Mercedes W205 W213 W238 W257 W290 Windshield Rain Light Sensor Cover A2138210136

Mercedes W205 W213 W238 W257 W290 Windshield Rain Light Sensor Cover is an original component designed for factory installations in C-Class, E-Class, and CLS models. It ensures stable mounting of the sensor behind the rearview mirror, which translates into the proper operation of automatic wipers and automatic headlight activation. Thanks to its precise fit for the specific body generation, it provides a safe and functional service solution for Mercedes-Benz users.

Specifications and technical data

• SKU: A2138210136-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2138210136
• Substitutable numbers: A2138210136, A 213 821 01 36
• Category: Other Interior Parts & Accessories

Purpose and function of the component

The rain and light sensor cover is mounted on the inner side of the windshield, in the rearview mirror area. Its purpose is to:

• maintain the sensor module in the correct operating position,
• protect the sensor against accidental mechanical damage from the cabin side,
• limit stray light, which improves the reading of signals from the windshield,
• aesthetically close the mounting space in the upper part of the windshield.

Proper seating of this cover has a direct impact on the stability of the automatic wipers and light sensor, and thus on driving comfort in changing weather conditions.

Compatibility with Mercedes models

The presented cover has been designed for the windshield and headliner architecture in selected Mercedes C-Class, E-Class, and CLS models from the W205, W213, W238, W257, and W290 series. This means that:

• the geometry of the component is matched to the shape of the windshield and mirror base in these generations,
• the clips and guides correspond to the factory mounting points,
• there is no need for modifications or forced fitting when the correct model is selected.

For certainty of selection, it is recommended to verify compatibility by OEM number or VIN, which helps avoid assembly issues and ensures factory-fit with other interior trim elements.

Design characteristics and assembly

The rain and light sensor cover is a component that monitors the position of the module relative to the windshield, so its design takes into account:

• guiding the sensor along the windshield axis,
• proper adhesion to the glass surface,
• slots for factory mirror latches and clips.

Assembly is typical for OEM solutions – after properly preparing the windshield and sensor module, the cover is snapped into the designated points without the need for additional adapters. Thanks to this, a service center or workshop can efficiently restore the full functionality of the sensor system after windshield replacement or repairs in the mirror area.

Why use an original sensor cover?

Using an original cover in Mercedes W205, W213, W238, W257, and W290 series cars allows you to maintain the structural integrity of the entire module by the mirror. In practice, this means:

• proper operation of automatic rain and light-related functions,
• reduced risk of system errors resulting from improper sensor positioning,
• aesthetic interior finish in the upper part of the windshield, consistent with the factory standard.

This solution is especially recommended after windshield replacement or during sensor system repairs when you want to maintain the original functionality and interior appearance.

Product condition and service application

The item is a salvaged part, which makes it an attractive alternative to new parts while maintaining the manufacturer's original specifications. Such covers are often used in:

• professional service centers specializing in the Mercedes brand,
• workshops dealing with windshield replacement,
• post-accident repairs in the upper part of the windshield.

Thanks to this, you can economically restore the full functionality of the sensor system while maintaining compliance with the factory interior design.

If you are planning a comprehensive repair or upgrade of the cowl and upper windshield area in your Mercedes and need other components from the same group, such as covers, grilles, or additional mirror housings, check out the available parts in the Other Mercedes category.

For a better understanding of the structural differences between sports and standard car versions, as well as the impact of equipment on handling and safety, it is worth reading the article on our blog: Audi RS vs other models – what is hidden under the hood and chassis?.