Mercedes-Benz C E W124 W202 W210 Air Suspension Reservoir Tank A1403280215

Mercedes-Benz C E W124 W202 W210 Air Suspension Reservoir Tank is a specialized component of the rear axle leveling system, designed for Mercedes mid-size and luxury models. It is responsible for maintaining stable pressure in the system, which translates into more predictable handling, better ride comfort, and safer vehicle behavior under load. This solution is dedicated to users who expect consistent performance of the hydropneumatic suspension and want to restore the factory driving characteristics of their car.

Specifications and technical data

• SKU: A1403280215
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1403280215
• Substitutable numbers: A1403280215, A 140 328 02 15, BG
• Location on the vehicle: Rear
• Category: Other Steering & Suspension Parts

Purpose and function in the suspension system

The Mercedes-Benz C E W124 W202 W210 Air Suspension Reservoir Tank works with the rear axle self-leveling system, acting as a pressure accumulator. Thanks to its precisely selected damping characteristics, it helps maintain a constant ride height regardless of trunk load or the number of passengers. In practice, this means more stable handling, reduced body roll, and improved traction when driving with a load.

The placement of the component at the rear of the vehicle allows for direct interaction with the leveling system actuators, which facilitates diagnostics and service. A properly functioning pressure reservoir reduces the risk of excessive body "floating," improves comfort on uneven surfaces, and supports even tire wear.

Compatibility with Mercedes models

The presented reservoir has been designed with the suspension construction used in popular Mercedes W124, W202, and W210 models in mind. Using a solution consistent with factory design assumptions allows for maintaining the driving characteristics typical of these cars, including comfortable yet predictable rear axle performance.

By maintaining the original geometry and operating parameters of the self-leveling system, the installation of this reservoir is particularly recommended during comprehensive hydropneumatic suspension maintenance – especially when symptoms such as overly soft suspension, body swaying, or loss of stable rear ride height occur.

Component characteristics and advantages of use

The air suspension reservoir tank is a component that operates under demanding conditions – under variable pressure and high dynamic loads. Using a dedicated solution for Mercedes allows for maintaining the correct damping characteristics and adequate pressure reserve in the system. This translates into:

• more stable rear axle behavior during sudden braking and acceleration,
• better vehicle control when fully loaded,
• reduction of impacts and suspension bottoming on uneven surfaces,
• maintaining ride comfort close to the factory level.

The component in used condition is a reasonable choice for budget repairs, especially in older models where the cost-to-effect ratio matters. It allows for restoring the proper operation of the leveling system without the need to invest in a completely new set.

Placement on the vehicle and assembly aspects

The air suspension reservoir tank is intended for installation in the rear of the vehicle, in accordance with the factory layout of lines and mounts. This placement facilitates service access and the inspection of potential leaks. During replacement, it is recommended to simultaneously verify the condition of lines, connectors, and other components of the self-leveling system to fully utilize the potential of the newly installed part.

Selecting the right component for a specific engine and body version should be based on catalog data and manufacturer markings – this helps avoid compatibility issues and ensures proper cooperation with other suspension components.

Expanding knowledge and part selection

If you are planning a comprehensive repair or upgrade of the rear suspension area in your Mercedes and need other elements from the same group, such as pressure accumulators, self-leveling system components, or additional hydraulic parts, check the available parts in the Other Mercedes category.

For a better understanding of the differences in the construction of sports and standard drivetrains and suspensions, as well as the impact of these solutions on component selection, it is worth reading the blog article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the relationships between engine power, brakes, and chassis in high-performance cars.

When planning the service of used suspension components and preparing the car for more difficult operating conditions, the guide Winter essentials: which used car parts are worth checking and replacing before the frost? may also be helpful, containing practical checklists and tips on assessing the condition of components.