Mercedes-Benz W639 Battery Starter Alternator Positive Plus Cable A6395408610

The Mercedes-Benz W639 Starter and Alternator Positive Cable is an original electrical system component responsible for a secure connection between the battery and the starting and charging system. Thanks to its factory Mercedes design, the cable ensures stable operating parameters, proper current flow for starting, and safe integration with the vehicle's electrical system. This is a practical solution for users who want to maintain the original electrical architecture of their Mercedes W639.

Specifications and technical data

• SKU: rhd-A6395408610
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6395408610
• Substitutable numbers: A6395408610, A 639 540 86 10, KZ
• Category: Wiring Harnesses, Cables & Connectors

Purpose and Function in the Electrical System

The offered cable belongs to the group Cables, Harnesses, and Connectors and is designed to operate in the high-current circuit between the battery, starter, and alternator. It is responsible for:

• transferring high starting currents when starting the engine,
• stable power supply to the starter under demanding operating conditions,
• safe discharge of charging energy from the alternator to the battery,
• maintaining correct voltage drops throughout the circuit.

Factory fitment for the Mercedes-Benz W639 platform allows for maintaining the correct cable routing geometry, which reduces the risk of chafing, overheating, and unwanted mechanical stress.

Original Mercedes Manufacturing and Compatibility

The cable was developed by Mercedes as part of the power and starting system, ensuring compatibility with factory mounting points, cross-sections, and connector types. This means:

• easier installation in place of a worn or damaged cable,
• no need for electrical system modifications,
• consistency with other harness components in the engine bay.

Original connectors and current terminals are adapted to factory clamps, promoting reliable electrical contact and reducing the risk of localized overheating at connections.

Performance Characteristics and Application Benefits

As an original component from the high-current cable group, the positive cable in the Mercedes-Benz W639 is designed for long-term operation in varying thermal and mechanical conditions. In practice, this means:

• appropriately selected cable flexibility, facilitating routing in tight spaces,
• insulation adapted for operation at elevated temperatures in the engine bay,
• a structure optimized to reduce voltage drops during starting.

For the user, this translates to more stable starting and predictable behavior of the charging system, especially in vehicles with intensive use or extensive electrical equipment.

Condition, Selection, and Service Application

The item is offered in used condition, allowing for an economical replacement of the cable while maintaining the original manufacturer's specifications. This solution is particularly beneficial in situations where the existing cable shows signs of wear, such as:

• signs of insulation overheating,
• oxidation or damage to current terminals,
• mechanical chafing in routing areas.

Selecting the correct cable for a specific vehicle configuration is facilitated by the manufacturer's marking and assignment to the W639 platform, which minimizes the risk of installation incompatibility and helps maintain the integrity of the entire electrical harness.

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 power cables, engine harnesses, or high-current connectors, check the available parts in the Mercedes Cables, Harnesses, and Connectors category.

For drivers considering broader use of used parts and wanting to better understand the benefits of such a solution, a guide article on the advantages of using used components in premium cars, discussing economic and operational aspects, may be helpful.