Mercedes-Benz CLK C208 W208 Petrol Fuel Expansion Tank Supply A2084700689

The Mercedes-Benz CLK C208 W208 Petrol Fuel Expansion Tank Supply for Mercedes-Benz CLK C208 / W208 models is an original fuel system component designed for use with petrol engines. This used part from the Fuel tanks and filler pipes category allows for a technically correct repair or completion of the system, maintaining factory performance characteristics and operational safety.

Specifications and technical data

• SKU: A2084700689
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2084700689
• Substitutable numbers: A2084700689, A 208 470 06 89, KZ
• Fuel type: Petrol
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The presented expansion tank is responsible for the controlled accumulation and compensation of fuel volume in the petrol system, which reduces the risk of air entering the lines and unstable engine operation. The component works with the main fuel tank, lines, and system accessories, stabilizing the flow and helping to maintain correct supply parameters.

Thanks to its design adapted to the specifics of the CLK C208 / W208 body, the tank ensures proper fuel routing under various driving conditions – from daily city use to longer trips, where the repeatability and predictability of the powertrain's operation are important.

Compatibility with petrol engines

The component has been developed for use with a petrol-type fuel system, which means the materials and geometry are properly matched to the properties of the fuel and the operating pressures in such installations. Using a dedicated expansion tank reduces the risk of leaks, improper venting, or uncontrolled pressure changes in the lines.

Choosing an original solution for a Mercedes allows you to maintain the consistency of the entire fuel system, which is important for both engine refinement and the durability of other components – pumps, lines, or filters.

Installation and operational characteristics

The used fuel expansion tank for the CLK C208 / W208 is structurally prepared for installation at factory mounting points, which facilitates the mechanic's work and reduces service time. Maintaining the original connection geometry allows for the correct connection of existing fuel lines without the need for system modifications.

The main advantages of using an original tank in this model include:

• consistency with the factory fuel routing system in the CLK C208 / W208 body,
• appropriately selected working capacity in the context of petrol engine characteristics,
• preservation of the manufacturer's intended mounting points and line routing,
• possibility of servicing the fuel system without interfering with the body structure.

Professional selection by part numbers and brand

Selecting this component for a specific vehicle should be based on Mercedes identification data and part numbers, which minimizes the risk of errors when ordering. Original markings allow for verification of compatibility with a specific body version and fuel system configuration, and also facilitate comparison with other tank variants used in the model family.

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

Technical support and knowledge about the fuel system

To better understand the role of the expansion tank in the entire supply system, it is worth referring to specialized materials regarding diagnostics and operation. A detailed discussion of the operation of injectors, pumps, and fuel tanks, along with practical tips on selecting parts by number and regeneration, can be found in the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration".

Summary

The original Mercedes-Benz CLK C208 W208 Petrol Fuel Expansion Tank Supply for the Mercedes CLK C208 / W208 is a technically matched component from the Fuel tanks and filler pipes group, intended for stabilizing the operation of the petrol supply system. This used part allows for professional repair without interfering with the vehicle's structure, maintaining factory fuel flow parameters and supporting trouble-free vehicle operation.