Dorman 419-037 Accessory Drive Belt Tensioner Assembly - Left or Lower

Overview of Dorman 419-037 Accessory Drive Belt Tensioner Assembly

The Dorman 419-037 accessory drive belt tensioner assembly is engineered for reliable performance in various Mercedes-Benz models. Designed specifically for V-belt systems, this tensioner assembly ensures proper belt tension and smooth operation of your vehicle's accessory drive components.

• Compatible with multiple Mercedes-Benz models including C55 AMG, E55 AMG, S63 AMG, and SLK55 AMG
• Features a single plastic pulley with a 40 mm bearing diameter for durability
• Designed for clockwise (CW) rotation to match factory specifications
• Includes one pulley bearing and no grooves, optimized for V-belt applications
• Dimensions: 17 mm inside diameter, 26 mm width, and 95 mm outside diameter

Technical Specifications and Design Details

This accessory drive belt tensioner assembly (part number 419-037) is built with a plastic pulley that houses a single bearing measuring 40 mm in diameter. The tensioner is designed to rotate clockwise, aligning with the original equipment manufacturer (OEM) requirements for Mercedes-Benz vehicles. Its V-belt compatibility and groove-free pulley design provide consistent belt tension and reduce wear on the belt and related components. The compact dimensions—17 mm inside diameter, 26 mm width, and 95 mm outside diameter—allow for precise fitment within the accessory drive system.

Compatible Mercedes-Benz Models

This Dorman tensioner assembly is compatible with a wide range of Mercedes-Benz vehicles, including but not limited to:

• C-Class models such as C55 AMG, C240, C320, and C350
• E-Class models including E55 AMG, E250, E300, E320, and E350
• S-Class models like S55 AMG, S63 AMG, S350, and S500
• Other models including CL55 AMG, CLS550, GL550, ML550, SLK55 AMG, and SLR McLaren

Common Applications and Problem Resolution

This accessory drive belt tensioner assembly addresses several common issues in Mercedes-Benz vehicles equipped with V-belt systems:

• Eliminates belt slippage caused by worn or weak tensioners
• Prevents premature belt wear and cracking
• Reduces noise from loose or misaligned belts
• Maintains proper accessory drive system performance
• Helps avoid overheating and accessory component failure

Installation Notes and Tips

When installing the Dorman 419-037 tensioner assembly, ensure the following:

• Verify clockwise rotation alignment with the vehicle’s original tensioner
• Inspect the V-belt for wear and replace if necessary to ensure optimal performance
• Use proper tools to avoid damaging the plastic pulley or bearing during installation
• Follow manufacturer torque specifications for mounting bolts
• Check belt tension after installation to confirm correct operation

Quality Assurance and Warranty Information

Dorman manufactures this accessory drive belt tensioner assembly to meet or exceed OEM standards for fit, form, and function. The part number 419-037 undergoes rigorous quality control to ensure durability and reliable performance in Mercedes-Benz vehicles. This product is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship under normal use.