Mercedes R172 W204 W205 W213 M276 Engine Auxiliary Belt Tensioner A2762000370

Mercedes R172 W204 W205 W213 M276 Engine Auxiliary Belt Tensioner is an original engine auxiliary system component designed for M276 petrol engines in selected Mercedes models. Thanks to its precise construction and compliance with manufacturer specifications, it ensures stable routing of the auxiliary belt, which translates into reliable operation of the alternator, pump, and other components, as well as the reduction of unwanted vibrations. This is the solution for users who expect consistency with factory Mercedes standards and wish to maintain the original engine performance characteristics.

Specifications and technical data

• SKU: A2762000370-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2762000370
• Substitutable numbers: A2762000370, A 276 200 03 70
• Fuel type: Petrol
• Category: Idlers & Tensioners

Purpose and role in the auxiliary drive system

The belt tensioner in the M276 petrol engine is responsible for maintaining the correct tension of the multi-ribbed belt that drives key auxiliary components. A properly functioning tensioner:

• stabilizes belt travel at varying engine speeds,
• reduces slippage and noise resulting from improper tension,
• decreases the load on the alternator bearings and other units,
• helps maintain smooth operation of the auxiliary drive system.

In Mercedes M276 family petrol engines, the correct selection of the tensioner is important for engine refinement, especially at higher RPMs and during dynamic driving.

Compatibility with Mercedes models

The presented tensioner is intended for use in selected Mercedes models with the M276 engine, such as the R172, W204, W205, or W213. Using a component that complies with factory specifications allows for maintaining:

• correct belt routing geometry,
• compatibility with original pulleys and idler rollers,
• consistency with factory service procedures.

As a result, the tensioner meets the manufacturer's requirements for the auxiliary drive system in petrol engines, which is significant both during standard operation and under higher thermal loads.

Technical category: Tensioner and idler pulleys

The item belongs to the Tensioner and idler pulleys group, which are components responsible for guiding and tensioning the belt in the auxiliary system. In practice, this means that the tensioner works in conjunction with guide and idler rollers to create a complete belt path. The proper condition of these elements affects:

• even belt load along its entire length,
• reduction of the risk of slipping or snapping,
• limitation of vibrations transmitted to engine accessories.

Selecting a tensioner from the same design group as other belt routing components facilitates maintenance and allows for predictable system behavior over a long period of operation.

Product characteristics and service application

The offered belt tensioner is a Mercedes brand part, which for many users means maintaining consistency with factory build quality and performance parameters. The product is in used condition, which should be taken into account when planning the scope of service work and potential verification before installation. In practice, such an element can be used as:

• a replacement for a damaged or worn tensioner in an M276 petrol engine,
• a part used during comprehensive maintenance of the auxiliary belt system,
• an element helpful in restoring the original configuration of the power unit.

For workshops specializing in the Mercedes brand, using an original tensioner facilitates the maintenance of repeatable installation procedures and predictable service results.

Service expansion within the tensioning system

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional guide pulleys, idler rollers, or components working with the auxiliary belt, check the available parts in the Mercedes tensioner and idler pulleys category.