Key trick against thieves: This is how drivers can additionally secure their vehicle. The car recognizes the key when the driver is in the immediate vicinity of the vehicle and unlocks the door.
In Mercedes, for example, it is enough to press the close button on the key twice in a row, i.e. with a “double click,” to deactivate the keyless system. In some cars, the Keyless Go system can be switched off simply using the vehicle key.