Dorman 419-686 Accessory Drive Belt Idler Pulley - Grooved Pulley, Right or Upper

Durable Accessory Drive Belt Idler Pulley for Mercedes-Benz

The Dorman 419-686 accessory drive belt idler pulley is engineered to maintain proper tension and alignment of the serpentine belt system in select Mercedes-Benz models. Designed with precision, this black plastic pulley ensures reliable operation for vehicles such as the C250, E350, and GL450.

Key Features of Dorman 419-686 Idler Pulley

• Constructed from durable black plastic material for corrosion resistance
• Measures 62 mm outside diameter with a 12 mm inside diameter
• Equipped with 6 grooves to accommodate serpentine belts
• Includes mounting hardware: 1 bolt and 1 dust shield for secure installation
• Standard grade type with a 1.1 mm material thickness for consistent performance
• Single mounting hole and one pulley bearing with 12 mm width for smooth rotation
• Specific fitment designed for various Mercedes-Benz models

Detailed Product Description

The Dorman 419-686 accessory drive belt idler pulley is specifically designed to fit a range of Mercedes-Benz vehicles including the C300, CLK350, ML550, and SLK350. Its plastic construction offers a balance of strength and lightweight performance, reducing wear on the serpentine belt system. The pulley features six grooves to properly guide the serpentine belt, ensuring optimal tension and alignment. With an outside diameter of 62 mm and a width between 23.1 mm and 25.2 mm, this pulley fits precisely within the accessory drive belt system. The included mounting hardware and dust shield simplify installation and protect the bearing from contaminants, extending the service life of the component.

Common Applications and Issues Addressed

• Restores proper serpentine belt tension and alignment
• Eliminates belt slippage and squealing noises
• Prevents premature belt wear caused by misaligned pulleys
• Replaces worn or damaged idler pulleys in Mercedes-Benz accessory drive systems
• Helps maintain smooth operation of engine accessories such as alternator and power steering pump

Installation Notes and Tips

• Ensure vehicle compatibility by verifying fitment with Mercedes-Benz models like the E550, GLK350, and CLS550
• Use the included bolt and dust shield for secure and clean installation
• Inspect the serpentine belt for wear and replace if necessary during installation
• Follow manufacturer torque specifications to avoid over-tightening
• Check pulley alignment after installation to prevent belt damage

Quality Assurance and Warranty

Dorman manufactures the 419-686 accessory drive belt idler pulley to meet or exceed OEM standards for fit, form, and function. The part undergoes rigorous quality control to ensure durability and reliable performance in Mercedes-Benz vehicles. This pulley comes with a limited warranty covering defects in material and workmanship, providing confidence in its long-term use.