Personally I would have fun with it. 3M makes a paint that is for sporting events (football games and the like). I would paint a nice big lemon on it and why. Then park it in front of the dealership on a Sat. Take a pic and send it to BMWNA, the Dealer and every BMW website around . It washes off with soap and water, but not water.
Let them know that you have set aside several hours every week to park the vehicle near their dealerships and eat your lunch.
But I like a good fight now and then
