connectors, and charging circuit condition during replacement to help avoid repeat failures.

Quality Assurance

Valeo is a long-standing OE supplier in electrical systems, and this alternator is supplied as a new unit rather than a remanufactured part. That OE-focused construction supports consistent charging performance for select Mercedes-Benz C250 applications.