
One of the vehicle's remote keys must be within range behind the vehicle, approx. 1 meter (3 feet), for opening and closing to be possible. This applies even if the vehicle is unlocked in order to prevent the trunk lid from inadvertently opening e.g. at a car wash.
Foot movement operation

If several opening or closing attempts have been made without the remote key in range behind the vehicle, foot movement operation will not be available for a short period of time.
Do not keep your foot under the vehicle in a kicking motion. This may prevent activation.
Interrupting foot movement operation
The remote key does not need to be within range of the vehicle to interrupt closing.