Mercedes-Benz A B Class W169 W245 Air Deflector Lamella Glass Roof A1697800421

Mercedes-Benz A B Class W169 W245 Air Deflector Lamella Glass Roof is an original body component designed for Mercedes vehicles equipped with a glass roof. Engineered as part of the factory roof system, it improves driving comfort, reduces air turbulence and noise when the panel is open, while maintaining stylistic consistency with the vehicle's body line.

Specifications and technical data

• SKU: A1697800421
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1697800421
• Substitutable numbers: A1697800421, A 169 780 04 21, EM
• Category: Other Exterior Parts & Accessories

Purpose and function in the roof system

The presented air deflector is a component mounted at the front of the glass roof in Mercedes A-Class W169 and B-Class W245 models. Its task is to direct the airflow over the cabin, which reduces aerodynamic noise, limits drafts inside the vehicle, and improves airflow stability at higher speeds.

Thanks to its precise fit to the roof structure and factory mounting points, this component works in harmony with the glass opening mechanism, maintaining the correct geometry and smooth operation of the entire system.

Advantages of using an original deflector

Using an original glass roof lamella ensures:

• proper cooperation with the roof guides and mechanism,
• appropriate shaping of the leading edge for airflow,
• consistent appearance with other body components,
• maintenance of factory acoustic parameters inside the cabin.

Choosing an original Mercedes component minimizes the risk of issues with glass closing, leaks, or improper airflow, which is particularly important when operating the vehicle in various weather conditions.

Condition, fitment, and installation

The offered deflector comes from the used original parts segment, which allows for a favorable price-to-quality ratio while maintaining factory specifications. The component is intended for installation in locations designated by the manufacturer, using the original mounting geometry.

Before installation, it is recommended to verify compatibility with the specific roof equipment version and to check the condition of the guides and seals to ensure the proper operation of the entire system. Professional installation will allow you to fully utilize the benefits of the deflector and avoid additional adjustments.

Support in choosing used components

When selecting used body and equipment components, it is worth paying attention to their origin, completeness, and compatibility with the model version. If you want to better prepare for your purchase and avoid common mistakes when selecting parts for upgrades or repairs, our guide on the secondary market will be helpful – check out practical tips in the article Buying used car parts – the most common mistakes when choosing tuning parts.

Related categories and additional information

If you are planning a comprehensive repair or upgrade of the roof area and the upper part of the body in your Mercedes and need other components from the same group, such as guides, seals, or additional equipment modules, check out the available parts in the category Other Mercedes.

To compare the characteristics of sports drivetrains, braking systems, and suspension with solutions used in standard versions, you can familiarize yourself with the structural analysis in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses the differences in the construction of key components and helps to better understand the relationships between aerodynamics, power, and vehicle handling.