Well...when I picked up my 2017 Passenger (not worker) today, the sales guy said I hit the jack pot as it came with 4 keys. I was surprised, as the invoice said 2 keys. I wanted spares as my wife "misplaces" vehicle keys with rapid frequency and duration...6 usually keeps me ahead of the game. Figured the MB Gods were looking out for me. Just curious as to what is the norm.