Mercedes W169 Key Reader Ignition Lock Remote Control Unit Module A1695451708

The Mercedes W169 Ignition Switch and Key Reader Module is an original component of the starting system, responsible for precise key recognition and ignition control. Thanks to its factory design for the W169 A-Class, it ensures correct cooperation with the vehicle's electronics and maintains full functionality of the remote control. This is a practical solution for diagnosing problems with engine starting or key communication with the car.

Specifications and technical data

• SKU: A1695451708-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1695451708
• Substitutable numbers: A1695451708, A 169 545 17 08
• Category: Switches & Controls

Purpose and Function in the Vehicle

The presented module belongs to the group of Switches, Control Elements, and Ignition Switches and is dedicated to Mercedes A-Class W169 generation models. This assembly integrates the key reader function, ignition switch lock, and ignition control, cooperating with the body electronics and immobilizer system.

In practice, this means the component is responsible for, among other things:

• recognizing the coded key inserted into the ignition switch,
• transmitting a signal to the ignition and starting control systems,
• operating remote control functions, according to the vehicle's configuration,
• maintaining consistency with the factory electrical architecture of Mercedes.

Construction and Integration with Mercedes Electronics

The ignition switch module for the W169 is designed as an OEM component, ensuring full compatibility with the electrical installation and communication bus in this model. The construction includes both the mechanical part (key socket and lock) and the electronic part responsible for communication with other control units in the vehicle.

Thanks to this, with correct selection for a specific vehicle version, it is possible to maintain factory comfort and safety functions, without the need for universal solutions or installation adaptations.

Service Application and Benefits of Installation

Replacing the ignition switch and key reader module is particularly recommended in situations where there are problems with starting, a key error message, or unstable ignition system operation. Using an original used part allows for:

• restoring correct communication between the key and the vehicle's electronics,
• reducing the risk of random engine starting problems,
• maintaining factory operating parameters of the control system,
• optimizing repair costs compared to purchasing a new module.

As a used part, the module offers a reasonable compromise between quality and cost, especially for older W169 A-Class models, where an economical but still technically correct repair is important.

Condition and Selection of the Correct Part

The offered module is from a dismantled vehicle and has the status of an original used Mercedes component. Before installation, it is recommended to verify compatibility with the specific vehicle equipment version and consult with a car electrician or a service specializing in the Mercedes brand to ensure proper adaptation in the car.

Correct selection of the part for the vehicle's chassis number and configuration helps avoid control unit communication problems and ensures stable operation of the starting system in daily use.

If you are planning a comprehensive repair or upgrade of the ignition control area in your Mercedes and need other parts from the same group, such as ignition switches, steering column switches, or control modules, check the available parts in the category Mercedes Switches, Control Elements, and Ignition Switches.

More About Used Mercedes Parts

When choosing original parts from dismantling, it is worth learning about the specifics of components used in this brand's cars and the benefits of using OEM components instead of universal aftermarket parts. A detailed discussion of this topic, along with examples of popular comfort and electronics systems, can be found in the article: Used Mercedes Parts – Original Parts from Dismantling.