Mercedes C207 W207 W212 Fuel Pump Module Diesel Control Unit ECU A2124400414

Mercedes C207 W207 W212 Fuel Pump Module Diesel Control Unit ECU is a specialized component from the Electronic control modules and controllers category, designed for precise management of fuel pump operation in diesel engines. It enables stable diesel fuel dosing, supporting the correct operation of the fuel supply system and reducing the risk of malfunctions in the powertrain. This is a solution for users looking for proven electronics for Mercedes vehicles with a diesel engine.

Specifications and technical data

• SKU: A2124400414
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2124400414
• Substitutable numbers: A2124400414, A 212 440 04 14, 5WK49694CBF
• Fuel type: Diesel
• Category: ECUs & Computer Modules

Function and role of the fuel pump control module

The described controller is responsible for the electronic control of the fuel pump in the diesel engine supply system. It analyzes signals from the vehicle's electrical system and regulates the pump's operation based on them to ensure the correct pressure and amount of fuel delivered to the injection system. Thanks to this, the engine can run smoothly, and the response to load and changing driving conditions remains predictable.

In Mercedes C207, W207, and W212 series vehicles, a properly functioning fuel pump controller is essential for stable starting, smooth idle operation, and maintaining power across the entire rev range. A functional electronic module also helps reduce the risk of sudden engine stalling due to interruptions in fuel supply.

Designed for Diesel engines

The module has been designed to work with the fuel supply system in diesel-powered vehicles. The operating characteristics of the controller are adapted to the requirements of diesel engines, where maintaining the correct fuel pressure across a wide range of temperatures and loads is crucial. Compatibility with Diesel fuel type means that the control algorithms and operating parameters of the module are optimized for the specifics of injection in this type of engine.

In practice, this translates into better stability of the injection system, correct cooperation with the vehicle's other electronics, and greater resistance to operational loads typical for diesel units.

Benefits of using a pre-owned Mercedes module

The presented item belongs to the group of original solutions used in Mercedes vehicles, which promotes proper fitment with the electrical installation and onboard system architecture. An original electronic module usually provides better compatibility with the factory wiring, software, and other controllers than universal replacements.

Choosing a pre-owned fuel pump controller is a reasonable way to reduce repair costs while maintaining compliance with the manufacturer's factory standards. This type of component is particularly attractive for premium class vehicles, where new electronic parts can be significantly more expensive. An additional advantage is the ability to match the part by OEM number or interchangeable numbers, which facilitates the selection of the correct module for a specific car configuration.

Selection, installation, and compatibility

Before installing the fuel pump controller in a Mercedes C207, W207, or W212, it is worth verifying compatibility with your specific vehicle using the OEM number, reference numbers, or catalog data. This helps avoid communication problems on the bus and ensures correct cooperation with the existing controller software in the car. A correctly selected module facilitates the installation process and limits the need for additional installation modifications.

The installation itself should be entrusted to a person with experience in automotive electronics, due to the need to maintain the correct sequence of disconnecting and connecting the power supply and potential adaptation in the diagnostic system. Proper execution of these steps reduces the risk of damaging the component and ensures stable operation of the fuel supply system after replacement.

More about pre-owned electronics and Mercedes parts

If you are planning a comprehensive repair or upgrade of the fuel supply area in your Mercedes and need other elements from the same group, such as controllers, engine management modules, or auxiliary controllers, check the available parts in the Mercedes electronic control modules and controllers category.

To better understand how to safely choose pre-owned electronic modules, including fuel pump controllers, and what to pay attention to when selecting by OEM number and hardware-software compatibility, it is worth reading the guide: Pre-owned automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Additional information about trends related to the use of pre-owned original components in premium cars, including Mercedes models, is also provided in the article: Crisis in the new parts market? Why in 2026 pre-owned originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend.