Mercedes ML W164 W221 Fuel Flap Release Actuator Motor A2518200197

Mercedes ML W164 W221 Fuel Flap Release Actuator Motor is an original component from the Fuel filler flaps and accessories group, designed to control the fuel flap locking mechanism in Mercedes vehicles. It ensures reliable locking and unlocking of the flap, which translates into safe operation of the refueling system and convenience in daily vehicle use.

Specifications and technical data

• SKU: A2518200197-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2518200197
• Substitutable numbers: A2518200197, A 251 820 01 97
• Category: Fuel Flaps & Components

Purpose and function of the actuator

The fuel flap release actuator is responsible for mechanically locking and releasing the flap when the vehicle's central locking system is engaged or disengaged. In Mercedes SUV and luxury sedan models, this solution is integrated with the comfort system, which is why a functional actuator is important for:

• maintaining the seal of the fuel filler area,
• protecting against unauthorized access to the fuel filler,
• proper cooperation with the central locking system and body electronics.

Thanks to the use of an original design, the actuator operates with properly calibrated force and travel, which reduces the risk of the flap jamming and excessive load on the mechanism.

Construction and advantages of the original solution

The offered actuator is a component designed specifically for the fuel flap locking system in Mercedes vehicles, which means it is perfectly matched in terms of mounting geometry, cable length, and operating characteristics. In practice, this translates into:

• stable operation across the full range of operating temperatures,
• proper cooperation with the factory central locking system,
• reduction of vibration and noise during mechanism operation.

Using an original actuator allows you to avoid problems typical of aftermarket replacements, such as imprecise fitment or the need for installation modifications.

Component condition and installation aspects

The product comes from disassembly and is offered as a used original component, which provides a favorable compromise between cost and maintaining factory specifications. This type of part is particularly attractive for maintenance repairs when you want to maintain compatibility with the factory comfort system.

The actuator is intended for installation in the factory location, using original mounting points and the standard wiring harness. In most cases, the replacement involves:

• accessing the space behind the fuel filler flap or the trunk cavity,
• disconnecting the electrical connector and the cable element,
• replacing the old actuator with a functional unit while maintaining the factory mounting position.

Why it is worth using this actuator in your Mercedes

Using an original fuel flap release actuator allows you to restore the proper operation of the locking system without interfering with the electrical installation or body mechanics. This solution is especially recommended when:

• the fuel filler flap does not lock or remains permanently closed,
• errors related to the central locking system appear in the fuel filler area,
• replacement of the component is necessary due to mechanical damage or corrosion.

By choosing this component, you maintain the consistency of the comfort system and preserve the operating parameters intended by the vehicle manufacturer, which is important for both durability and future diagnostics.

Related components and technical knowledge

If you are planning a comprehensive repair or upgrade of the fuel filler area in your Mercedes and need other components from the same group, such as flaps, hinges, or seals, check the available parts in the Mercedes Fuel filler flaps and accessories category.

For a better understanding of how the entire vehicle fuel system works and the dependencies between the fuel filler, tank, and equipment, it is worth checking out our guide: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. This will allow you to better plan diagnostics and any further service work.