Dorman 300-862 Alternator Pulley

Alternator Pulley for Mercedes-Benz Applications

The Dorman 300-862 alternator pulley is a direct-fit replacement for specified Mercedes-Benz charging system applications. Built with a steel contact surface and black finish, it matches the original pulley’s fit and function for dependable alternator operation.

• Brand: Dorman
• Part number: 300-862
• Serpentine alternator pulley design
• Bolt-on attachment type
• Outside diameter: 2.17 in.
• Bore size: 0.67 in.
• Steel contact surface material
• Black finish
• OE-style replacement for specified Mercedes-Benz E350, R350, Sprinter 2500, Sprinter 3500, GL350, E320, GL320, ML320, and R320 applications

Fitment and Cross Reference

Compatible with select Mercedes-Benz models from 2007-2013, including Fits 2011-2013 Mercedes-Benz E350, N/A; Fits 2010-2013 Mercedes-Benz R350, N/A; Fits 2010-2013 Mercedes-Benz Sprinter 2500, N/A; Fits 2010-2013 Mercedes-Benz Sprinter 3500, N/A; Fits 2010-2012 Mercedes-Benz GL350, N/A; Fits 2007-2009 Mercedes-Benz E320, N/A; Fits 2007-2009 Mercedes-Benz GL320, N/A; Fits 2007-2009 Mercedes-Benz ML320, N/A; and Fits 2007-2009 Mercedes-Benz R320, N/A. This part cross-references Dayco 892015 for the same application.

Detailed Description

Dorman 300-862 is an alternator pulley engineered to match the original pulley on listed Mercedes-Benz vehicles. The serpentine-style, bolt-on design supports proper belt routing and alternator drive function, while the steel contact surface is selected for durability in charging system service. Use this pulley when replacing a worn or damaged alternator pulley on Mercedes-Benz E350, R350, Sprinter 2500, Sprinter 3500, GL350, E320, GL320, ML320, or R320 models within the confirmed fitment range.

What It Helps Fix

• Alternator pulley wear that can affect belt drive performance
• Noise from a damaged or rough-running pulley surface
• Improper alternator belt engagement on serpentine systems
• Charging system issues caused by pulley damage or mismatch
• Fitment problems when replacing the original Mercedes-Benz pulley

Installation Notes and Tips

Verify the pulley style, outside diameter, and bore size against the original part before installation. This pulley uses a bolt-on attachment and does not include installation hardware. Confirm serpentine belt routing and alternator condition during service to avoid repeat repairs.

Quality Assurance

Dorman manufactures this alternator pulley to match the fit and function of the original component on specified applications. It is built from quality materials for reliable performance and durability in everyday use.