Mercedes-Benz S-Class Foot Motion Retrofit Review

Mercedes-Benz S-Class W223: Adding Foot Motion for Enhanced Convenience

Many owners of the luxurious Mercedes-Benz S-Class W223 find themselves wishing for a specific convenience feature: the ability to open the trunk hands-free using a foot-activated motion sensor. While the S-Class comes equipped with a power trunk, the foot motion (or kick sensor) functionality is often omitted, particularly in lower trims or certain model years. This missing option, known as 'Foot Motion,' is a highly sought-after upgrade, with many owners opting for aftermarket installation to enhance their driving experience. The convenience of opening the trunk with a simple kick, especially when your hands are full or you're bundled up in cold weather, significantly elevates the premium feel of the S-Class.

How Foot Motion Works and Installation Process

Operating the foot motion system is remarkably intuitive. A sensor is typically located on the underside of the rear bumper. By performing a swift kicking motion – inserting your foot under the bumper and quickly retracting it – the system detects the movement and automatically opens or closes the trunk. This eliminates the need to place bags down or fumble for keys.

Installation Process:

1. Sensor Placement and Integration: Technicians precisely locate the optimal position for the foot sensor module under the rear bumper.
2. Wiring and Module Installation: The new sensor is wired into the vehicle's existing electrical system and integrated with the power trunk module. This often involves accessing the vehicle's network to ensure proper communication.
3. System Coding and Testing: Diagnostic tools are used to code the new module into the S-Class's computer system. Thorough testing is performed to confirm the hands-free trunk operation functions correctly in all conditions.

The entire installation process typically takes around 2 to 3 hours and can usually be completed within a single day. While it involves intricate electronic work, experienced technicians can perform this upgrade efficiently.

Cost and Considerations for Foot Motion Retrofit

The cost for retrofitting the foot motion option on a Mercedes-Benz S-Class W223 can vary depending on the region and the specific workshop, but generally falls within the range of approximately 1,500,000 to 2,500,000 Korean Won (KRW). This price reflects not just the cost of the components but also the labor involved in integrating the system with the car's complex electronics. Factors influencing the final price include the quality of the aftermarket module used and the complexity of the vehicle's network integration, which can be more challenging on newer S-Class models.

Proper maintenance of the foot motion system involves keeping the sensor area clean. Dust, dirt, or snow buildup can interfere with the sensor's ability to detect the kicking motion accurately. Regular cleaning of the underside of the bumper ensures reliable operation.