dunhill - I know exactly what you mean. I found out on my new 2018 that there was a little bit of excess plastic on the plastic part which engages with the bonnet hole. This excess plastic looked like the remains of when the plastic has been taken out the mould. I used one of my wife's old nail files (with permission)!! to file down any sharp ridges. No damage done to the plastic and the whole thing feels smooth and engages properly with the bonnet hole. Incidentally, my 2012 and 2016 CX5 were smooth with no problems. I didn't bother to take it back to the dealer as they would have either said "It's a feature sir to help keep the bonnet up" or they would have broken off the plastic completely, "There you go sir, problem solved"