Mercedes W251 OM642 Diesel Engine Air Intake Duct Hose Pipe A2515051461

Mercedes W251 OM642 Diesel Engine Air Intake Duct Hose Pipe is an original intake system component designed for OM642 diesel engines in R-Class models. It ensures stable airflow to the engine, which promotes proper boost pressure and smooth operation of the power unit. This used OEM part is a sensible choice for intake system maintenance when you prioritize factory fitment and maintaining engine performance parameters.

Specifications and technical data

• SKU: A2515051461
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2515051461
• Substitutable numbers: A2515051461, A 251 505 14 61
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The air intake hose in the OM642 engine is responsible for a tight and stable connection between the intake system components, including the filter, turbocharger, and subsequent pipe sections. In the case of Diesel engines, this has a direct impact on:

• maintaining proper boost pressure,
• correct cylinder filling with air,
• stable turbine operation and reduction of power drops,
• reducing the risk of smoke and engine control unit errors.

Selecting the correct intake hose is particularly important in V6 CDI engines, where the intake system operates under increased load and is exposed to temperature and pressure fluctuations.

Construction and fitment for Mercedes W251 OM642

Mercedes W251 OM642 Diesel Engine Air Intake Duct Hose Pipe has been designed as a factory component, ensuring it maintains the geometry and diameters specified by the manufacturer. Proper profiling of the hose allows for:

• collision-free routing in the engine bay,
• proper positioning relative to the turbocharger and other hoses,
• maintaining connection tightness using standard clamps and connectors.

Such fitment reduces material stress, minimizes the risk of cracks, and facilitates installation during standard maintenance work on the intake system and engine accessories.

Benefits of using an original intake hose

Using an original hose in the diesel engine intake system brings measurable operational benefits. In practice, this means:

• stable boost parameters – lower risk of power drops and entering limp mode,
• better cooperation with the turbocharger and engine control system,
• reduction of leaks that could cause the intake of unfiltered air or oil from the crankcase ventilation,
• easier diagnostics – eliminating problems resulting from non-original, poorly fitted replacements.

When servicing the OM642 unit, it is worth treating the intake system as a whole – the intake hose, pipes, connectors, and accessory components should work in a way that is predictable for the engine control unit.

Application in Diesel OM642 engines

The OM642 engine is a popular V6 diesel unit used in many models, including the R-Class. High boost pressures and the characteristics of diesel operation require intake hoses to be resistant to thermal and mechanical loads. The correct intake hose:

• supports maintaining proper engine refinement,
• reduces the risk of oil leaks from oil mist in the intake,
• helps maintain stable boost values during dynamic driving.

If you are planning a more extensive refresh of the unit, it is worth reading the material describing the impact of accessories on engine performance: Second life of the Mercedes OM642 engine – how injectors and the turbocharger restore the power of the 3.0 V6 CDI. This will allow you to better plan the scope of work for your vehicle.

Integration with other system elements and part selection

When replacing the intake hose in a Mercedes R-Class, it is worth paying attention to the condition of other system elements – clamps, nozzles, connectors, and adjacent hoses. Consistent selection of parts from one group facilitates installation and reduces the risk of subsequent leaks. If you are assembling a larger set of intake components or looking for other hoses for your car, check the available products in the Mercedes pipes, hoses, and tubes category. This will make it easier to build a logical set of parts tailored to your specific engine configuration.

Summary

Mercedes W251 OM642 Diesel Engine Air Intake Duct Hose Pipe is a practical solution for diesel engine users who want to restore the proper operation of the intake system without experimenting with random replacements. The original geometry of the hose, fitment for the OM642 unit, and predictable behavior under diesel operating conditions promote the maintenance of stable boost parameters and correct cooperation with the turbocharger. It is a sensible choice for intake system maintenance in a Mercedes R-Class, especially when you care about a technically correct and durable solution.