The badges are for the car, based on the mileage on the odometer. The pins are for the driver and are based on mileage the driver has put on MBs. SO if you have owned 4 MBs over the last how many years and put a total of 250,000km on all of them the lapel pin is for you. If your car has over 250,000km on the odometer no matter if it's all your driving or not you get the grill badge for the car. That's my understanding. I had the 250,000km grill badge for my old 420SEL.

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Jason Priest
1999 E430
1995 E420 - retired
1986 420SEL - retired