Mercedes-Benz A B W169 W245 Front Left Door N/S Control Unit Module A1699000100

The Mercedes W169 W245 Left Front Door Module is a specialized component from the Electronic Control Modules and Controllers category, designed to manage the driver's door functions in Mercedes compact class vehicles. It ensures the proper operation of electrical systems in the left front door, providing stable communication with the vehicle's wiring and enhancing daily usability.

Specifications and technical data

• SKU: A1699000100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1699000100
• Substitutable numbers: A1699000100, A 169 900 01 00
• Location on the vehicle: Front, Left
• Category: ECUs & Computer Modules

Door Module Purpose and Function

The offered module is dedicated for installation in the left front door panel of W169 and W245 series vehicles. As part of the body electronics management system, it is responsible for controlling and monitoring selected door functions, working in conjunction with the car's main electrical system and other onboard controllers.

The vehicle location specified as front – left side allows for unambiguous identification of the mounting position and reduces the risk of errors when selecting parts. This ensures the module can be integrated into the vehicle's existing electrical architecture in an organized manner, compliant with manufacturer specifications.

Benefits of Using an Original Mercedes Module

The door module in this series has been designed by Mercedes as an OEM component, which translates to perfect compatibility with the wiring harnesses, connectors, and control logic used in the factory-installed W169 and W245 models. Using an original solution allows for:

• maintaining the consistency of the vehicle's electronic configuration,
• minimizing the risk of communication errors between controllers,
• preserving predictable operation of the driver's door functions after component replacement.

For workshops and users, this means a more predictable diagnostic process and easier integration with the existing wiring, without the need for harness modifications or the use of substitute solutions.

Installation and Operational Characteristics

Mounting the module in the driver's front door area requires following the correct procedure for removing the trim panel and accessing the electrical connectors. In practice, installation involves:

• disconnecting the vehicle's power supply according to service procedures,
• gaining access to the module within the door structure,
• replacing the controller while maintaining the correct orientation of the connectors.

After installation, it is recommended to verify the door functions and, if necessary, perform adaptations or diagnostics using an appropriate tester. This approach ensures that the electronic control module has been correctly integrated into the vehicle's network.

Product Condition and Application in Service Practice

The component is offered as a used part, providing a cost-effective solution for users and service centers looking for a factory module at a reasonable price, while maintaining compliance with the original manufacturer's specifications. In workshop practice, such a module is suitable for both routine repairs and replacements due to damage to the driver's door electronics.

For extensive bodywork projects, it is advisable to consult expert material on control modules – a good reference point is an article describing the servicing of iDrive systems and controllers in premium segment vehicles: how to care for electronic systems and modules using parts from dismantling. Although it concerns BMW models, it covers universal issues of diagnostics and selection of used controllers.

Mercedes Electronic Control Modules and Controllers – Selection and Alternatives

If you are undertaking a broader service project and also need other components from the Electronic Control Modules and Controllers category for this brand, check out the Mercedes Electronic Control Modules and Controllers available in our assortment. This will facilitate the assembly of a set of controllers from a single, proven product line, contributing to the stable operation of the entire vehicle's electrical system.