Washer Mercedes W177 Hatchback Rear Window Washer Nozzle Jet A2478601400

The Mercedes W177 Rear Windshield Washer Nozzle is an original component of the washer system, designed for precise delivery of fluid to the rear windshield. Thanks to its factory design from the Washer Fluid Tanks, Pumps, and Nozzles group, it ensures the correct spray angle, stable operation, and predictable performance in all weather conditions. This is a practical solution for users who expect reliable rear washer operation without compromising on fit.

Specifications and technical data

• SKU: A2478601400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2478601400
• Substitutable numbers: A2478601400, A 247 860 14 00
• Location on the vehicle: Rear
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and Function in the Washer System

The presented nozzle is a dedicated component for installation on the rear windshield of Mercedes W177 class vehicles. It is responsible for directing a stream of fluid onto the windshield, enabling efficient wiper operation and maintaining adequate visibility. A properly functioning rear nozzle reduces fluid consumption and improves driving comfort in rain, snow, and road dirt.

Construction and Vehicle Fitment

The nozzle belongs to the Washer Fluid Tanks, Pumps, and Nozzles group, meaning it is designed as an integral part of the complete windshield washing system. The design intended for rear vehicle installation ensures:

• stable mounting in the body or wiper arm,
• proper guidance of the fluid stream onto the windshield surface,
• compatibility with the factory fluid supply line.

Thanks to the use of original nozzle geometry, compliance with factory spray angle settings is maintained, resulting in even windshield coverage and reduced overspray outside the wiper's operating area.

Benefits of Using an Original Rear Windshield Washer Nozzle

Using a dedicated rear windshield washer nozzle in a Mercedes W177 allows for the washer system's operating parameters to be maintained in accordance with the manufacturer's specifications. Key benefits include:

• reliable fit to the mounting location without the need for modifications,
• maintenance of the factory fluid spray pattern,
• reduced risk of leaks and system performance degradation,
• consistency with other system components, such as the pump and fluid tank.

Choosing an original component is particularly important in vehicles equipped with advanced safety systems, where a clean rear windshield supports the proper functioning of sensors and reversing cameras.

Item Condition and Installation Aspects

The offered nozzle is a used part, allowing for an economical replacement while maintaining the factory design. Installation is standard – after removing the worn nozzle, the new component is seated in its designated place and connected to the existing fluid system. In most cases, no additional modifications are required, provided the vehicle is compatible with the W177 platform and the manufacturer's intended washer system.

Part Selection by Numbers and Technical Support

When selecting components such as washer nozzles, pumps, or fluid tanks, it is advisable to use manufacturer markings and catalog data to avoid compatibility issues. Comparing part numbers, interchange numbers, and data from the vehicle's service documentation is particularly helpful. For users who wish to deepen their knowledge on identifying components by numbers and principles of part selection in other vehicle systems, the article: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, which discusses practical methods for working with OEM and VIN numbers, will be useful.

If you are planning comprehensive maintenance of the windshield washing system in your Mercedes and are considering replacing other components such as pumps or fluid tanks, check the available parts in the Mercedes Washer Fluid Tanks, Pumps, and Nozzles category.