Vaico V30-3120 Accessory Drive Belt Idler Pulley

Accessory Drive Belt Idler Pulley for Mercedes-Benz

Restore proper accessory belt routing and tension control with the VAICO V30-3120 accessory drive belt idler pulley. Built with a Polyamid 6.6 pulley body and precise dimensions, this smooth idler pulley is specified for a range of Mercedes-Benz V6 and V8 applications, including C300, E350, ML350, and GL550 models.

VAICO focuses on OE-style replacement parts for European vehicles, and the VAICO line is used for direct-fit service components that match the original application requirements. The V30-3120 is a practical choice when servicing the accessory drive belt system on Mercedes-Benz and Dodge Sprinter platforms.

Key Features

• Accessory drive belt idler pulley for belt routing and support
• Polyamid 6.6 construction for the pulley body
• Outer diameter: 70 mm
• Width: 78 mm
• Length: 78 mm
• Height: 29 mm
• Inner diameter: 8 mm
• Smooth pulley surface for accessory belt operation
• VAICO V30-3120 for OE-style replacement service

Detailed Description

The VAICO V30-3120 accessory drive belt idler pulley is engineered for vehicles that rely on a stable serpentine belt path to drive engine accessories. Its 70 mm outer diameter, 8 mm inner diameter, and 78 mm width provide the dimensional fit needed for the specified applications, while the Polyamid 6.6 material supports durable everyday service in the belt drive system. This part cross-references OE-style numbers such as 68020889AA and A2722020419 for the same application. Compatible With Mercedes-Benz C300, E350, ML350, GL450, GL550, S550, SL550, CLS550, CLK550, and Dodge Sprinter 2500/Sprinter 3500 applications listed below. The V30-3120 is a direct replacement option for drivers addressing belt alignment and pulley wear on Mercedes-Benz and Dodge Sprinter platforms.

What This Part Helps Address

• Accessory belt noise caused by a worn idler pulley surface
• Belt tracking issues from pulley wear or bearing-related drag
• Visible pulley damage, cracking, or material fatigue
• Uneven accessory belt operation in the drive belt system
• Service replacement for high-mileage Mercedes-Benz belt drive components

Installation Notes and Tips

• Verify the OE number and pulley dimensions before installation.
• Inspect the accessory belt, tensioner, and adjacent pulleys during service.
• Confirm smooth pulley rotation and proper belt alignment after installation.
• Use the fitment notes to match the exact vehicle build and engine application.
• Fits 2008-2012 Mercedes-Benz C300, N/A.
• Fits 2007-2011 Mercedes-Benz E350, N/A.
• Fits 2007-2011 Mercedes-Benz ML350, N/A.
• Fits 2007-2008 Dodge Sprinter 2500, N/A.
• Fits 2007-2008 Dodge Sprinter 3500, N/A.

Quality Assurance

VAICO replacement components are produced for European vehicle service applications with attention to OE-style fit and dimensional accuracy. The V30-3120 is listed with multiple OE cross-references and broad Mercedes-Benz coverage, supporting confident parts matching for accessory drive belt system repairs.