Door Module Mercedes W169 W245 Control Unit Rear Left N/S ECU A1698203185

Visual condition of the part

The product shows signs of use visible in the photos.

Door Module Mercedes W169 W245 Control Unit Rear Left N/S ECU is a specialized component from the Electronic control modules and controllers category, responsible for operating the rear left door functions in selected Mercedes models. This used OEM component allows for a technically correct replacement of a damaged module while maintaining factory control logic and communication within the vehicle's electrical system.

Specifications and technical data

• SKU: A1698203185-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1698203185
• Substitutable numbers: A1698203185, A 169 820 31 85
• Location on the vehicle: Rear, Left
• Category: ECUs & Computer Modules

Purpose and function of the door module

The presented module is designed for installation in the rear left door area of Mercedes W169 and W245 series vehicles. It is responsible for controlling and monitoring the components located in the door, integrating them with the car's main electrical system. This enables proper cooperation with other body controllers and ensures consistent operation of comfort systems.

Key technical features

As a component from the Electronic control modules and controllers category, the door module communicates with the vehicle's installation via a dedicated harness and data bus, in accordance with Mercedes' factory architecture. The vehicle placement specified as rear – left side ensures clear identification of the mounting position, which facilitates the selection of the correct component for replacement.

The used door controller allows for the preservation of the original electrical system configuration, and its design is adapted to the specific requirements of the W169 and W245 models, both in terms of housing shape and mounting method within the door structure.

Service application and installation

The module is intended for service applications as a replacement for the factory-installed controller in the rear left door. It is particularly useful in situations where there are problems with the operation of electrical components in this area, and diagnostics indicate a failure of the local controller. Thanks to the preservation of the original manufacturer's specifications, it is possible to match it to the existing installation without the need for modifying harnesses or mounts.

Before installation, it is recommended to verify the module's compatibility with the vehicle based on technical data and equipment configuration, as well as to perform adaptation or coding if required by the service procedures for the given model.

Why choose a used Mercedes door module

Choosing a used door module for a Mercedes allows for reduced repair costs while maintaining compliance with the vehicle's factory electrical architecture. An original controller from the same model group ensures proper fit in terms of construction and functionality, which is essential for the stable operation of comfort systems and communication between controllers.

If you want to better understand when choosing used automotive electronics is justified and how to safely select such components, it is worth reading our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

Additionally, to dispel any doubts regarding the quality and durability of used components, the following article may be helpful: Used car parts: Myths and facts you need to know.

Expanding the control system in your Mercedes

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