Mercedes-Benz C M S Class W140 W163 W202 Windscreen Washer Pump A2108690821

The Mercedes C M S W140 W163 W202 Wiper Washer Pump is an original part from the Washer Fluid Tanks, Pumps, and Nozzles group, designed for use in selected Mercedes C-Class, M-Class, S-Class models and W140, W163, and W202 series. A used pump ensures a factory fit for the washer system, facilitating installation and maintaining consistency with other components of the windshield washing system.

Specifications and technical data

• SKU: A2108690821-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2108690821
• Substitutable numbers: A2108690821, A 210 869 08 21, EM
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and Function of the Washer Pump

The presented pump is responsible for delivering fluid from the reservoir to the washer nozzles, stabilizing pressure in the system and enabling effective windshield cleaning while driving. Using an original Mercedes component ensures the correct operating characteristics of the system, including appropriate fluid flow and proper compatibility with the vehicle's electrical system.

This part is dedicated to Mercedes vehicles where the washer system was originally designed for a specific pump type. This minimizes the risk of leaks, connection issues, and improper operation under various driving conditions.

Construction and Fit for the Washer System

The washer pump is designed as a compact module mounted directly to the fluid reservoir. Appropriately shaped connection ports and the electrical connector are adapted for the factory installation in Mercedes C-Class, M-Class, S-Class models and W140, W163, and W202 series, making for easy plug-and-play replacement.

Key advantages of this solution include:

• Factory fit for the original fluid reservoir and washer hoses,
• Compatibility with the vehicle's electrical system,
• Stable operation under typical driving conditions,
• Maintenance of the original fluid spray pattern on the windshield.

Condition, Verification, and Service Application

The washer pump is offered as a used part, meaning it comes from a dismantled vehicle and may show signs of previous use, while retaining the functionality required for continued operation. This type of part is suitable for both standard replacement of a worn component and for repairing the washer system after mechanical damage or connector corrosion.

For correct selection, it is recommended to compare the washer system configuration in your vehicle with the offered pump, particularly regarding the reservoir type, port layout, and electrical connector type. Proper matching minimizes installation time and reduces the need for additional system modifications.

Practical Application and Related Parts

Replacing the washer pump is recommended in case of reduced system performance, no response when activating the washers, or leaks around the reservoir. During servicing, it is advisable to also check the condition of the hoses, nozzles, and the fluid reservoir itself to restore full functionality of the entire windshield washing system in one operation.

If you are planning a comprehensive repair or upgrade of the visibility and windshield cleaning area in your Mercedes and need other parts from the same group, such as fluid reservoirs, additional pumps, or washer nozzles, check the available parts in the Mercedes Washer Fluid Tanks, Pumps, and Nozzles category.

Technical Support and Part Selection

Selecting the correct components for fluid and power systems in modern vehicles requires consideration of specific manufacturer parameters, such as installation type, equipment configuration, and vehicle electronics compatibility. For more complex repairs, including engine power supply components, the tips in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair may be helpful, discussing diagnostic principles, selection based on manufacturer markings, and operation of components working with operational fluids.