Mercedes W117 W156 C205 W212 W213 W217 Rear Switch Sensor Module A2229059004

The Mercedes W117 W156 C205 W212 W213 W217 Tailgate Opening Sensor is an original body system component designed for installation at the rear of the vehicle. It provides precise information about the tailgate's status, supporting the correct operation of comfort and safety systems. Thanks to its factory origin from the Mercedes group, it maintains full structural compatibility with the dedicated models.

Specifications and technical data

• SKU: A2229059004
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2229059004
• Substitutable numbers: A2229059004
• Location on the vehicle: Rear
• Category: Other Interior Parts & Accessories

Purpose and Function of the Tailgate Opening Sensor

The tailgate opening sensor in Mercedes W117, W156, C205, W212, W213, W217 models is responsible for transmitting information about the rear tailgate's position to the control units. This is important for, among other things:

• correct operation of the trunk lighting,
• indicator lights informing the driver about the tailgate being closed,
• integration with the vehicle's comfort and security systems.

Its placement at the rear of the vehicle allows for direct reading of the tailgate's status, which translates to stable operation of the body's electronic systems.

Compatibility with Mercedes Models

The presented sensor is designed for selected body versions of the W117, W156, C205, W212, W213, and W217 series. This means it is adapted to the electrical and mechanical architecture of these generations, without the need for installation modifications.

As a component from the Mercedes group, it retains the correct mounting points, appropriate connector type, and operating characteristics required by the body control units in these models.

Characteristics of a Used Part

The sensor comes from the secondary market, allowing for economical vehicle repair while maintaining the original manufacturer's specifications. A used part is a good solution when:

• maintaining factory compatibility with the electrical system is important,
• service costs for body repairs are to be reduced,
• consistency of operating parameters with other modules in the vehicle is to be maintained.

Using an original sensor from the aftermarket minimizes the risk of communication problems within the vehicle network and reduces the need for additional adaptation.

Benefits of Using an Original Rear Tailgate Sensor

Choosing a tailgate opening sensor dedicated to specific Mercedes series offers a range of practical benefits:

• stable cooperation with factory body control units,
• correct operation of the trunk opening and closing signaling,
• preservation of functionality for comfort systems related to the rear tailgate.

This allows for the restoration of system functionality without interfering with wiring harnesses or module operating logic, which is particularly important in more modern Mercedes designs.

If you are modernizing or repairing the rear tailgate system in your Mercedes and need other components related to the bodywork and equipment mounted at the rear of the vehicle, check the available parts in the Other Mercedes category.

For drivers interested in comparing technical solutions used in different brands and sports versions, including body electronics and assistance systems, an article on Audi RS vs. Other Models – What Lies Under the Hood and Chassis? may be helpful, showing how manufacturers differentiate equipment and components within their model ranges.

If you are planning a longer renovation project or a gradual restoration of an older Mercedes using parts from the secondary market, it is worth reading the guide Second Life for Youngtimers – How Used Car Parts Revitalize Cars from 1998–2012, which describes practical scenarios for selecting and installing used components.