The MERCEDES E-Class W210 Alarm Motion Sensor is a component from the Electronic Control Units and Controllers category, responsible for monitoring the interior space of the vehicle in the rear cabin area. It enables the proper functioning of the factory alarm system, ensuring precise motion detection and stable cooperation with other security modules. The grey housing color aids in aesthetic integration with the interior upholstery.
Specifications and technical data
- SKU: A2208208410
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A2208208410
- Substitutable numbers: A2208208410, A 220 820 84 10, KZ
- Location on the vehicle: Rear
- Color: Grey
- Category: ECUs & Computer Modules
Purpose and Function in the Alarm System
The alarm motion sensor is designed for installation in the rear part of the body, where it monitors the passenger space for unwanted activity after the alarm is armed. As a component of the Mercedes vehicle security system, it is responsible for:
- detecting motion in the rear cabin after the vehicle is locked and armed,
- transmitting a signal to the main alarm controller,
- cooperating with other electronic control modules,
- maintaining a consistent operating logic for the entire security system.
Therefore, replacing a faulty sensor with a functional unit allows for the restoration of correct alarm operation without the need to interfere with other components.
Construction, Placement, and Vehicle Integration
The presented sensor belongs to the group of Electronic Control Units and Controllers, meaning it communicates with the vehicle's bus system and other controllers responsible for comfort and safety. Its placement in the rear of the car ensures optimal coverage of the passenger area, and the grey housing facilitates discreet installation in the upholstery or headliner.
The module has been designed for factory installation in the Mercedes E-Class W210 generation, which translates to:
- dedicated mounting points in the body,
- matched electrical connectors,
- compatibility with the operating logic of the original alarm system.
Benefits of Using an Original Module
Using an original alarm motion sensor in the Mercedes E-Class W210 allows for maintaining the integrity of the entire security system. In practice, this means:
- stable cooperation with the factory alarm controller without the need for installation modifications,
- preservation of the sensitivity and response time parameters specified by the manufacturer,
- avoidance of compatibility issues typical of universal replacements.
A used OEM part is a sensible choice when the priority is to restore full system functionality at a controlled cost, while maintaining the vehicle's original electrical architecture.
Selection and Diagnostics of Electronic Control Units
When selecting an alarm motion sensor for the Mercedes E-Class W210, it is crucial to match it to the specific equipment configuration and security system version. In practice, it is advisable to:
- compare the physical shape and connectors with the removed component,
- verify compatibility with the installation in the rear part of the body,
- perform computer diagnostics of the alarm system after installation.
If you are interested in broader topics related to vehicle electronics, control unit operating logic, and the use of salvaged parts, it is worth reading the article on our blog: how to care for electronic systems and modules in modern cars using salvaged parts. This will help you better understand the relationships between individual modules and avoid common installation errors.
Other Mercedes Electronic Control Units and Controllers
If you are also looking for other Mercedes Electronic Control Units and Controllers to expand or repair comfort, safety, or multimedia systems, check out our dedicated offer: Mercedes Electronic Control Units and Controllers. This will allow you to easily assemble a set of compatible components for your vehicle of this brand.
