Mercedes W204 W205 W212 W221 Washer Reservoir Fluid Level Sensor A2218209110

The Mercedes W204 W205 W212 W221 Washer Reservoir Fluid Level Sensor is an original component of the washer system, designed for precise control of fluid levels in cars of this series. Thanks to its factory-matched fit to the Mercedes electrical system, it ensures stable integration with the vehicle's electronics and reliable low fluid level signaling on the instrument cluster. This is a practical service solution for users who want to restore the proper functioning of the washer system without compromising compatibility.

Specifications and technical data

• SKU: A2218209110-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218209110
• Substitutable numbers: A2218209110, A 221 820 91 10
• Category: Additional Wiper & Washer Components

Purpose and Function in the Washer System

The Mercedes W204 W205 W212 W221 Washer Reservoir Fluid Level Sensor is responsible for monitoring the fluid level in the washer reservoir and transmitting this information to the vehicle's control system. A properly functioning sensor allows the driver to continuously monitor the fluid status, which is important for driving safety, especially in adverse weather conditions.

This component works with the factory washer reservoir and the wiring harness in Mercedes C-Class, E-Class, and S-Class models from the W204, W205, W212, and W221 series, ensuring:

• stable fluid level readings,
• correct display of warning messages,
• maintenance of full washer system functionality.

Benefits of Using an Original Sensor

Using an original washer reservoir fluid level sensor in a Mercedes offers tangible operational benefits. The component is structurally matched to the reservoir socket and the electrical system's parameters, which reduces the risk of leaks and reading errors. This ensures stable operation of the washer system, and the dashboard messages remain consistent with the actual fluid level.

Choosing a used, original component allows for a reasonable repair cost while maintaining the system's factory operating characteristics. This is particularly important in premium vehicles, where part compatibility with electronic systems is crucial for trouble-free operation.

Condition, Verification, and Service Application

The offered sensor comes from the Other Wiper Parts category, reflecting its connection to the washer and wiper system in Mercedes vehicles. As a used part, it is a practical solution for routine repairs when the existing sensor causes incorrect messages or intermittent system operation. Replacing it with a tested component restores proper system function without the need to modify the vehicle's electrical system.

Before installation, pay attention to:

• the cleanliness of the washer reservoir socket,
• the condition of the seal at the sensor mounting point,
• the correct connection of the electrical harness plug.

Support for Selection and System Expansion

If you are planning a comprehensive repair or upgrade of the washer and wiper system area in your Mercedes and need other parts from the same group, such as additional sensors, mounting elements, or service accessories, check the available parts in the Other Mercedes Wiper Parts category.

For owners of models from years close to W204, W205, W212, and W221, who want to consciously utilize the potential of used components when refreshing their cars, the guide: Second Life for Youngtimers – How Used Car Parts Revitalize Cars from 1998–2012 will be useful.

If you are considering a strategy of combining original parts, aftermarket parts, and used components in your service plan, a practical cost-technical guide may also be helpful: Original, Aftermarket, or Used – Which Car Parts Are Most Cost-Effective?.