Mercedes CL C216 Washer Reservoir Tank Filler Neck Upper Part A2218600164

Mercedes CL C216 Washer Reservoir Tank Filler Neck Upper Part is an original washer system component designed for precise fluid delivery from the filler cap to the reservoir. Thanks to its factory-spec geometry and perfect fit for the CL C216 model, this component ensures stable mounting, convenient service access, and reliable operation of the washer system during daily driving.

Specifications and technical data

• SKU: A2218600164
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218600164
• Substitutable numbers: A2218600164, A 221 860 01 64
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and function in the washer system

The described upper filler neck is a component belonging to the Washer fluid reservoirs, pumps, and nozzles group, responsible for leak-free and ergonomic fluid refilling. A correctly selected filler neck eliminates the risk of leaks in the engine bay, facilitates service maintenance, and supports the proper operation of the entire washer system, including pumps and nozzles.

In practice, this means that after installation, the driver is provided with convenient access to the filler cap, and the hose leading to the reservoir is routed stably, without tension or unwanted kinks. This is particularly important in the CL C216 model, where the engine bay layout is compact and requires components with precisely matched geometry.

Original origin and fitment for Mercedes CL C216

The upper filler neck was designed by the vehicle manufacturer with the specific body and engine bay construction of the Mercedes CL C216 in mind. This means:

• secure fitment with factory mounting points,
• correct routing relative to covers and body components,
• maintenance of the stiffness and vibration resistance specified by the manufacturer.

As a result, installation is predictable, without the need for modifications or forcing the component into place. Its original origin also helps maintain the integrity of the entire washer system, which translates into stable long-term performance.

Performance characteristics of the used component

The component comes from an operated vehicle, which in practice means it has already been verified under real road conditions. A used filler neck, provided it maintains proper sealing and geometry, is a reasonable choice for users who want to restore full functionality to the washer system at controlled service costs.

For this type of component, it is crucial that:

• the filler hose retains the appropriate stiffness and shape,
• the mounting points allow for stable attachment to the body,
• the connection point to the reservoir and the area around the filler cap are free from mechanical damage.

Meeting these conditions allows for further, trouble-free operation of the washer system in the Mercedes CL C216 without the need to invest in a new part.

Washer system integration and diagnostics

The upper filler neck works directly with the fluid reservoir, pumps, and hoses leading to the nozzles. In case of problems with the washer system – such as a drop in fluid level without visible leaks under the vehicle, difficulties with refilling fluid, or moisture in the engine bay – it is worth including this component in your diagnostics.

For users interested in a broader approach to maintaining fuel and fluid flow systems in a car, a specialized guide on diagnostics and component selection by identification numbers may be helpful – this is discussed in detail in the post Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which organizes the approach to working with OEM numbers and service procedures.

Expanding Mercedes washer system service

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

Selecting components from the same functional group allows you to maintain the technical consistency of the system, facilitates future diagnostics, and helps maintain predictable washer performance, which directly affects visibility and driving safety in difficult weather conditions.