Mercedes W251 Water Drain Channel Front Right O/S Pipe Hose A2518320490

Front Right Water Drain Hose Mercedes W251 is an original component of the water drainage system from the windshield and cowl area, designed for installation on the driver's side in right-hand drive versions. Thanks to its factory fit to the body, it ensures efficient water drainage, reducing the risk of moisture in the cowl area and electrical components. This is a practical solution for users who want to restore the proper functioning of the drainage system in their Mercedes.

Specifications and technical data

• SKU: rhd-A2518320490
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2518320490
• Substitutable numbers: A2518320490, A 251 832 04 90
• Location on the vehicle: Front, Right
• Category: Additional Wiper & Washer Components

Purpose and Function of the Component

The water drain hose is part of the water drainage system for the front body area, directing water from the windshield and cowl area away from critical vehicle zones. It is installed in the front of the car, on the right side, which is important when selecting the correct component for a specific body version. A properly functioning drain reduces water accumulation in the wiper mechanism area and electrical installations.

Construction and Fit for Mercedes W251

The hose in question has been designed specifically for the Mercedes R-Class W251 generation, maintaining the factory routing geometry. The shape and diameter of the hose are adapted to the original mounting points and body grommets, which facilitates installation and ensures the correct water flow direction. As a result, the component works well with cowl covers and the wiper mechanism without interfering with their operation.

Benefits of Using an Original Drain Hose

Using an original water drain hose in the Mercedes W251 allows for the preservation of the factory water drainage characteristics from the front of the body. The main benefits include:

• proper fit to the cowl and body structure,
• stable water routing away from critical components,
• reduced risk of water accumulation in the wiper mechanism area,
• compatibility with factory brackets and mountings.

This makes the hose a functional addition to the water drainage system and helps maintain optimal operating conditions for components located in the front of the vehicle.

Product Condition and Service Application

The component is a used part intended for reinstallation in a vehicle where a damaged, leaky, or deformed drain hose needs replacement. It is suitable for standard repairs after cowl flooding as well as for comprehensive servicing of the wiper system and cowl covers. Correct selection of the installation side (front, right side) is crucial for the proper functioning of the entire system.

Related Components and Technical Advice

When working on the cowl and wiper system, it is also worth checking the condition of the wiper arms, mechanism, and seals in this area to restore full system functionality in one service operation. If you are planning a comprehensive repair or upgrade of the cowl and wiper area in your Mercedes and need other parts from the same group, such as drain channels, water discharge hoses, or additional covers, check the available parts in the category Other Mercedes Wiper Parts.

For users who are simultaneously servicing the drivetrain or suspension of their car, a guide on selecting used components may be helpful. Practical tips, comparison tables, and answers to frequently asked questions can be found in the article "Stock vs. Sport Suspension – Construction Differences and Is It Worth Buying Used Suspension Parts?", which facilitates informed planning of vehicle repairs and upgrades.