Mercedes Vito Viano W639 Throttle Accelerator Pedal Unit Assembly A6393000704

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes Vito Viano W639 Throttle Accelerator Pedal Unit Assembly is a component from the Pedals, pedal pads and footrests group, responsible for precisely transmitting the accelerator pedal position signal to the engine control system. This used, original Mercedes component allows you to maintain the factory throttle response characteristics and stable drivetrain operation in Vito and Viano W639 generation models.

Specifications and technical data

• SKU: A6393000704
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6393000704
• Substitutable numbers: A6393000704, A 639 300 07 04, 0281002563, 0 281 002 563
• Category: Pedal Assemblies, Pads & Parts

Function and role of the accelerator pedal potentiometer

The accelerator pedal potentiometer in the Mercedes Vito and Viano W639 plays a key role in electronic throttle control, replacing the traditional throttle cable. The change in pedal position is processed into an electrical signal that is sent to the engine control unit, which enables smooth torque delivery and stable operation of the powertrain under various load conditions.

A fully functional accelerator pedal potentiometer contributes to:

• smooth acceleration without jerking,
• correct engine response to pedal input,
• maintaining proper operating parameters of the fuel injection system,
• reducing the risk of the engine entering limp mode.

Construction and fitment for Mercedes Vito / Viano W639

The offered accelerator pedal potentiometer is structurally matched to the interior architecture and control system of the Vito and Viano W639 models. Using an original solution from the Pedals, pedal pads and footrests group ensures proper positioning relative to the floor, an ergonomic operating angle for the driver's foot, and compatibility with factory mounting points.

The component is ready for installation in place of the factory pedal, which facilitates service and reduces the time required for replacement. Maintaining the original geometry and signal characteristics helps avoid adaptation issues within the engine control unit.

Benefits of using an original Mercedes component

Using an original Mercedes accelerator pedal potentiometer in a Vito or Viano W639 is a solution that helps maintain the integrity of the entire powertrain. The component is designed to work with a specific vehicle platform, ensuring that:

• predictable throttle response is maintained, consistent with factory settings,
• the risk of communication errors with vehicle electronics is minimized,
• compatibility with safety systems dependent on the accelerator pedal position is maintained.

For users who want to manage their service budget wisely, a used original component represents a reasonable compromise between cost, quality, and fitment.

Driver's zone and user comfort

A functional accelerator pedal potentiometer affects not only engine performance but also driving comfort. Stable pedal resistance, repeatable characteristics, and proper positioning relative to other elements in the driver's zone facilitate precise acceleration control, which is important both in city driving and on long journeys.

If you want to better understand how the selection of used equipment elements affects the perceived comfort inside the car, it is worth reading our guide: premium interior for half the price – second-hand seats, steering wheels, and multimedia.

Further upgrades within the pedal system

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

Summary

Mercedes Vito Viano W639 Throttle Accelerator Pedal Unit Assembly is a technically matched drivetrain control element designed for this generation of vehicles. Choosing an original Mercedes component allows you to maintain electronic consistency, predictable throttle response, and user comfort, which directly translates to the safety and refinement of the entire vehicle.