Door Module Mercedes W204 W212 Front Right O/S Control Unit A2129004314

The Mercedes W204 W212 Front Right Door Module is an item from the Electronic Control Modules and Controllers category, designed to manage the electrical system in the front right door. It enables proper functioning of comfort systems and communication with other vehicle controllers, ensuring stable operation of door functions on the driver's or passenger's side – depending on the body version.

Specifications and technical data

• SKU: A2129004314
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2129004314
• Substitutable numbers: A2129004314, A 212 900 43 14, KZ
• Location on the vehicle: Front, Right
• Category: ECUs & Computer Modules

Door Module Purpose and Function

The offered module is dedicated for installation on the front, right side of the vehicle. As part of the comfort system, it is responsible for controlling selected electrical functions within the door, cooperating with the vehicle's wiring and other body controllers. This allows for correct communication within the car's electronic network and maintains consistent operation of systems on the front right door panel.

Benefits of Using an Original Mercedes Module

The module comes from the Mercedes offering, which means it retains the factory control logic and is tailored to the electrical architecture of the W204 and W212 models. Using an original door controller allows you to:

• maintain compatibility with the vehicle's factory equipment configuration,
• minimize the risk of communication errors in the electronic network,
• facilitate diagnostics using standard service tools,
• ensure predictable behavior of comfort systems on the front right side.

As an item from the Electronic Control Modules and Controllers group, the door module is an essential component of the entire body function management system, making its selection based on vehicle compatibility crucial.

Product Characteristics and Installation

The presented controller is a used part, sourced from dismantling, which offers a cost-effective solution while maintaining the original manufacturer's specifications. Module installation requires matching it to the front right door wiring and considering the specific equipment configuration of the car (e.g., differences in body versions, markets, or equipment packages).

Before installation, it is recommended to:

• verify compatibility based on manufacturer markings and OEM part number,
• check the placement on the vehicle – the module is intended exclusively for the front right side,
• perform post-installation diagnostics to confirm correct communication with other controllers.

Selection by OEM Number and Compatibility

Proper selection of the door module for a specific Mercedes W204 or W212 should be based on the OEM part number and any interchangeable numbers. This helps avoid hardware and software compatibility issues and reduces the risk of errors in the vehicle's electronic system. If in doubt, it is advisable to consult the VIN and service documentation to match the controller to the specific equipment version.

If you want to understand the principles of selecting and installing used controllers more broadly, you will find practical tips in the guide: used car electronics – why choose second-hand modules and sensors. The article discusses, among other things, compatibility issues, OEM markings, and installation procedures.

Expansion of Mercedes Control Module Offer

If you are also looking for other Mercedes Electronic Control Modules and Controllers for your car, check out our dedicated category: Mercedes Electronic Control Modules and Controllers. There you will find a wide selection of body controllers, comfort modules, and other electronic components tailored to various models of this brand.