My brand new 300C (1,100 miles) right now has the same problem. I had a 300 Limited and I recently traded it in on a 300C. The Limited didn't have the problem, so my question is, is it the 300C's only. And actually as of yesterday it stopped. Well this is something that needs to be seriously addressed. Oh yeah I was thinking about purchasing the Maybach, so I'll let you know about the brake light when I do lol...