Mercedes E-Class S211 Touring Positive Battery Terminal A2115456540 A2115450403

Mercedes E-Class S211 Touring Positive Battery Terminal is an original electrical system component designed for the rear right section of the vehicle. It ensures a stable, secure connection between the positive battery terminal and the car's electrical system, which is crucial for reliable starting and the operation of all onboard systems. Choosing an original Mercedes solution guarantees consistency with the factory electrical architecture and a proper fit for the S211 estate body style.

Specifications and technical data

• SKU: A2115456540
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115456540
• Substitutable numbers: A2115456540, A 2115456540, A 211 545 65 40, A2115450403, A 2115450403, A 211 545 04 03, EM
• Location on the vehicle: Rear, Right
• Category: Batteries

Purpose and function in the electrical system

The presented positive battery terminal has been designed specifically for the S211 generation E-Class estate version, with placement in the rear right part of the vehicle. It is responsible for a secure, low-resistance connection of the power cable to the positive battery pole, which is essential for:

• stable power supply to the starter and main energy consumers,
• maintaining correct voltage parameters throughout the entire installation,
• reducing energy losses at connection points,
• maintaining compliance with factory wiring routing in the estate body.

The dedicated placement on the vehicle allows for maintaining the original cable routing and proper mounting, which facilitates service and subsequent diagnostics of the electrical system.

Construction and fitment for Mercedes E-Class S211 Touring

The discussed positive terminal has been developed as a system component that works with the factory wiring harness and mounting system in the trunk. As a result, installation is orderly, without the need for modifications or the use of adapters. The terminal's design accounts for:

• geometry adapted to the rear right part of the body,
• suitability for serial power cable routing,
• maintaining appropriate distances from body components and upholstery.

Such a solution promotes the clarity of the installation, facilitates service access, and minimizes the risk of incorrect cable positioning, which is important from the perspective of operational safety.

Benefits of using the original positive terminal

Using the original positive battery terminal in a Mercedes E-Class S211 Touring brings a number of practical benefits. The most important include:

• Compatibility with the factory installation – the component is designed for a specific platform, which limits the risk of fitment issues.
• Consistency with electrical protection systems – a proper connection of the positive pole is crucial for the correct operation of protection devices and control modules.
• Maintenance of service clarity – the mechanic deals with a system consistent with the manufacturer's documentation, which speeds up diagnostics.
• Reduction of potential voltage drops – a properly selected terminal helps maintain stable power supply parameters.

For users who pay attention to the technical correctness of repairs, choosing an original solution is an important element of ensuring long-term, predictable operation of the electrical system.

Condition, service application, and part selection

The offered component comes from a Mercedes vehicle and is intended for re-installation in E-Class S211 Touring models, in the rear right part of the luggage compartment. It works well both when replacing a damaged terminal and during comprehensive maintenance of the power supply system, for example, after work related to the battery or wiring harness.

Before purchasing, it is worth verifying compatibility with your specific vehicle using the manufacturer's markings and catalog data. This allows for precisely selecting a component that will work with the existing installation without the need for modifications.

Expanding Mercedes power system maintenance

If you are planning a comprehensive repair or upgrade of the power supply and energy storage area in your Mercedes and need other components from the same group, such as power cables, mounts, or battery covers, check the available parts in the Mercedes Batteries category.

For drivers interested in deepening their knowledge regarding the diagnostics of diesel engine power systems, materials concerning injector operation may also be useful. In this context, it is worth reading the article Diesel injector faults – how to recognize them and what are the risks of neglecting them, which discusses symptoms, consequences, and basic diagnostic methods.