Mercedes W166 Brake Pedal Automatic Control Assembly A1662900301

Mercedes W166 Brake Pedal Automatic Control Assembly is an original brake control system component designed for vehicles with an automatic transmission. Thanks to its factory design, it ensures proper operating geometry, predictable brake feel, and consistency with other system components. This is a practical solution for users who want to restore full braking functionality while maintaining the Mercedes manufacturer standard.

Specifications and technical data

• SKU: A1662900301
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1662900301
• Substitutable numbers: A1662900301, A 166 290 03 01
• Gearbox type: Automatic
• Category: Pedal Assemblies, Pads & Parts

Purpose and function in the vehicle

Mercedes W166 Brake Pedal Automatic Control Assembly acts as the main element controlling pressure in the braking system by effectively transferring force from the driver's foot. The construction is adapted to vehicles equipped with an automatic transmission, which means an optimized pedal shape and travel for a typical two-pedal configuration (gas–brake). A properly selected lever and pivot point allow for repeatable, stable braking force modulation in daily use.

Construction and fitment to the braking system

The element belongs to the Pedals, pedal pads and footrests group, meaning it was designed with ergonomic contact with the driver and correct connection to the brake mechanism in mind. The geometry of the pedal arm, the method of mounting to the body, and the interface with the braking system are consistent with the solutions used at the factory in the W166 series, which facilitates installation and reduces the risk of incorrect positioning. Using an original component allows for maintaining the proper pedal position relative to the seat and steering wheel, which is important for comfort and driving safety.

Compatibility with automatic transmission

The pedal has been prepared for use with an automatic transmission, which is why its operating characteristics are adapted to typical usage conditions in such a drivetrain. Pedal travel, resistance, and force transfer are optimized for smooth braking in city traffic, maneuvering, and highway driving, where a predictable vehicle response to small pressure changes is important. Thanks to this, the driver receives a consistent brake feel, in line with the factory assumptions of the Mercedes brand.

Use of a used part

The offered item is a used part, which represents a reasonable compromise between repair costs and maintaining the manufacturer's original design. In the case of components such as the brake pedal, it is crucial to maintain correct geometry, rigidity, and compatibility with body mounts – these features are preserved by using a factory solution. Choosing an original, used pedal allows you to avoid problems typical of replacements with imprecise fitment, while simultaneously reducing the cost of the entire service operation.

Support with selection and system expansion

If you are planning a comprehensive repair or upgrade of the brake control zone in your Mercedes and need other elements from the same group, such as additional pedals, pads, or footrests, check out the available parts in the Pedals, pedal pads and footrests Mercedes category.

For users interested in a broader context of using original components in premium class vehicles, it is worth reading the analysis of the parts market in the article Crisis in the new parts market? Why in 2026 used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend, which discusses the advantages of making an informed choice of used OEM elements in modern cars.