Gates 39194 Accessory Drive Belt Tensioner Assembly

Reliable Automatic Belt Tensioner for Mercedes-Benz Vehicles

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 39194) is engineered to maintain optimal tension on the accessory drive belt system. Designed specifically for a range of Mercedes-Benz models, this thermoplastic tensioner assembly ensures consistent belt performance and longevity.

• Constructed from durable thermoplastic material for long-lasting use
• Compatible with V-ribbed belt types commonly used in Mercedes-Benz vehicles
• Features a smooth backside contact surface to reduce belt wear
• Includes one pulley with a 2.56 inch (65 mm) outside diameter and 1.14 inch (29 mm) width
• Two mounting holes for secure installation
• OE exact fit and performance for precise replacement

About the DriveAlign Premium OE Automatic Belt Tensioner Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates is designed to meet original equipment specifications, providing reliable belt tension control for accessory drive systems. This product line focuses on delivering precise fitment and consistent performance, reducing the risk of belt slippage or premature wear. Part number 39194 is part of this line, ensuring compatibility and durability for Mercedes-Benz models requiring an OE exact replacement tensioner.

Product Details and Specifications

This accessory drive belt tensioner assembly is made from thermoplastic, offering resistance to heat and wear. It features a single pulley without flanges, measuring 2.56 inches (65 mm) in outside diameter and 1.14 inches (29 mm) in width. The bearing bore inside diameter is 0.67 inches (17 mm), designed to accommodate the specific belt system requirements. The tensioner supports V-ribbed belts, which are standard in many Mercedes-Benz vehicles, ensuring smooth operation and reduced noise. With two mounting holes, installation is secure and stable.

Compatible Mercedes-Benz Models

• CL63 AMG, CL550
• CLS63 AMG, CLS63 AMG S, CLS550
• E63 AMG, E63 AMG S, E550
• G63 AMG, GL63 AMG, GL450, GL550
• GLE63 AMG, GLE63 AMG S, GLS63 AMG, GLS550
• Maybach S550
• ML63 AMG, ML550
• S63 AMG, S63L AMG, S550
• SL63 AMG, SL550
• SLK55 AMG

Common Issues Addressed by This Belt Tensioner

• Eliminates belt slippage caused by improper tension
• Prevents premature belt wear and cracking
• Reduces noise from loose or worn tensioners
• Maintains consistent accessory drive performance
• Helps avoid engine overheating due to belt failure

Installation Notes and Tips

Ensure the vehicle is off and cooled before beginning installation. Verify the part number 39194 matches the existing tensioner. Use appropriate tools to remove the old tensioner and install the new one securely using the two mounting holes. Confirm the V-ribbed belt is properly seated on the pulley with a smooth backside contact surface. After installation, inspect belt alignment and tension to ensure optimal operation.

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner is manufactured to meet original equipment standards, providing reliable performance and durability. This part is rated as an OE exact replacement, ensuring fit and function equivalent to factory components. While specific warranty details are not provided here, Gates products typically come with manufacturer-backed quality assurance to support your investment.