Mercedes W213 C238 C253 Engines Auxiliary Belt Tensioner Pulley A2742001370

Mercedes W213 C238 C253 Engines Auxiliary Belt Tensioner Pulley is an original component from the Tensioner and idler pulleys group, designed for the timing system in modern Mercedes models. This used OEM part ensures factory-fit, stable belt guidance, and predictable timing drive performance during daily operation.

Specifications and technical data

• SKU: A2742001370
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742001370
• Substitutable numbers: A2742001370, A 274 200 13 70
• Category: Idlers & Tensioners

Purpose and function in the timing system

The timing belt tensioner pulley in Mercedes W213, C238, and C253 models is responsible for proper guidance and maintaining the correct belt tension throughout the entire engine operating range. A correctly selected component from this group:

• stabilizes the timing belt run under various engine loads,
• reduces vibrations and unwanted belt deflection,
• supports the smooth operation of camshafts and other belt-driven components.

As a result, the timing system maintains predictable operating characteristics, which translates into engine refinement and reduces the risk of failures resulting from improper belt tension.

Construction and fitment for Mercedes models

The tensioner pulley used in this reference has been designed specifically for selected Mercedes E-Class, coupe, and SUV models, which ensures:

• geometry consistent with the factory belt routing system,
• appropriate working surface profile compatible with the timing belt,
• compatibility with the original tensioner and other guide pulleys.

The original origin from the Mercedes brand means that the pulley is adapted to the manufacturer's design requirements, which facilitates installation and limits the need for additional modifications.

Performance characteristics and installation benefits

Choosing an original tensioner pulley from the Tensioner and idler pulleys category allows you to maintain the integrity of the entire timing system. This type of component is designed to operate at high temperatures and under variable loads, which is why the following are particularly important:

• bearing stability across a wide range of rotational speeds,
• wear resistance resulting from continuous contact with the belt,
• maintaining belt alignment relative to other wheels and pulleys.

A used part with preserved functionality can be a reasonable choice for timing system service, especially when the priority is combining factory fitment with cost control. The product condition marked as Used allows for an informed service decision based on the vehicle's actual needs.

Identification and vehicle compatibility

The tensioner pulley has an assigned OEM part number and corresponding interchangeable numbers, which facilitates verification of compatibility with a specific engine version and vehicle model year. Additionally, in the store system, the product is marked with a unique SKU, which speeds up the selection and order processing.

Before purchasing, it is worth comparing the markings with service documentation or the removed component to ensure that the pulley will work with the existing tensioner and timing belt in the given Mercedes vehicle.

Service expansion and additional information

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 pulleys, or tensioners, check the available parts in the Mercedes Tensioner and idler pulleys category.

When choosing components from the secondary market, it is worth approaching the topic of quality and durability consciously. If you want to better understand the specifics of such components and dispel common doubts, check out the article Used car parts: Myths and facts you need to know, where you will find practical tips on the safe selection of used components.