Valeo 439823 Alternator

Valeo 439823 Alternator for Mercedes-Benz

The Valeo 439823 alternator is a 12-volt, 180-amp charging component built for select Mercedes-Benz applications. As part of the Valeo OE family, it uses an internal fan, clockwise rotation, a 6-groove pulley, and an aluminum housing for a direct-fit replacement focused on stable electrical output.

Valeo’s alternator line is rooted in original equipment supply and electrical system engineering. This premium alternator is supplied as a 100% new unit, helping reduce the risk associated with remanufactured components and supporting consistent charging performance on Mercedes-Benz CLS550, E550, CL550, and S550 models.

• 12-volt alternator with 180-amp output
• Internal fan design for integrated cooling
• Clockwise rotation direction
• 6-groove pulley configuration
• Aluminum housing construction
• Valeo OE family replacement
• Technical number: FGN18S110

Detailed Product Overview

Valeo 439823 is an OE-style alternator engineered for Mercedes-Benz charging systems that require a 180-amp unit. It is listed for 2012-2013 Mercedes-Benz S550, 2012 and 2013-2018 Mercedes-Benz CLS550, 2012 and 2013-2017 Mercedes-Benz E550, and 2014 Mercedes-Benz CL550. This part cross-references BBB Industries (e.g., 11100, 11808) for the same application.

Use this alternator when you need a replacement that matches the vehicle’s electrical requirements and pulley configuration. The part number 439823 is also associated with OE interchange references including 0009068601 and 906860180.

Common Issues This Part May Resolve

• Battery warning light caused by low charging output
• Dim lights or unstable electrical performance
• Battery not maintaining charge during normal driving
• Charging system faults related to alternator wear
• Noise or failure from an aging alternator assembly

Installation Notes and Tips

Verify the vehicle’s build date and charging system specifications before installation, especially for 2012 Mercedes-Benz CLS550 and E550 models noted as from 06/12/12. Confirm pulley groove count, rotation direction, and amperage rating match the original unit. Inspect the belt, tensioner, and electrical connections during replacement to help ensure proper charging system operation.

Quality Assurance

Valeo has supplied electrical system components since 1923 and is recognized as an original equipment alternator supplier. The 439823 alternator is a new unit, not a remanufactured part, and is built to support dependable charging performance in Mercedes-Benz applications.