I noticed that my 2020 i3 Rex has a button for parking distance sensors. But the manual that I have indicated that parking assistance is available if there are sensors close to where the front flanges are. My i3s does not have the necessary sensors so I assumed this option is not available on an i3s. However when I do to the BMW Canada sites, I didn't see any of the models had this feature available (i3, i3 rex, i3s, i3s rex). IS this true and when did this stop and why?