I've seen several references on the forum about the Carista OBDII device and I am considering purchasing one to turn the reversing beeps off myself. I always seem to have problems with my Toyota Hybrids getting the main dealers to turn them off for me. One wanting £80 when I purchased my Gen 3 Prius. I did ask for them to be turned off when I purchased my Gen 4, but they forgot. Anyways, it looks like this could be a good investment for all my family run Hybrids (both kids have Auris Hybrid