Mercedes W205 Start Stop Volume Switch Center Console Lower Left A2139050102

The Mercedes W205 Radio Panel Switch is an original part from the Switches, Controls, and Ignition Switches group, designed for installation on the left side of the center console. It ensures precise control of radio and multimedia system functions, maintaining factory ergonomics and the consistent appearance of the Mercedes car interior.

Specifications and technical data

• SKU: A2139050102-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139050102
• Substitutable numbers: A2139050102, A 213 905 01 02
• Location on the vehicle: Left
• Category: Switches & Controls

Technical Characteristics and Purpose

The radio panel switch is designed as part of the factory multimedia control system in Mercedes W205 family models. Its placement on the left side of the vehicle facilitates convenient operation by the driver, allowing quick access to key functions without taking their eyes off the road. The design is adapted to the original dashboard architecture, which simplifies installation and helps maintain the cockpit's stylistic consistency.

As a component from the Switches, Controls, and Ignition Switches category, this part is responsible for transmitting control signals to the vehicle's electronic systems, ensuring stable and repeatable operation of the audio system and related comfort functions.

Benefits of Using an Original Switch

Using an original radio panel switch in a Mercedes W205 ensures full compatibility with the vehicle's electrical system and electronics. Proper matching of connectors, shape, and mounting points translates to:

• secure seating in the center console without play or unwanted vibrations,
• correct operation with the factory multimedia system,
• preservation of the original interior appearance and ergonomics,
• reduction of the risk of communication errors in the vehicle's bus system.

This makes the switch a functional solution for both replacing a damaged part and restoring full radio control functionality after system repairs.

Condition, Origin, and Practical Application

The offered part is a used component, sourced from a dismantled Mercedes vehicle. Such components are often chosen by users who want to maintain a high standard of equipment while optimizing service costs. For switches and control elements, maintaining the original specifications is particularly important, which translates to correct button operation, illumination, and communication with control modules.

The radio panel switch, installed on the left side, is suitable for repairs after mechanical damage to the console, problems with button responsiveness, or restoring full audio system functionality after system interventions.

Integration with Other Control Elements

In modern Mercedes models, such as the W205, the multimedia control system is integrated with other comfort and onboard electronics modules. A properly selected radio panel switch facilitates:

• maintaining a consistent operating logic for all functions on the console,
• correct operation of multimedia system messages and responses,
• maintaining a uniform aesthetic of buttons and illumination throughout the cockpit.

This is particularly important in premium cars, where users expect comfortable, intuitive operation and a harmonious interior appearance.

Used Mercedes Parts – More Information

If you want to learn more about the advantages of using original, used components in this brand's cars – including electronics, control, and comfort elements – we recommend reading the guide on our blog: Used Mercedes Parts – Original Components from Dismantling. You will find practical tips on how to make informed choices about components to maintain high quality while reducing operating costs.

If you are planning a comprehensive repair or upgrade of the multimedia control area in your Mercedes and need other parts from the same group, such as function buttons, additional control modules, or operating panels, check the available parts in the Mercedes Switches, Controls, and Ignition Switches category.