Mercedes W221 Roof Ultrasonic Burglar Alarm Sensor Cover Trim Beige A2218200180

The Mercedes W221 Roof Ultrasonic Burglar Alarm Sensor Cover Trim in beige is an original trim component from the Headliner and parts category, designed to aesthetically and functionally conceal the alarm sensor in the headliner. It ensures a consistent interior look, proper ultrasonic signal transmission, and secure mounting in the factory installation point.

Specifications and technical data

• SKU: A2218200180
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218200180
• Substitutable numbers: A2218200180, A 221 820 01 80, A2218207510, A 221 820 75 10
• Color: Beige
• Category: Headliners & Parts

Purpose and function of the component

The presented cover is dedicated to Mercedes S-Class W221 generation models equipped with a factory roof-mounted ultrasonic alarm sensor. The component is responsible for:

• aesthetic finishing of the headliner area around the sensor,
• stable mounting of the sensor module in the location intended by the manufacturer,
• maintaining the correct operation of the alarm system thanks to the properly shaped geometry of the openings and channels for ultrasonic waves.

By using the original cover, compatibility with factory mounting points and proper fitment with other headliner elements are maintained.

Color scheme and interior integration

The cover is finished in a beige shade, allowing for harmonious integration with the light interior configurations used in the Mercedes W221. This color selection:

• minimizes the visibility of the element against the headliner,
• maintains the stylistic consistency of the passenger cabin,
• allows for discreet integration with other roof trim components.

Using an original component helps avoid shade differences or poor fitment, which often occur with aftermarket replacements.

Installation characteristics

The roof alarm sensor cover is designed for installation in the factory headliner mounting points. This means that:

• there is no need to modify the headliner structure or perform additional adjustments,
• compatibility with the factory ultrasonic sensor layout is maintained,
• installation can be carried out in a repeatable and predictable manner by a professional service.

This type of solution is particularly beneficial for accident repairs, replacing damaged trim elements, or restoring the interior to a factory-like condition.

Condition of the component and practical application

The product comes from the used parts segment, which allows for economical repair while maintaining the manufacturer's original specifications. This type of component is particularly useful when:

• the factory sensor cover has been damaged or cracked,
• the headliner has been removed and the element was lost or deformed,
• it is necessary to restore the full functionality and aesthetics of the alarm system in a premium vehicle.

Choosing an original cover from the used parts market is a reasonable compromise between costs and maintaining the high quality of workmanship characteristic of the Mercedes brand.

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

Why choose original used OEM components

Using original interior trim components, even from the secondary market, allows you to maintain the technical and visual consistency of the vehicle. In the case of the roof ultrasonic alarm sensor cover, this means:

• certainty of fitment for the specific body version and headliner,
• maintaining the correct operation of the alarm system,
• avoiding installation problems typical of low-quality replacements.

To better understand how the immediate availability of original used parts affects vehicle downtime and repair costs, it is worth reading the article: Availability of car parts off the shelf vs. repair time – how do used OEM parts shorten workshop stays?.