Thanks to everyone who contributed to this, I got rid of those annoying driving and backup sounds. My neighbors will be very happy, especially for that backup beeps. Mine is a 2013 S BTW.
Note that I could not figure out what these are for: "Sound A", "Sound B". I tried disabling/enabling them, and nothing changed. However, when I disabled Sound A checkbox and then reenabled it, a $100 bill appeared somewhere from below, just like K.I.T.T. did in Knight Rider. Sound B only gave $50. I guess you need to change the descriptions like $100 and $50