I did some research this morning and discovered that the switch controls the power to an aftermarker ultrasonic back-up system. Napoer Car Parking Sensors Reverse Radar System


The car does seem to have bad blind spots and I guess a previous owner decided to give himself some help backing up. I will test the system today and see if it works very well.


The car is so pretty that I find it difficult to believe that someone would drill holes in the rear bumper to mount the sensors. On second look, they did not even space them perfectly. Still a beautiful car though.


I will have to post some better pictures. The ones shown are from the dealer ad and are very low resolution.