Mercedes W415 Citan Sliding Door Switch Contact Sensor Rear Left N/S A4158200154

Mercedes W415 Citan Sliding Door Switch Contact Sensor Rear Left N/S is a precision electrical component responsible for reliably detecting door position and transmitting signals to the vehicle's electrical system. Properly selected and correctly installed, it ensures stable operation of comfort and safety systems, which translates into the efficient functioning of the rear left sliding door zone in your Mercedes. This is a practical service solution for users who want to restore the full functionality of the original door assembly.

Specifications and technical data

• SKU: A4158200154
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4158200154
• Substitutable numbers: A4158200154, A 415 820 01 54
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and function in the vehicle

The presented contact sensor is designed for installation in the rear left body zone, within the sliding door area of the Mercedes Citan W415 series. It is responsible for stable transmission of the door open/close signal to the vehicle's electrical system, which is important for interior lighting, instrument cluster signaling, or central locking operation.

Thanks to its dedicated placement on the vehicle, the sensor works with the factory wiring harness and the sliding door lock, maintaining the parameters specified by the manufacturer. This solution allows for maintaining consistency with the original electrical architecture of the body.

Construction and fitment for Mercedes Citan W415

The element has been designed as a part from the Doors and door panels group, with the specific geometry of the sliding doors in the Citan model in mind. The shape and arrangement of the contacts are adapted to the factory mounting points, which facilitates installation in the location provided by the vehicle manufacturer.

As a component dedicated to a specific position on the body, the sensor ensures:

• correct signal routing in the sliding door circuit,
• mechanical fitment to the structure of the rear left body section,
• preservation of the original logic of comfort systems.

Characteristics of the used element

The offered contact sensor is a used part, sourced from dismantling, which represents a reasonable compromise between repair costs and maintaining the original manufacturer's specifications. Such components are frequently chosen by professional workshops and conscious users who prefer original design solutions over replacements with uncertain parameters.

In the case of electrical elements mounted within sliding doors, proper cooperation with the existing installation is particularly important, which is why using an original contact sensor from the same model line reduces the risk of compatibility issues.

Service application and benefits of installation

Replacing the rear left sliding door contact sensor is recommended in situations where symptoms such as incorrect open door indications, interior lighting problems, or unstable central locking operation in this part of the vehicle occur. Installing a functional element allows you to:

• restore correct door status signaling on the instrument cluster,
• stabilize the operation of comfort systems associated with the rear left body zone,
• maintain electrical consistency within the factory Mercedes installation.

For workshops and services specializing in the Mercedes brand, using a dedicated contact sensor for a specific position on the vehicle shortens diagnostic and installation time, and also facilitates maintaining manufacturer standards.

Expanding repairs within the Mercedes sliding door area

If you are planning a comprehensive repair or upgrade of the sliding door zone in your Mercedes and need other elements from the same group, such as guides, hinges, or door panels, check the available parts in the Mercedes Doors and door panels category.

If you want to better understand the specifics of components from dismantling and make informed choices when selecting used parts for your car, it is worth reading the practical information contained in the article Used car parts: Myths and facts you need to know, which helps to separate reliable data from common opinions.