It's not as simple as just swapping out the switch. You will probably need a new light control module in addition to the aforementioned ambient light sensor. Too much trouble for a not so functional feature, if you asked me. I have the auto light switch, but I never use that feature. I always use it in manual mode. I don't want to keep buy new ballasts or HID bulbs every few years due to the constant switching ON/OFF going into/out of garages, tunnels, etc...