Mercedes W204 Coupe Door Module Front Left N/S Control Unit A2049001206

The Mercedes W204 Coupe Left Front Door Module is a specialized component from the Electronic Control Modules and Controllers group, responsible for managing the driver's door functions in a coupe body style. It ensures the correct operation of electrical systems in the front left door, providing stable control and consistent communication with the vehicle's wiring harness.

Specifications and technical data

• SKU: A2049001206
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049001206
• Substitutable numbers: A2049001206, A 204 900 12 06
• Location on the vehicle: Front, Left
• Category: ECUs & Computer Modules

Door Module Purpose and Function

The offered module is designed for the front – left side area of Mercedes W204 Coupe models. As an electronic component, it manages signals within the driver's door, integrating with the body's electrical system and other vehicle controllers. A properly functioning door module is crucial for maintaining the full functionality of the electrical systems in this area.

Benefits of Using an Original Mercedes Module

This module comes from the Mercedes brand, meaning it adheres to factory manufacturing standards and fitment. Using an original controller from the same design group allows for:

• maintaining compatibility with the vehicle's electrical system,
• ensuring consistent communication with other body control modules,
• reducing the risk of diagnostic errors caused by incorrect part selection,
• easier configuration and potential adaptation in the vehicle.

Technical Characteristics and Installation

The module belongs to the Electronic Control Modules and Controllers group, meaning it communicates via the vehicle's data bus and other control units. Its placement on the vehicle is specified as Front, Left, which aids in unambiguous identification of the mounting position and selection of the correct part for a specific body configuration.

The product is offered as Used, which means it comes from a dismantled vehicle and is intended for reinstallation after prior condition verification. For correct selection, it is recommended to compare the part numbers with the existing controller and verify compatibility with the vehicle's equipment configuration.

Selection by Part Numbers and Electronics Compatibility

The module has an assigned OEM Part Number and available interchangeable numbers, allowing for precise selection of the component for a specific Mercedes W204 Coupe version. For body electronics, matching hardware and software parameters is particularly important to avoid communication issues within the vehicle network.

To better understand the principles of selecting and installing used controllers, it is worth consulting the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECU Modules and Sensors?. The article discusses, among other things, OEM part number selection, compatibility issues, and practical installation tips.

Application in Service Practice

Replacing the door module in a Mercedes W204 Coupe is a common service procedure when electrical faults occur in the driver's door area. Using the correct controller from the same design group allows for restoring proper system operation without the need for intervention in the wiring harness or modifications to the installation. For workshops and users, this means a more predictable repair process and the possibility of using proven, used electronics.

If you are planning a comprehensive repair or upgrade of the body electronics in your Mercedes and need other parts from the same group, such as comfort controllers, passenger door modules, or lighting control units, check the available parts in the Mercedes Electronic Control Modules and Controllers category.