Just thought I'd throw my $0.02 in... Mine also sucks at dimming. If cars are within about 10 car lengths, it usually won't dim. If there are street lights, it seems to not wawnt to dim. A couple nights ago, it wouldn't dim for anything. Today, a truck with brights was blinding me at dusk and it wouldn't dim. I do prefer to have the switch and manually change it... like a sucker. I'm taking it in next week to have them look at it.