Mercedes W177 Single USB C Charging Port Socket Connection Unit A2478207302

Mercedes W177 Single USB C Charging Port Socket Connection Unit is an original component from the Electronic control modules and drivers group, designed for powering and communicating with mobile devices in the cabin. It ensures a stable connection, consistent with the Mercedes electrical architecture, which translates into seamless integration with the vehicle's installation.

Specifications and technical data

• SKU: A2478207302
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2478207302
• Substitutable numbers: A2478207302, A 247 820 73 02
• Category: ECUs & Computer Modules

Purpose and function in the electrical system

The presented USB‑C socket serves as a dedicated charging and data transmission point in the Mercedes W177 class onboard system. As a component classified under Electronic control modules and drivers, it works with the vehicle's low-voltage installation, enabling safe charging of smartphones, navigation systems, or other electronic accessories.

The module is designed for a specific interior architecture, ensuring it maintains factory ergonomics and the aesthetics of the center console or tunnel, depending on the equipment version. A properly selected USB‑C connector ensures a secure plug fit and reduces the risk of charging interruptions while driving.

Benefits of using an original USB‑C socket

Using an original charging socket in a Mercedes W177 allows for maintaining the electrical and communication consistency of the entire infotainment system. The appropriate current characteristics and matching to the wiring harness minimize the risk of overheating, voltage drops, or interference with the operation of other electronic modules.

Key advantages include:

• factory fitment to the vehicle's installation and mounts,
• stable charging of mobile devices while driving,
• preservation of the original look and functionality of the interior,
• easier diagnostics in the event of potential electrical faults.

Integration with Mercedes onboard systems

The USB‑C socket works with factory multimedia systems, enabling power supply and – depending on the vehicle configuration – data transmission to the control unit. This allows for the use of features such as music playback, mobile app integration, or software updates, while maintaining the manufacturer's safety standards.

As an element from the electronic control modules group, the module is adapted to operate in an environment with increased temperature and vibration requirements, typical for a vehicle interior. The proper connector design limits mechanical wear and ensures repeatable electrical contact parameters.

Using a used part in service and retrofitting

Choosing a used USB‑C socket for a Mercedes allows for an economical repair or restoration of factory functionality without the need to interfere with the original wiring harness. This solution is particularly useful when replacing a damaged port, restoring system efficiency after liquid damage, or upgrading the interior while maintaining original components.

In service practice, such a module works well both for standard replacement and for work related to retrofitting the vehicle with additional charging points, provided the car's configuration allows it. Maintaining the original manufacturer's specification promotes trouble-free operation and facilitates subsequent computer diagnostics.

If you are planning a comprehensive repair or upgrade of the cockpit area in your Mercedes and need other elements from the same group, such as power modules, comfort controllers, or multimedia units, check the available parts in the Mercedes Electronic control modules and drivers category.

To compare how other premium manufacturers approach maintaining brand character and the role of original electronic components in driving quality and multimedia operation, it is worth reading the article Audi and pure emotion. How do used parts help maintain the brand's DNA?, which shows how important properly selected modules and equipment elements are when servicing premium class cars.