Mercedes W220 Rear Door Keyless Entry Antenna Left N/S Side A2208200475

Mercedes W220 Rear Door Keyless Entry Antenna Left N/S Side is a component from the Electronic control modules and controllers group, responsible for the proper operation of the keyless entry system in the rear left door. It enables stable communication between the key and the vehicle, which translates into convenient opening and closing of the car and correct key recognition in the door zone.

Specifications and technical data

• SKU: A2208200375
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2208200375
• Substitutable numbers: A2208200375, A 220 820 03 75
• Location on the vehicle: Rear, Left
• Part type: Door Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the keyless antenna

The presented antenna is designed for installation in the rear, left part of the body, in the door area. It is responsible for local signal amplification and reception of the keyless system, allowing the vehicle to precisely determine the position of the key relative to a specific zone. A properly functioning module in this location reduces false "key not found" messages and improves the comfort of daily use. As an element from the Electronic control modules and controllers category, the antenna works with the central comfort system, transmitting information about the presence of the key to it. Stable operation of this component is particularly important when frequently using the keyless access function for the rear doors, e.g., when loading luggage or transporting passengers in the back seat.

Benefits of using an original antenna in the Mercedes W220

Using a dedicated keyless antenna in the Mercedes W220 ensures:

• consistency with the vehicle's factory electrical installation architecture,
• proper cooperation with existing comfort controllers,
• maintenance of the range and sensitivity of the keyless system in the rear left door zone as intended by the manufacturer,
• reduction of problems with random lack of response to the key in this part of the body. Thanks to this, the driver receives a solution that is structurally and electrically matched, without the need for wiring modifications or interference with the software of other modules.

Installation characteristics and vehicle integration

The antenna is prepared for installation in the factory-designated location in the rear, left part of the vehicle. Its design allows for mounting in existing attachment points and connection to the original electrical harness. Such a solution facilitates service and shortens replacement time, which is important for both workshops and users servicing the vehicle themselves. Placement in the rear left door zone allows for precise coverage of this part of the body with the keyless signal, without interfering with the operation of other antennas in the vehicle. A properly selected component helps maintain an even distribution of key detection zones around the car.

Why choose a used electronic module

In the case of components such as a keyless antenna, choosing a used part from disassembly is often an economical solution while maintaining the functionality required for daily operation. Modules of this type are not subject to typical mechanical wear, so with proper verification, they can continue to work in the vehicle for a long time. If you want to better understand when purchasing used automotive electronics is justified and how to safely select such components for your car, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Expanding the comfort electronics system in a Mercedes

If you are planning a comprehensive repair or upgrade of the comfort electronics area in your Mercedes and need other elements from the same group, such as control modules, body controllers, or additional comfort system components, check the available parts in the Mercedes electronic control modules and controllers category.