Mercedes W251 V6 Diesel OM642 Air Filter Box Inlet Duct Rear Left A2515051561

Mercedes W251 V6 Diesel OM642 Air Filter Box Inlet Duct Rear Left is an original intake system component designed for diesel engines. It ensures a tight and stable connection between the air filter box and the rest of the system, which promotes proper supply of clean air to the power unit. This used component from this series is a solution that allows for an economical, yet technically correct repair of the intake system in your Mercedes.

Specifications and technical data

• SKU: A2515051561
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2515051561
• Substitutable numbers: A2515051561, A 251 505 15 61
• Location on the vehicle: Rear, Left
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The presented intake duct works with the air filter box in Mercedes W251 class models with the OM642 diesel engine. The component is responsible for directing filtered air to the subsequent parts of the intake system, which is important for the stable operation of the diesel unit, correct mixture composition, and engine refinement.

Its placement on the left side in the rear part of the engine compartment means the component operates in a zone with elevated temperatures and exposure to vibrations. Using a dedicated, factory-made duct reduces the risk of leaks, power loss, or errors related to airflow.

Construction and fitment for Mercedes W251 OM642

The duct has been designed specifically for the geometry of the engine bay in the Mercedes W251 with the OM642 unit, ensuring:

• proper routing of the airflow from the filter box,
• stable seating in factory mounts and sockets,
• compatibility with standard diesel intake system components.

The precise fit of the shape and cross-sectional diameter translates into maintaining proper airflow without unnecessary turbulence or restrictions. This is particularly important in modern diesel engines, where the intake system works in conjunction with sensors and the engine control unit.

Performance characteristics and benefits of use

Choosing an original intake duct for the air filter box in the Mercedes W251 OM642 allows you to maintain the structural integrity of the entire system. In practice, this means:

• maintaining factory diesel engine performance parameters,
• reducing the risk of intake connection leaks,
• proper cooperation with the air filter box and other hoses.

For the user, this translates into more stable performance, predictable throttle response, and a lower risk of problems related to the intake of unfiltered air or pressure drops in the system.

Condition, installation, and service application

The offered element comes from the Hoses, lines, and pipes group and is intended for reinstallation in a vehicle. A used intake duct is a good solution in situations where the existing element has cracked, delaminated, thermally deformed, or shows signs of leakage at the joints. Replacing it with an original component from dismantling allows you to reduce repair costs while maintaining proper fitment.

Due to its specific location in the rear, left part of the engine compartment, installation should be entrusted to someone with experience in diesel engine intake systems. Correct seating of clamps and connectors is crucial for maintaining tightness and avoiding the intake of "false" air.

Intake system 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 intake hoses, vacuum lines, or breather pipes, check the available parts in the Mercedes Hoses, lines, and pipes category.

When working on diesel units, it is also worth paying attention to the condition of the entire engine auxiliary equipment. If you are considering replacing or purchasing a complete engine, a guide on verifying used units may be helpful – you can find more practical tips in the article Buying a used engine: 5 things you must check before installation.