Mercedes ML W164 R W251 Fuel Filler Tank Cover Cap Diesel Red A1644700130

Mercedes ML W164 R W251 Fuel Filler Tank Cover Cap Diesel Red is an original component from the Fuel filler flaps and caps group, designed for diesel fuel systems. The red finish facilitates quick identification of the cap at the vehicle, and the factory design ensures proper sealing of the filler neck and stable mounting in the bodywork.

Specifications and technical data

• SKU: A1644700130
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644700130
• Substitutable numbers: A1644700130, A 164 470 01 30
• Location on the vehicle: Front, Left
• Fuel type: Diesel
• Color: Red
• Category: Fuel Tank Caps

Purpose and technical function

The presented cap is a fuel system component designed for vehicles with a diesel engine, where maintaining proper filler tightness is crucial. The use of a dedicated solution for diesel fuel reduces the risk of contaminants entering the tank and helps maintain stable operating conditions for the fuel system.

Its location in the front left part of the vehicle requires the cap geometry to be properly matched to the flap and the socket in the bodywork, which is why using an original solution is important both in terms of installation and subsequent operation.

Color scheme and ergonomics of use

The red color of the cap serves both an aesthetic and practical function – it facilitates quick location of the filler and minimizes the risk of mistakes when refueling in low-light conditions. This makes vehicle operation more intuitive, and the driver has a clear point of reference when opening the flap and tightening the cap.

The properly profiled working surface ensures a secure grip, which translates into comfortable tightening and loosening even when wearing work gloves or in lower ambient temperatures. This is a practical solution for users who frequently use the vehicle in workshop or fleet conditions.

Benefits of using an original fuel filler cap

• Stable filler sealing – limiting the ingress of moisture and contaminants into the fuel system.
• Fitment to the specific body zone on the left side, which facilitates installation and preserves the factory body line.
• Clear visual marking thanks to the red color, supporting safe filler operation.
• A solution designed for diesel-powered vehicles, which promotes proper fuel system operation.

Application in Mercedes vehicles and part selection

The cap was developed for Mercedes ML, GL, and R series models, which translates into proper fitment with the factory flap and filler socket. Using an original solution allows for maintaining structural consistency of the bodywork and correct interaction with surrounding elements in the filler zone.

To select the cap precisely for a specific vehicle version, it is worth using the manufacturer's markings and vehicle data, which minimizes the risk of mismatch and speeds up the service process.

Condition of the item and cost-effectiveness

The offered cap comes from the used parts segment, which allows for a significant reduction in repair costs compared to new components, while maintaining factory design and compatibility with the vehicle. This is a sensible solution for users who want to restore full functionality of the fuel filler without overstretching the service budget.

More practical tips on making informed choices regarding secondary market items can be found in the article on saving on car service using used parts, where, among other things, the benefits of purchasing original dismantled components are discussed.

Technical support and additional materials

In the case of elements related to the fuel supply system, proper use and regular inspection of component condition are particularly important. For users interested in a broader context of fuel system operation, diagnostics, and part selection based on manufacturer markings, the guide on the construction, maintenance, and regeneration of the fuel system, covering, among others, injectors, pumps, and the fuel tank, will be helpful.

If you are planning a comprehensive repair or upgrade of the fuel filler zone in your Mercedes and need other elements from the same group, such as additional caps, flaps, or filler covers, check the available parts in the Mercedes fuel filler flaps and caps category.