Mercedes C204 Belt Tensioner M276 A2762000170

Mercedes C204 Belt Tensioner M276 is a component from the Tensioners and pulleys group, responsible for the stable guidance of the belt in the engine accessory drive system. A properly selected tensioner ensures correct belt tension, reduces slippage, and supports the smooth operation of components driven by the V-belt.

Specifications and technical data

• SKU: A2762000170-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2762000170
• Substitutable numbers: A2762000170, A 276 200 01 70
• Part type: Timing Chain Tensioner
• Category: Tensioners & Pulleys

Purpose and function in the accessory drive system

The V-belt tensioner in the M276 unit is responsible for maintaining proper belt tension across a wide range of loads and rotational speeds. It stabilizes the belt's path, which translates into correct interaction with pulleys and reduces the risk of noise, vibrations, and premature wear of accessories.

A properly functioning tensioner helps maintain:

• smooth torque transmission to engine accessories,
• reduction of unwanted vibrations in the belt system,
• more even wear of the V-belt.

Technical characteristics and fitment

The tensioner from this series has been designed specifically for use with the M276 engine in the C204 body, maintaining factory operating parameters. The design features a precisely selected spring characteristic and arm geometry, which allows for maintaining belt tension within the range specified by the vehicle manufacturer.

Thanks to the use of an original Mercedes solution, the factory position of the belt relative to the guide pulleys and belt pulleys is maintained, which facilitates installation and subsequent system condition checks. A used component of this class is a good choice for service when maintaining compliance with factory specifications is desired, without the need to use replacements with uncertain parameters.

Component condition and installation aspects

The offered tensioner comes from the used parts group, which allows for economical repair while maintaining the original design. Before installation, a standard visual inspection, verification of the arm's operation under load, and assessment of the surfaces interacting with the belt are recommended.

During replacement, it is worth paying attention to:

• correct belt routing over all pulleys,
• tightening torque of fasteners in accordance with service documentation,
• the potential need for simultaneous replacement of the V-belt if it shows signs of wear.

Benefits of using an original tensioner

Using a tensioner dedicated to the M276 unit in the C204 body supports the stable operation of the accessory drive system and reduces the risk of failures resulting from improper belt tension. The original design ensures predictable behavior under load, which is especially important in higher-power engines where the belt system operates under varied conditions.

Selecting the component by OEM number and interchangeable numbers allows for precise matching of the part to a specific vehicle configuration. If you want to organize the selection process and verify compliance with documentation, the article Guide: how to choose the right car part by VIN and OEM number will be helpful, where you will find practical tips and a checklist for talking to the seller.

Related items from the same group

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional tensioners, guide pulleys, or idler pulleys, check the available parts in the Mercedes Tensioners and pulleys category.