Mercedes-Benz E S211 W211 Windscreen Washer Bottle Tank Reservoir A2118691120

Mercedes-Benz E S211 W211 Windscreen Washer Bottle Tank Reservoir is an original windshield cleaning system component designed for the E-Class W211/S211 generation models. Thanks to its factory design, it ensures proper washer fluid delivery, stable mounting in the engine bay, and compatibility with factory pumps and hoses, which facilitates maintenance and subsequent operation.

Specifications and technical data

• SKU: rhd-A2118691120
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2118691120
• Substitutable numbers: A2118691120, A 211 869 11 20, EM
• Category: Additional Wiper & Washer Components

Purpose and function in the washer system

The offered reservoir is a component of the system responsible for storing washer fluid for the windshield and – depending on the vehicle configuration – the rear window as well. Its task is to maintain an adequate amount of fluid, ensure stable pump supply pressure, and provide a leak-proof connection to the hoses leading to the washer nozzles. A properly selected reservoir reduces the risk of leaks, system aeration, and wiper operation issues in difficult weather conditions.

Original fitment for Mercedes-Benz E-Class

Original design for Mercedes-Benz E W211/S211 means correct mounting points, a matching housing shape, and compatibility with the factory layout of components in the engine bay. As a result, the reservoir works with original brackets, the washer pump wiring harness, and fluid hoses, which minimizes the need for modifications during installation.

Such a solution is particularly beneficial for post-accident repairs, replacing a damaged reservoir after cracking, or during long-term operation in winter conditions, where frequent freezing of the fluid could have led to housing damage.

Characteristics of the used component

The presented reservoir is a used part sourced from dismantling, which allows for maintaining factory mounting parameters while reducing repair costs. Such components are frequently chosen by users who want to maintain the original vehicle specification while looking for a reasonable compromise between price and functionality.

In the case of washer fluid reservoirs, it is crucial to maintain the integrity of the body and the correct geometry of the mounts – using an original component from dismantling helps preserve these parameters and facilitates installation without additional adaptations.

Installation and service application

Due to its factory origin, the reservoir is prepared for installation in the location intended by the vehicle manufacturer. In practice, this means:

• compatibility with original brackets and mounting points in the body,
• adaptation for use with factory pumps and fluid level sensors,
• easier routing of washer fluid hoses,
• no need for interference with the body structure.

For workshops and individual users, this means shorter installation time and a lower risk of operational problems after replacement.

Related Mercedes washer system components

If you are planning a comprehensive repair or upgrade of the area responsible for windshield cleaning in your Mercedes and need other components from the same group, such as wiper arms, washer nozzles, or mounting elements, check out the available parts in the Other Mercedes wiper parts category.

Drivetrain safety and used parts

When selecting components from dismantling – especially in the area of the drivetrain, axles, and differentials – it is worth following proven technical condition assessment procedures. To better understand how to safely purchase used components and what to look for during their installation, read the guide: Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.

Summary

Mercedes-Benz E S211 W211 Windscreen Washer Bottle Tank Reservoir is a practical solution for drivers and workshops that want to restore full functionality to the washer system while maintaining factory fitment. The original design, mounting compatibility, and suitability for post-accident repairs make it a functional choice when servicing the wiper system in these Mercedes models.