There is this light blue "M5" here, even I, knowing all the delicacies, couldn't distinguish it from the real deal. It was until he decided to race my friend's CLS63 that I realized that it was a 5 series (Stage 4?)
Morale of the story - some people already do spend a lot of money to make 5 series look like M5, to intimidate or for looks, I don't know but I do think that at least some of those people will also buy the expensive LCI LED retrofits for their "M5"s.