Mercedes E W211 Petrol Engine Starter Alternator Electrical Cable A2115400430

Mercedes E W211 Petrol Engine Starter Alternator Electrical Cable is an original electrical system component, designed specifically for petrol-powered units. It enables a stable connection between the starter and the alternator with the vehicle's electrical system, which translates into reliable engine starting and proper battery charging during daily operation.

Specifications and technical data

• SKU: A2115400430
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115400430
• Substitutable numbers: A2115400430, A 211 540 04 30, AS
• Fuel type: Petrol
• Category: Other Starters, Alternators, ECUs & Wiring

Application in Mercedes E W211 with a petrol engine

The presented cable is intended for the electrical system in the Mercedes E-Class W211 model with a petrol engine. It is responsible for transmitting starting current to the starter and energy generated by the alternator to the onboard electrical system; therefore, its correct selection has a direct impact on engine starting reliability and the stability of power supply to electrical consumers.

Thanks to a design compliant with Mercedes factory standards, the cable maintains the correct routing geometry in the engine bay, which reduces the risk of abrasion, overheating, and unwanted voltage drops.

Construction and function of the starter and alternator cable

The cable connects key components of the electrical system – the starter, the alternator, and the vehicle's wiring – into one coherent current path. In practice, this means:

• an appropriate conductor cross-section, adapted to high starting currents,
• insulation adapted for operation in the engine bay, exposed to temperature and vibrations,
• factory-fitted terminals enabling a secure, stable connection with the components.

An element configured in this way helps to reduce voltage drops during starting, which is particularly important in modern petrol units where control systems are sensitive to power quality.

Benefits of using an original used cable

Using an original cable from Mercedes ensures compatibility with the factory installation without the need for modifications or fitting universal replacements. You receive a component with parameters specified by the vehicle manufacturer, which facilitates installation and minimizes the risk of operational issues.

A used cable of this type is a sensible choice for repairs to the starting and charging system when you want to maintain the original specification while optimizing service costs. It works well both when replacing a damaged section of the wiring harness and when comprehensively refreshing the installation in an older W211 unit.

Practical installation and diagnostic tips

When replacing the starter and alternator cable, it is worth paying attention to:

• the condition of ground points and terminals – loose or corroded connections can cause starting problems,
• routing the cable in factory clips, away from sharp edges and high-temperature components,
• checking the charging voltage after installation to confirm proper alternator operation and the absence of excessive voltage drops.

Such an approach allows you to fully utilize the potential of the cable and ensure stable operation of the electrical system in your Mercedes E W211 with a petrol engine.

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 harnesses, power cables, or service connectors, check the available parts in the Other Mercedes category.

Technical support and knowledge about powertrains

When working with the starting and charging system, it is worth understanding the differences in the design of modern power units and their accessories. If you are interested in a broader context of how engines, power supply systems, and accessories work in high-end cars, take a look at the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the specifics of engines, brakes, and chassis in powerful RS versions.