Mercedes W251 V251 Panoramic Roof Sunroof Wind Deflector Front A2517800344

Mercedes W251 V251 Panoramic Roof Sunroof Wind Deflector Front is an original body component designed specifically for R-Class models. It is responsible for controlled airflow direction when the roof is open, improving acoustic comfort and airflow stability in the cabin. Thanks to its precise fit to the panoramic roof structure, it serves as a functional addition to the glass opening and sealing system.

Specifications and technical data

• SKU: A2517800344
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2517800344
• Substitutable numbers: A2517800344, A 251 780 03 44
• Location on the vehicle: Front
• Part type: Wind Deflector
• Category: Sun Visors, Wind & Bug Deflectors

Purpose and function in the vehicle

The presented deflector is a component mounted in the front part of the panoramic sunroof in the Mercedes R-Class W251/V251 generation. Its task is to limit air turbulence and reduce noise when driving with the roof glass tilted or retracted. A properly functioning deflector improves travel comfort at higher speeds, reduces the "drumming" air effect in the cabin, and stabilizes airflow over the body.

The element belongs to the Wind Deflectors group, which means it works directly with the glass surface of the roof, affecting the vehicle's aerodynamics and acoustics. Its placement at the front of the vehicle means the deflector operates in the most heavily loaded airflow zone, which is why its proper fit is important for the durability of the entire roof mechanism.

Compatibility and fit for Mercedes W251/V251

The deflector has been developed as a part dedicated to the panoramic roof in the Mercedes R-Class, ensuring it maintains factory geometry, mounting points, and range of motion. The original design ensures:

• proper fit with the sunroof frame and seals,
• cooperation with the opening mechanism and guides,
• stable operation at typical highway speeds.

Such a fit reduces the risk of leaks, unwanted vibrations, and excessive noise that often occurs when using non-dedicated elements. In the case of a panoramic roof, where the glass surface is large, a functional wind deflector has a significant impact on subjective driving comfort.

Characteristics of the used element

The offered deflector comes from dismantling and is sold as a used part. Such body components, while maintaining correct geometry and functional mounting points, can be successfully reused. In practice, this means the possibility of restoring the proper operation of the panoramic sunroof without the need to invest in a new element, while maintaining the manufacturer's original specifications.

Choosing a used OEM deflector is particularly beneficial in situations where the existing element has suffered mechanical damage (cracks, deformations, broken mounts) or has stopped working properly with the roof mechanism, causing increased noise and uncomfortable air turbulence.

Benefits of using an original wind deflector

Using an original wind deflector in a panoramic roof brings a number of practical benefits:

• Better aerodynamics – the optimized shape reduces air turbulence over the front edge of the roof glass.
• Lower noise level – reduction of the resonance effect and air "pulsing" in the cabin with the roof open.
• Stable mechanism operation – proper airflow guidance reduces the load acting on the glass and seals.
• Factory fit – no need for modifications, drilling, or adjusting the element to the roof frame.

Thanks to this, replacing a damaged deflector with an original used element is a reasonable solution both technically and economically, allowing the functionality of the panoramic roof to be maintained at a level close to factory condition.

Expanding the wind deflector system and part selection

If you are planning a comprehensive repair or upgrade of the glass roof area in your Mercedes and need other elements from the same group, such as additional deflectors, glass edge covers, or guide rails near the windows, check the available parts in the Mercedes Wind Deflectors category.

When selecting used body elements, it is worth using "one-stop-shop" solutions that allow you to complete a larger number of components in one place, while maintaining manufacturer consistency and specifications. If you want to learn how to effectively plan such purchases and what to pay attention to when choosing original used parts, read the article Comprehensive supply: from the engine to the smallest clip – how to complete used car parts in one place?.