So basically you are saying to have a BMW you have to be over 30. Also, I don't want the BMW to look good, I want it as I like BMWs.
If the Police do keep on stopping me in a BMW if I get one, all I have to do is go to the cop shop, tell them what keeps happening with proof to back it up and the will put a tag on my car that will alert the Police in the car that I am over 17 and it's my car, job done - Bobs your uncle, fannys your aunt and slimdicks your brother :P