Over the past year I've been upgrading and fixing anything and everything on my 190. On day my interior button lights just stopped working. My instrument cluster lights up just fine, along with all the warning lights and my dome lights. It's just all the switches that use to be lit up, now don't. So my AC controls and window switches aren't lit up any more. I'm about to go on a 3,000 mile drive in two days and was wondering if it would be a simple fix I can do before I leave. Any help would be much appeciated!