Mercedes W166 Map Card Fuse Box Grouping Diagram A1660080799

Mercedes W166 Map Card Fuse Box Grouping Diagram is a specialized fuse box grouping map card designed for W166 series models. It facilitates the quick location of the correct circuit, which speeds up diagnostics and electrical system maintenance in your Mercedes. Thanks to this component, working on the protection system becomes more organized, clear, and safe for electrical components.

Specifications and technical data

• SKU: A1660080799
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1660080799
• Substitutable numbers: A1660080799, A 166 008 07 99
• Category: Fuses & Fuse Boxes

Purpose and function in the electrical system

The presented diagram is a component from the Fuses and fuse boxes group, responsible for clear labeling and logical grouping of circuits in the fuse box. Thanks to it, you can:

• easily assign a specific fuse to a given circuit or module,
• minimize the risk of errors when replacing fuses,
• streamline the diagnostics of electrical faults,
• maintain order in the vehicle's service documentation.

This is a practical solution for both workshops and individual users who service the electrical system in their Mercedes W166 themselves.

Benefits of using the original diagram

Using the original fuse box mapping card ensures:

• Full compatibility with the factory layout – the markings correspond to the actual arrangement of circuits in the given type of box.
• Clarity and consistency of markings – it facilitates work for mechanics and electricians who are familiar with the standards used by the Mercedes brand.
• Better control over modifications – when expanding or upgrading the installation, it is easier to maintain order in circuit assignments.

For vehicles used intensively, where work on the electrical system is frequently performed, such a component significantly improves service ergonomics and reduces the risk of maintenance errors.

Product condition and service application

The item comes from the secondary market, making it an attractive solution for users looking for an economical yet factory-compliant option for repair or restoration work. It is particularly useful in situations where:

• the original diagram has been damaged or worn out,
• the vehicle has been modified and it is necessary to restore the factory order in the fuse box,
• diagnostic work is being carried out that requires frequent access to the fuses.

By maintaining the original form and layout of the descriptions, the card allows you to restore clarity in the fuse compartment without the need to create your own, less legible markings.

Application in workshop practice

In a professional Mercedes service, as well as in a well-equipped garage, such a diagram is real support for:

• locating circuits powering individual comfort modules, lighting, or assistance systems,
• verifying the correctness of fuse value selection,
• creating documentation for repairs and modifications of the electrical system.

Clear markings on the card help maintain consistency with the manufacturer's service documentation, which is particularly important for long-term vehicle maintenance.

Expanding the protection system in a 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 additional inserts, distribution modules, or box covers, check out the available parts in the Mercedes Fuses and fuse boxes category.

For a better understanding of how powertrains and related protection systems work in premium cars, you can also read an article describing various all-wheel-drive solutions – xDrive, 4Matic, quattro, or 4Motion – a comparison of AWD systems from BMW, Mercedes, Audi, and VW, which discusses, among other things, typical components and the approach to service in vehicles with advanced electronics.