Hi Daniel, I had 2 of your problems when i bought my rx400, the tailgate one & the stonechips ... Chipsaway got rid of the chips for £120 & did an excellent job ... the tailgate one .. i believe is because of where you are stood when you are trying to open the boot (possibly to do with the camera ?) ... anyway, mine hasn't done it once since i started opening the boot from a further distance away.