Mercedes W177 W247 Battery Cable Negative Lead Terminal Harness A1775402500

Mercedes W177 W247 Battery Cable Negative Lead Terminal Harness is an original electrical system component designed for professional maintenance of the power supply system in vehicles of this series. As part of the Battery Accessories group, it is responsible for a stable ground connection, which has a direct impact on the reliability of starting and the operation of all electronic systems. A used, original ground cable is a sensible choice for system maintenance when a secure fit and the preservation of factory parameters are essential.

Specifications and technical data

• SKU: A1775402500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1775402500
• Substitutable numbers: A1775402500, A 177 540 25 00
• Category: Battery Accessories

Function and application of the ground cable

The ground cable in Mercedes W177 and W247 models plays a key role in the battery power circuit, providing a low-resistance connection between the negative terminal and the vehicle's body and structural components. A properly selected cable:

• stabilizes the operation of the starter and charging system,
• reduces voltage drops in the electrical system,
• minimizes the risk of interference in the operation of controllers and comfort modules,
• supports the correct functioning of safety systems and driving assistants.

Thanks to its factory fit for the specific body platform, the cable maintains the correct length, cross-section, and mounting points, which facilitates installation and eliminates the need for system modifications.

Construction and compatibility with Mercedes W177 / W247

Mercedes W177 W247 Battery Cable Negative Lead Terminal Harness has been designed as an installation element dedicated to the specific electrical architecture of these models. This means that:

• the geometry of the cable is adapted to the factory harness routing in the engine bay or battery compartment,
• the used eyelet terminals and connectors are compatible with the original connection points,
• the insulation and shielding of the cable are selected for the thermal and mechanical conditions in the given area of the vehicle.

Such a solution allows for maintaining consistency with the original electrical system design, which is particularly important in modern Mercedes vehicles, where the power system works with extensive onboard electronics.

Benefits of using an original ground cable

Choosing an original ground cable from the Battery Accessories group brings measurable service and operational benefits:

• a secure fit for the specific model without the need to fabricate terminals or shorten the cable,
• preservation of the starting current conduction characteristics designed by the manufacturer,
• reduction of the risk of overheating ground connections under heavy loads,
• easier diagnostics of potential system faults thanks to the use of a component compliant with service documentation.

For workshops and users, this means more predictable installation and a lower risk of starting problems or random electronic errors resulting from an improper ground connection.

Condition of the component and installation aspects

The offered cable is a used component, which allows for combining an attractive cost with the preservation of the manufacturer's original design. Before installation, it is recommended to perform a standard inspection of contact surfaces, mounting points, and insulation to ensure proper electrical contact and adequate protection against corrosion. In most cases, installation involves removing the old cable and installing the new one at the existing connection points, while following the battery disconnection and connection sequence in accordance with service procedures.

Expanding Mercedes power system service

If you are planning a comprehensive repair or upgrade of the power and ground area in your Mercedes and need other components from the same group, such as ground cables, terminals, or connection covers, check out the available parts in the Mercedes Battery Accessories category.

More on reducing vehicle downtime

When planning the replacement of electrical system components, it is worth considering the availability of parts from a single warehouse, which significantly reduces the vehicle's downtime at the workshop. If you want to learn how a wide range of professional used parts affects repair speed, read the article No more weeks of waiting – how a wide assortment in one warehouse really reduces your car's downtime at the mechanic's?.