Remy 12974 Alternator

Remanufactured Alternator for Mercedes-Benz V6 Charging Systems

The Remy Premium Remanufactured 12974 alternator is a 12-volt, 180-amp replacement built for select Mercedes-Benz applications using a Valeo unit. It includes an internal fan, internal voltage regulator, and pulley, making it a direct-fit charging system component for the listed ML320, R320, and GL320 models.

Key Features

• 180-amp amperage rating for high-output charging performance
• Remanufactured Premium Remanufactured unit from Remy
• OE manufacturer reference: Valeo
• 12-volt alternator with internal voltage regulator
• Internal fan design
• Pulley included
• Clockwise rotation
• Part number 12974 for easy identification

Product Details

Remy 12974 is a remanufactured alternator for Mercedes-Benz charging system service where a Valeo-style 180-amp unit is required. This part cross-references Mercedes-Benz OE numbers 642-154-03-02 and A642-154-03-02 for the same application. It is listed for 2007-2008 Mercedes-Benz ML320, 2007 Mercedes-Benz GL320, and 2007-2008 Mercedes-Benz R320, with the 2008 R320 note specifying applications built to 2/19/08. If you are searching for a Mercedes-Benz ML320 alternator 180 amp or a Mercedes-Benz R320 alternator replacement, this part number 12974 matches the documented fitment.

What It Helps Address

• Battery warning light caused by alternator output issues
• Low charging voltage during driving or idle
• Dim lights or electrical instability from weak charging performance
• Starting problems related to insufficient battery recharge
• Charging system failure on listed Mercedes-Benz ML320, R320, and GL320 vehicles

Installation Notes and Tips

Verify the vehicle’s original alternator specifications before installation, including 180-amp output, clockwise rotation, internal regulator, and pulley configuration. Confirm the exact model year and build date for 2008 R320 applications, since the fitment note applies to vehicles built to 2/19/08. Compare the existing unit and OE reference numbers before replacing the alternator to ensure the correct Mercedes-Benz charging system match.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to meet the application requirements of the original Valeo-based design. Part number 12974 is built as a remanufactured replacement for the specified Mercedes-Benz charging system applications.