Mercedes W213 C238 Fuse Box Relay Control Unit Module A2135400414

Mercedes W213 C238 Fuse Box Relay Control Unit Module is an original component from the Fuses and fuse boxes category, designed for use in the electrical system of Mercedes E-Class and E-Class Coupé/Cabrio vehicles. This used, factory-original unit ensures proper circuit organization, stable power supply to electrical consumers, and facilitates the diagnosis of electrical faults.

Specifications and technical data

• SKU: A2135400414
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2135400414
• Substitutable numbers: A2135400414, A 213 540 04 14
• Category: Fuses & Fuse Boxes

Purpose and function in the vehicle

The fuse box in Mercedes W213 and C238 models serves as a central power distribution point for numerous electrical components. It is responsible for:

• distributing voltage to individual circuits of the electrical system,
• protecting systems against overloads and short circuits,
• clearly grouping fuses and relays within a single module.

Thanks to its factory design, the module maintains compatibility with the original electrical schematic, which facilitates servicing, measurements, and future equipment upgrades.

Construction and electrical compatibility

The original fuse box for Mercedes has been designed as a component perfectly matched to the electrical architecture of the W213/C238 platform. The sockets, connectors, and fuse slots are arranged in accordance with factory documentation, which allows for:

• secure seating of electrical harnesses without modifications,
• maintaining the correct order and ratings of fuses,
• easy service access to individual power paths.

This solution reduces the risk of installation errors and ensures consistency with the vehicle's control systems.

Benefits of using an original fuse box

Using a used, factory-original module offers a number of practical advantages in daily operation:

• Full integration with the Mercedes electrical system – maintaining the original wiring layout and protection logic.
• Stable operation of comfort, lighting, and safety systems due to proper power distribution.
• Simplified diagnostics – a mechanic or auto electrician can use factory schematics without the need for adaptations.
• Reduced repair costs compared to purchasing a new module while maintaining compatibility with the vehicle's equipment.

Condition, installation, and service application

The item comes from disassembly and is offered as a used Mercedes fuse box, which allows for an economical repair of the electrical system following mechanical damage, flooding, or overheating of the previous module. Installation involves transferring the harnesses and fuses in accordance with the service documentation for the specific vehicle.

Replacing the fuse box is particularly recommended when there are issues with power supply to multiple circuits simultaneously, signs of corrosion on contacts, or damage to the housing affecting protection against moisture and dirt.

If you are planning a comprehensive repair or upgrade of the electrical system area in your Mercedes and need other components from the same group, such as fuse sockets, distribution modules, or additional housings, check out the available parts in the Mercedes Fuses and fuse boxes category.

Additional technical support

When working on electrical systems and comfort power supply, it is also worth ensuring the efficiency of systems responsible for cabin conditions. Practical tips on selecting used OEM components, service schedules, and inspection procedures can be found in the article Air conditioning and heating – part selection and maintenance for year-round comfort, which can complement your knowledge when planning broader service work.