I have a loaner that, of course, doesn't have it's owner's manual. 5 times in the last 36 hours, two warning lights have come on repeatedly. One is the circle with the ! in it (looks like the circle has brake pads or parentheses either side of it). The other is a triangle with the ! in it. They both go out after a couple minutes.
What are they? Am I in danger driving it?

 

Yellow triangle with a "!" usually means the DSC is off or in action. If it's a constant, then DSC is off. If it flashes, it just means, the tires spun a bit.

 

The circle with the ( ! ) is the tire pressure monitor. You may have a low tire or it may need to be reset. I don't have my manual with me to tell you how to reste it (mine is an 05). I don't know how to reset it on R56.

 

Most likely, they are using the same tire pressure monitor and all you do is after adding air to a what ever tire may be low, depress the 'tire pressure button' next to the hand brake for a second or two and release. Once you proceed on your way, it will reset and the (!) will go out. So you may have to refer to the doorsill for proper air pressure for your tires and check each tire.