Somewhat off topic but definitely some helpful info! I too love this option and was considering it. I told my service advisor my gear knob was looking a little worm around the emblem and I was thinking about replacing it with the illuminated ///M5 knob. He said," Don't buy a new one, pre-mature wear is under warranty, I'll order you a new stock one on Monday." so believe it or not, our knobs are under warranty.
