Anyone aware if the volume of the back-up sensor beep can be made louder? I've not found any adjustment but thought perhaps it was something that could be done at the dealer. Even with the stereo off, I just find it way too soft, but with the stereo on... NO WAY. I'm spoiled by the MINI sensor, which could be heard loud and clear even over the stereo. Seems a bit silly to include such a useful safety item and then hamstring it with that puny beep.