Gilly, you seem to be "the man" here and this is my first post so please help. I've done the search and found no reference to this light. My wife has a 2001 ML320 Sport and it has been flawless so far. Last week when she started it, a yellow lamp or LED illuminated on the speedo. It's between the "MPH" and the "140" on the speedo and there is no text around it anywhere. I've read the manual 3 times and can't find anything that says what this means. What the heck is it and do we need to take it in to the dealer? It went back out the next time she started it.