Are these known to get touchy like the ride selector switch? Mine does not light up when switched to "premium" Also, I'm assuming it defaults to regular, instead of premium if the switch is inop?
Yep, spray a bit of contact cleaner inside it and switch it on-off a couple dozen times... Not sure but I'm guessing the relay could give a problem, it's the blue one in the lower part of the dash, just to the passenger side of the console...