Mercedes W204 Key Reader Ignition Lock Remote Control Unit Module A2079057101

Mercedes W204 Key Reader Ignition Lock Remote Control Unit Module is an original component from the Switches, control elements and ignition locks group, designed for the starting system and ignition control in Mercedes vehicles. This used OEM component ensures proper integration with the vehicle's electrical system, maintaining factory safety standards and operational ergonomics.

Specifications and technical data

• SKU: A2079057101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2079057101
• Substitutable numbers: A2079057101, A 207 905 71 01
• Category: Switches & Controls

Purpose and function of the ignition lock

Mercedes W204 Key Reader Ignition Lock Remote Control Unit Module is responsible for managing the engine starting process and controlling the vehicle's basic electrical circuits. A properly selected ignition lock guarantees correct recognition of the key or insert, proper operating positions (accessories, ignition, start), and stable signal transmission to control modules.

The component belongs to the Switches, control elements and ignition locks group, which means it works in conjunction with other components responsible for driver operation, such as steering column switches or comfort control modules.

Benefits of using an original used ignition lock

Using an original ignition lock from dismantling allows you to maintain the factory parameters of the starting system without the need for installation modifications. This solution is particularly beneficial for:

• repairs after an ignition system failure or damage to the ignition lock mechanism,
• restoring full functionality after interference with the electrical installation,
• maintaining compatibility with factory control modules.

A used OEM component is often a more predictable choice than a cheap replacement, as it retains the original design, mounting method, and electrical characteristics intended by the manufacturer.

Integration with the Mercedes control system

The ignition lock in the Mercedes W204 works with the vehicle's extensive electronic system, which is why maintaining compatibility with factory solutions is crucial. The original component from the Switches, control elements and ignition locks group minimizes the risk of communication errors with comfort modules, security systems, and engine controllers.

This makes it possible to maintain the correct operation of functions related to starting, steering wheel locking, or handling electrical accessories, without the need for additional programming beyond the standard service procedures provided for the given model.

Product condition and service application

The presented ignition lock is a used part, sourced from a dismantled Mercedes vehicle. This type of component is a good choice for maintenance repairs when the priority is to maintain original build quality at reasonable service costs.

The element will work well both in the case of replacing a damaged ignition lock and during a comprehensive reconstruction of the control system in a vehicle after a collision or electrical system failure.

If you are planning a comprehensive repair or upgrade of the control and starting zone in your Mercedes and need other elements from the same group, such as steering column switches, control modules, or additional ignition elements, check the available parts in the Mercedes switches, control elements and ignition locks category.

More about used Mercedes parts

When choosing a used ignition lock, it is worth knowing the specifics of original components from dismantling in cars of this brand. Practical tips on selecting and the advantages of such solutions can be found in the article Used parts for Mercedes – original components from dismantling, which discusses, among other things, the cost-effectiveness of using factory elements instead of new replacements.

Additionally, if you are considering different repair options, the guide 5 reasons why a used OEM part is a better choice than a replacement may be helpful, explaining when it is worth choosing an original second-hand component to maintain the functionality and durability of the control system in your Mercedes.