Mercedes ML W164 OM629 OM642 Diesel Fuel Tank Filler Neck Pipe A1644700220

Mercedes ML W164 OM629 OM642 Diesel Fuel Tank Filler Neck Pipe is an original fuel system component designed for diesel engines in this popular SUV series. As part of the Lines, hoses and pipes group, it is responsible for the safe and stable routing of fuel from the filler to the tank, which directly impacts operational reliability. Using this used OEM component allows you to maintain the factory fuel routing geometry and compatibility with factory body mounts.

Specifications and technical data

• SKU: A1644700220
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644700220
• Substitutable numbers: A1644700220, A 164 470 02 20
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel filler neck pipe in the version dedicated to OM629 and OM642 diesel units is responsible for the tight, directional delivery of diesel fuel to the tank. The design, tailored to the ML W164 body, minimizes the risk of stress, abrasion, and leaks, which is particularly important in vehicles used in varied road conditions. Using the correct component for a Diesel engine reduces the risk of venting issues and improper tank filling.

Benefits of using the original fuel filler neck pipe

Choosing the original fuel filler neck pipe for the Mercedes ML W164 ensures:

• factory fitment to the body and mounting points,
• correct routing of the pipe relative to the chassis and protective elements,
• maintenance of the fuel flow diameter designed by the manufacturer,
• reduction of the risk of leaks and air entering the system during refueling.

As a result, the fuel system maintains stable operating parameters, and maintenance remains predictable and consistent with the manufacturer's technical documentation. The used OEM component is also an attractive cost-effective solution while maintaining high build quality.

Condition of the component and assembly aspects

The fuel filler neck pipe is offered as a used part, which in practice means retaining the original construction and material at a more favorable repair budget. Installation involves removing the old pipe, transferring the mounts, and connecting it to the existing tank and fuel filler system, while maintaining the factory routing. Proper positioning of the pipe relative to the wheel arches and underbody covers reduces the risk of mechanical damage during operation.

Service application and cost optimization

In vehicles with diesel engines, such as the ML W164 with OM629 and OM642 units, a correctly selected fuel filler neck pipe is important for both safety and daily comfort (no refueling problems, no fuel odor around the vehicle). Using a used OEM component allows you to reduce vehicle downtime in the workshop and limit repair costs compared to new replacements with uncertain geometry. If you want to better understand how the availability of used original parts affects service time and repair budgets, it is worth reading the article Availability of car parts off the shelf vs. repair time – how used OEM parts shorten workshop stays?.

Complementary Mercedes fuel system components

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other components from the same group, such as additional lines, flexible hoses, or rigid fuel pipes, check out the available parts in the Mercedes lines, hoses and pipes category.