Mercedes W415 Alternator Belt Tensioner Pulley Bracket OM608 117109168R

The Mercedes W415 Alternator Belt Tensioner Pulley Mount OM608 is a component from the tensioner and idler pulleys category, designed for the accessory drive system in Mercedes vehicles. This used genuine part ensures proper guidance and tension of the alternator belt, contributing to stable operation of the OM608 engine's accessories and reducing the risk of unwanted vibrations.

Specifications and technical data

• SKU: 117109168R
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 117109168R
• Substitutable numbers: 117109168R, 117 109 168 R
• Part type: Tensioner Pulley
• Category: Idlers & Tensioners

Purpose and Function in the Drive System

The tensioner pulley with mount is responsible for maintaining the correct tension of the alternator belt in the OM608 unit, which is crucial for the proper functioning of the alternator and other belt-driven components. A correctly selected element from this group minimizes belt slippage, reduces noise, and supports even loading of accessory bearings.

In Mercedes W415 series models, the use of the appropriate tensioner and idler pulley helps maintain stable belt guidance geometry, which is important for both belt durability and driving comfort.

Construction and Technical Characteristics

The tensioner pulley integrated with the mount forms a complete mounting solution for the alternator belt system. The design intended by the vehicle manufacturer ensures:

• proper belt guidance in the accessory drive system,
• stable mounting to the OM608 engine unit,
• operation adapted to the loads encountered in engines used in the Mercedes W415.

By using an element from the tensioner and idler pulleys category with parameters consistent with factory solutions, the accessory drive system maintains proper operating conditions across the full engine speed range.

Benefits of Using a Genuine Mercedes Part

Choosing a genuine Mercedes alternator belt tensioner pulley with mount translates into a number of practical advantages in daily operation:

• Factory Fit – the element is designed specifically to work with the OM608 engine and the belt system in the W415 body.
• Stable Alternator Belt Operation – reduces the risk of belt skipping, squealing, and uneven belt wear.
• Engine Accessory Protection – correct belt tension reduces the load on the alternator bearings and other components.
• Consistency with Factory Design – no need for modifications to mounts or belt guidance geometry.

Application in Service and Diagnostics

The alternator belt tensioner pulley with mount is particularly important for:

• repairs to the accessory drive system after a belt failure,
• preventive replacement of guide and tensioning elements,
• diagnosing noises coming from the vicinity of the accessory belt.

Replacing a worn tensioner and idler pulley with a functional element restores correct belt tension and reduces unwanted vibrations, which is important for the durability of the entire system.

Complementary Offer and Additional Materials

If you need other Mercedes tensioner and idler pulleys, check out our dedicated category: Mercedes tensioner and idler pulleys. This will help you easily select belt guide elements tailored to your specific model and engine version.

To compare technical solutions used in different brands and sports versions, you can read the article on the construction of powertrains and chassis: Audi RS vs. other models – what's under the hood and chassis?. This provides a good supplement to your knowledge about differences in the construction of drive and accessory systems.

Summary

The Mercedes W415 Alternator Belt Tensioner Pulley Mount OM608 is a practical choice for servicing the accessory drive system in vehicles of this series. Using a genuine element from the tensioner and idler pulleys group supports correct belt tension, stable alternator operation, and long-term, predictable engine unit performance.