Dorman 300-862 Alternator Pulley

Reliable Alternator Pulley for Select Mercedes-Benz Models

The Dorman 300-862 alternator pulley is designed to provide consistent performance for your Mercedes-Benz vehicle. Engineered with precision, this serpentine alternator pulley ensures proper belt alignment and smooth operation for models including the E320, E350, GL320, GL350, ML320, R320, R350, Sprinter 2500, and Sprinter 3500.

Key Features of the Dorman 300-862 Alternator Pulley

• Finish: Durable black coating for corrosion resistance
• Attachment Type: Bolt-on design for secure installation
• Outside Diameter: 2.17 inches, matching OEM specifications
• Type: Serpentine pulley compatible with factory belt systems
• Contact Surface Material: Steel for enhanced durability and wear resistance
• Bore Size: 0.67 inches for precise fitment
• Flanged End: No flange, designed for specific alternator models
• Installation Hardware: Not included, uses existing hardware
• Package Contents: Includes one alternator pulley

Detailed Product Description

The Dorman 300-862 alternator pulley is crafted to meet the exacting standards required for Mercedes-Benz electrical systems. Its bolt-on attachment type allows for straightforward replacement without the need for specialized tools. The serpentine design supports the factory belt routing, ensuring optimal tension and reducing the risk of belt slippage. Constructed with a steel contact surface, this pulley offers reliable wear resistance under normal operating conditions. The 2.17-inch outside diameter and 0.67-inch bore size are engineered to fit alternators on a range of Mercedes-Benz models, including the E320, E350, GL320, GL350, ML320, R320, R350, Sprinter 2500, and Sprinter 3500.

Common Applications and Issues Addressed

• Replacement for worn or damaged alternator pulleys causing belt noise or slippage
• Restores proper belt alignment to prevent premature belt wear
• Eliminates alternator pulley wobble that can affect charging system performance
• Addresses pulley surface wear that can lead to belt damage
• Supports maintenance of the serpentine belt system on compatible Mercedes-Benz vehicles

Installation Notes and Tips

Installation of the Dorman 300-862 alternator pulley requires removal of the old pulley using appropriate tools. Since installation hardware is not included, retain existing bolts and fasteners. Ensure the serpentine belt is properly routed and tensioned after pulley replacement. It is recommended to inspect the belt and related components during installation to confirm overall system integrity.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 300-862 alternator pulley undergoes quality checks to ensure durability and reliable performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.