Mercedes W470 Washer Bottle Reservoir Filler Neck Pipe Cap A4708604100

Mercedes W470 Washer Bottle Reservoir Filler Neck Pipe Cap is an original washer system component designed for direct connection to the factory reservoir in W470 series models. Thanks to its precise geometry and factory design, it ensures secure mounting, convenient fluid refilling, and proper routing of the filler pipe. This used OEM component is a sensible choice for washer system maintenance when you want to preserve factory design standards.

Specifications and technical data

• SKU: A4708604100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4708604100
• Substitutable numbers: A4708604100, A 470 860 41 00
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and function in the washer system

The washer reservoir filler neck in the Mercedes W470 is responsible for the safe and leak-free delivery of fluid from the filler cap to the actual reservoir. This component works with the factory reservoir, pump, and nozzles, creating a cohesive supply system for the windshield and, depending on the vehicle configuration, other windows or headlights.

A properly selected, original filler neck minimizes the risk of leaks, overflows, and system venting issues. This is particularly important in vehicles operated in harsh conditions, where the washer system is used intensively and exposed to temperature fluctuations and contamination.

Construction and fitment for Mercedes W470

Mercedes W470 Washer Bottle Reservoir Filler Neck Pipe Cap has been designed for the specific engine bay architecture of this model. This ensures proper routing of the filler pipe, correct length and shape, as well as compatible mounting points relative to the body and reservoir. As a result, installation is predictable, without the need for modifications or fitting universal replacements.

The factory design ensures:

• stable seating in the engine bay,
• proper sealing at the connection point with the reservoir,
• easy access to the filler cap during service or fluid refilling,
• compatibility with the original wiring and cover routing system.

Benefits of using an original used component

Choosing a used, original washer reservoir filler neck is a solution that allows you to maintain factory fitment and proper cooperation with other system components, while optimizing repair costs. Unlike many universal replacements, the OEM component is designed specifically for the given model, which reduces the risk of installation issues and leaks.

In practice, this translates into:

• stable operation of the washer system in various weather conditions,
• lower risk of damage resulting from stress or improper pipe routing,
• easier diagnostics of potential faults, thanks to maintaining the original configuration.

Application in service and diagnostics

During washer system repairs in a Mercedes W470, the reservoir filler neck is often replaced after mechanical damage (e.g., cracks, deformations) or engine bay interventions. Using the correct OEM component facilitates service work, as the mechanic is assured of compliance with factory technical documentation and assembly diagrams.

In the case of comprehensive vehicle maintenance, it is worth remembering that the washer system interacts with other vehicle components, much like the fuel system with injectors, pumps, and the tank. For a better understanding of the principles of selecting parts by factory numbers and diagnostic methods, the following article may be useful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses a practical approach to working with supply systems in vehicles.

Expanding Mercedes washer system service

If you are planning a comprehensive repair or upgrade of the area responsible for window cleanliness in your Mercedes and need other elements from the same group, such as reservoirs, pumps, or washer nozzles, check the available parts in the category Mercedes washer reservoirs, pumps, and nozzles.

Summary

Mercedes W470 Washer Bottle Reservoir Filler Neck Pipe Cap is a practical choice when repairing or restoring the factory washer system in this model. The original design ensures proper fitment, predictable installation, and compatibility with other system components. For users and service centers, this means efficiently restoring full washer functionality while maintaining manufacturer standards.