Mercedes W251 Roof Water Drain Channel Front Right O/S Pipe Hose A2517850401

The Mercedes W251 Sunroof Water Channel Hose Right is an original water drainage system component, designed for installation in the front right part of the body. This specialized hose ensures controlled drainage of water from the sunroof, which helps protect the vehicle's interior from moisture and maintains the efficient operation of the drainage system. Thanks to its factory fit and precisely selected channel geometry, installation is straightforward and restores proper drainage function.

Specifications and technical data

• SKU: A2517850401
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2517850401
• Substitutable numbers: A2517850401, A 251 785 04 01
• Location on the vehicle: Front, Right
• Category: Additional Wiper & Washer Components

Sunroof Water Channel Purpose and Function

The presented sunroof water channel is responsible for effective drainage of rainwater from the sunroof area in the front right part of the vehicle. A properly functioning hose minimizes the risk of moisture entering the headliner, pillars, and electrical systems, which is important for both user comfort and the durability of interior components.

Its placement in the front-right zone allows for precise integration with factory guides and brackets, without requiring body modifications. This enables the channel to be used both for replacing a damaged hose and for comprehensive sunroof drainage system maintenance.

Construction and Body Fitment

The hose's construction is designed for the specific geometry of the roof and pillars in Mercedes W251 models, ensuring:

• stable routing along factory mounting points,
• appropriate flow diameter for efficient water drainage,
• compatibility with original sunroof drain spouts.

This precise fit reduces the risk of leaks caused by stress or twisting of the hose and maintains the original drainage route. The component is designed for typical operating conditions, considering variable temperatures and humidity.

Service Application and Installation Benefits

Replacement of the sunroof water channel is recommended in situations where symptoms such as a damp headliner, wet front cabin carpets, or signs of corrosion around the pillars appear. Using this hose allows you to:

• restore proper water drainage from the sunroof on the right side,
• reduce the risk of corrosion in critical body points,
• protect the electrical system routed in the pillars from prolonged exposure to moisture.

This item, categorized under Other Wiper Parts, is part of the windshield and roof area maintenance, where maintaining a watertight seal and efficient water drainage from the body is crucial.

Used Product Characteristics

The offered sunroof water channel is a used part, allowing for an economical restoration of the drainage system's functionality while retaining original part provenance. This type of solution is particularly beneficial for vehicles that have been in use for many years, where both fit and cost-effectiveness are important.

Before installation, a standard check of the hose's clearance and correct seating in its sockets and brackets is recommended to fully utilize its function and ensure even water drainage from the sunroof.

If you are planning comprehensive repairs or upgrades to the windshield and roof area of your Mercedes and need other parts from the same group, such as drain hoses, covers, or guides, check the available parts in the Other Mercedes Wiper Parts category.

Support in Selecting Used Parts

When planning service work using used parts, it is advisable to pay attention to their origin and compatibility with the specific body version. It is good practice to combine original parts with a rational repair budget, which helps keep the vehicle in good working order without excessive costs. More practical tips on choosing used components and optimizing expenses can be found in the article Used Car Parts for Mini Cooper – A Way to Style and Savings.