That's the service due caution. Don't have my E90 anymore but if I remember correctly if you start the car it should tell you that the service is due with that caution shown. You can check what service is due by scrolling through your OBC menu with the up down scroll selector on your indicator stalk. Scroll through all the items until you get to "service info" then press the BC button on the end of the indicator stalk. Then scroll through the service intervals with the same scroll selector used earlier. Will tell you how many KMs or time till front brakes, rear brakes, oil service, brake fluid etc are left. Should tell you what you need to know. Hope this helps dude.!
Showtime.