Mercedes W164 Rear Window Glass Washer Spray Jet Nozzle A1648600447

Mercedes W164 Rear Window Glass Washer Spray Jet Nozzle is a precision component of the windshield washing system, designed specifically for the rear window of vehicles in this series. It is responsible for evenly distributing fluid across the glass surface, which improves visibility and driving safety in rain, snow, and while driving on dirty roads. As part of the Washer fluid reservoirs, pumps and nozzles group, it is an important addition to a complete, functional washer system.

Specifications and technical data

• SKU: A1648600447
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1648600447
• Substitutable numbers: A1648600447, A 164 860 04 47
• Location on the vehicle: Rear
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and function in the washer system

The presented nozzle is designed for installation in the rear part of the vehicle, in the area of the tailgate window. Its task is to direct the fluid stream so that it effectively works with the wiper, ensuring the clearest possible field of vision. The properly selected geometry of the spray holes allows for a stable, predictable distribution of fluid, which reduces consumption and improves user comfort.

This element is part of the original Mercedes washer system, thanks to which it maintains the factory operating parameters of the system – from the spray characteristics and seal integrity to compatibility with the existing installation.

Construction and fitment for Mercedes W164

Mercedes W164 Rear Window Glass Washer Spray Jet Nozzle has been designed with proper seating in the bodywork and a secure connection to the fluid supply hose in mind. The shape of the body and the mounting points are adapted to the factory mounting holes, which facilitates replacement without the need for modifications to the bodywork or upholstery elements.

Proper fitment to the washer system translates into:

• stable mounting in the rear part of the vehicle,
• correct sealing of connections with the fluid hose,
• maintaining the correct spray angle on the glass.

Performance parameters and operation

As an element from the Washer fluid reservoirs, pumps and nozzles category, the nozzle works with the factory pump, reservoir, and fluid hoses. A properly functioning rear nozzle reduces the risk of dry spots forming on the glass, which is especially important when driving in difficult weather conditions or on dusty roads.

A properly selected rear window washer nozzle:

• ensures even coverage of the glass with fluid,
• reduces the load on the wiper,
• allows for maintaining good visibility without the need for frequent activation of the washer.

Condition and benefits of using a used part

The offered element is in used condition, which allows for an economical replacement while maintaining the manufacturer's original specifications. In the case of washer nozzles, this means the possibility of restoring the correct operation of the system without the need to invest in a new set of components. For many Mercedes W164 users, this is a reasonable compromise between cost and functionality.

The use of an original, used rear window nozzle is particularly beneficial when the existing element has become clogged, mechanically damaged, or no longer provides the correct distribution of the fluid stream.

Integration with other washer system components

A functional rear window washer system is not just the nozzle itself, but also the pump, reservoir, hoses, and seals. Replacing the nozzle is often the first step to restoring full functionality, especially when the problem is uneven spraying or restricted fluid flow. If necessary, you can also consider checking other components from the same group to ensure consistent operation of the entire system.

If you are planning a comprehensive repair or upgrade of the zone responsible for washing and spraying windows in your Mercedes and need other elements from the same group, such as additional nozzles, pumps, or fluid reservoirs, check the available parts in the Mercedes washer fluid reservoirs, pumps and nozzles category.

Part selection by numbers and technical support

When selecting washer system elements – similar to the fuel system – it is crucial to use the correct manufacturer markings and reference numbers to avoid compatibility issues. It is worth knowing the procedures for identifying parts by OEM numbers or by the vehicle's VIN, which minimizes the risk of purchasing an incompatible component.

If you want to better understand the principles of selecting elements by catalog numbers and the importance of correct diagnostics in modern vehicle systems, the following article will be helpful: Fuel system – injectors, pumps and fuel tank: maintenance and regeneration.