Mercedes W166 Fuse Box Relay Cover Shield Cap Trim A1665400180

Mercedes W166 Fuse Box Housing Cover A1665400180 is an original electrical system component from the Fuses and Fuse Boxes group, designed for W166 series models. This robust housing ensures stable mounting of the fuse box and helps protect critical electrical components from mechanical damage. A used OEM part is a sensible choice for electrical system servicing when you prioritize factory fit and predictable installation.

Specifications and technical data

• SKU: A1665400180
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1665400180
• Substitutable numbers: A1665400180, A 166 540 01 80
• Category: Fuses & Fuse Boxes

Purpose and Technical Function

The fuse box housing cover in the Mercedes W166 is responsible for the correct positioning and protection of the fuse module within the vehicle's compartment. A properly selected component:

• stabilizes the fuse box in its designated location by the manufacturer,
• reduces the risk of connector and wire loosening due to body vibrations,
• supports the protection of electrical components against accidental mechanical damage.

Thanks to the preservation of the original housing geometry, installation is predictable, without the need for modifications or adjustments to the mounting points.

Benefits of Using an Original Cover

Using the original fuse box cover in the Mercedes W166 translates into a range of practical servicing and operational benefits:

• Factory Fit – maintains compatibility with the body structure and electrical system, facilitating installation and subsequent servicing.
• Electrical System Consistency – proper routing of harnesses and connectors minimizes the risk of wire strain and unwanted looseness.
• Hassle-Free Replacement – a used OEM part allows for economical repair without compromising the manufacturer's original design.

This solution is particularly beneficial for post-accident repairs or replacement of a damaged housing when you want to maintain compliance with service documentation.

Component Condition and Installation Aspects

The fuse box housing cover is offered in a used condition, allowing for an attractive price while maintaining the manufacturer's original specifications. Before installation, a standard visual inspection is recommended to check for any signs of previous use and to ensure it matches the specific vehicle configuration.

During installation, pay attention to:

• correct seating in the body's mounting points,
• proper positioning of the fuse box inside the housing,
• absence of interference with adjacent electrical system components and equipment.

Part Selection by Numbers and Vehicle Compatibility

To ensure full compatibility with your Mercedes W166, it is recommended to match the cover by part number or vehicle data. This approach reduces the risk of purchasing a part with different mounting geometry or a different variant. If in doubt, compare the shape and mounting points with the currently installed housing.

If you want to better understand the differences between original, aftermarket, and used parts and their long-term cost-effectiveness, the following article may be helpful: Original, Aftermarket, or Used Parts – What to Choose for Electrical System Repairs.

Expanding Fuse System Service for Mercedes

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 boxes, inserts, or fuse modules, check the available parts in the Mercedes Fuses and Fuse Boxes category.