1.No problems. 2.It's not my Bluetooth connector, I borrowed it from my son in law who uses it on his diesel A6 Allroad, so it works on more than one vehicle. I believe he just got it of ebay, I can ask if he remembers from who, but it appears they are pretty flexible. 3.I believe the stated power figures are rear wheel figures, not flywheel figures. I just wanted to be able to compare before and after.