Mercedes CL203 Rear Roof Alarm Motion Sensor Cover Trim Housing Grey A2038219551

Mercedes CL203 Rear Roof Alarm Motion Sensor Cover Trim Housing is a component from the Headliner and parts group, designed for installation in the rear area of the vehicle interior. The grey motion sensor cover allows for an aesthetic and functional finish of the headliner, ensuring a consistent look of the cabin and proper positioning of the comfort or safety system component. It is a practical solution for users who care about technical installation accuracy and the visual consistency of their Mercedes interior.

Specifications and technical data

• SKU: A2038219551-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2038219551
• Substitutable numbers: A2038219551, A 203 821 95 51
• Location on the vehicle: Rear
• Color: Grey
• Category: Headliners & Parts

Purpose and function in the vehicle

The described motion sensor cover is dedicated to the rear part of the cabin, where it is responsible for stable mounting and discreetly concealing the sensor within the headliner. Thanks to this element, the sensor remains properly positioned relative to the interior, which promotes its correct operation while not disrupting the stylistic lines of the roof upholstery.

The grey color of the housing makes it easy to match the factory interior finish of many Mercedes versions, reducing the need for additional modifications. This is particularly important when replacing a damaged or missing cover after service work, collisions, or interference with the headliner's electrical installation.

Construction, color, and fitment

The element has been designed as an integral part of the headliner, with appropriately shaped edges and mounting points, which promotes secure seating in the original mounting holes. The grey finish allows for maintaining a uniform color scheme in the rear part of the ceiling, without visible contrasts or mismatches.

The cover is prepared to work with the factory motion sensor, providing it with sufficient working space and openings or indentations enabling proper operation. As a result, the user gains an aesthetic headliner finish while maintaining the functionality of the system in which the sensor operates.

Characteristics of the used component

The product comes from dismantling, which in practice means it is an original component from a Mercedes vehicle, retaining factory geometry and mounting methods. For many users, this is a beneficial solution because the element is already proven in operation and adapted to the real working conditions in the car.

Choosing a used motion sensor cover is particularly sensible for interior repairs, where the consistency of shape, color, and texture with other headliner elements matters. This allows for reducing the risk of visual differences that could appear when using replacements with a different shade or a different surface finish.

Benefits of using a dedicated cover

• Factory fit to the headliner – proper geometry and mounting points facilitate installation in the rear part of the cabin.
• Consistent interior color scheme – the grey shade promotes a harmonious blend with the roof upholstery.
• Protection and stabilization of the motion sensor – the housing protects the element against accidental mechanical damage.
• Aesthetic finish of the rear zone – no visible mounting holes or wires within the ceiling area.

Mercedes headliner and parts – expansion and completion

If you are planning a comprehensive repair or upgrade of the headliner zone in your Mercedes and need other elements from the same group, such as covers, grilles, or additional panels, check the available parts in the Mercedes headliner and parts category.

Support in selecting used interior elements

When assembling used interior components – such as headliner elements, sensor housings, or grilles – it is worth paying attention to the compatibility of the equipment version and the vehicle's model year. This helps to avoid problems with installation and differences in the upholstery shade.

If you are interested in a broader context of selecting used components in a car, including the impact of their condition on driving comfort and safety, practical tips can be found in the article Standard vs. sports suspension – differences in construction and is it worth buying used suspension parts?, which discusses the approach to purchasing used subassemblies in an orderly and technical manner.