In the last 6 months that I have had the car, parking has worked me for only twice for perpendicular parking, and it has parked perfectly between 2 cars. Never worked for parallel parking. I prefer to park on my own as it is much faster, but the few times that I have tried to "show off" the feature to family and friends, the "P" sign has always failed to show up on the screen, in spite of multiple attempts with speed, position, D or R. and trying to park between 2 parked cars where there is a full parking spot available.
The times the parking P sign has showed up without me trying is at traffic signals when there are parked cars near the curb, and a few times when parking the car in my garage. It is probably picking up my other car parked inside, but again this happens only sometimes not every time. Theoretically, this should have happened all the time.
Called Tesla Support about this issue. They checked all the sensors and said that they were working fine. Suggested I re-boot the system and try again, and to call back if the issue persists. I did that and the issue is still there, but getting to Tesla Support is a big challenge, so I have given up, because I dont want to be on hold for a minimum of 30 minutes for a feature that I do not use.