So Carpuride have restored the toggle for day/night mode on the W702. It was there originally and when they updated the unit to give you the option of not having the audio going through their unit they removed it to just a brightness slider. I've been having some issues (again) with my replacement unit so they sent me the latest firmware which has restored this toggle. I'd prefer it to auto dim but it doesn't have a sensor so this is at least a quick toggle to do that.