it's a special mileage counter that can be reseted to 0 by the dealer when they sell the car, that if it doesn't get past 199 km or something like that.
that means they can get the car on wheels to the showroom and move it around a bit, reset it and sell the car with 0 km on board.
too bad it only works once
I alway understood it was illegal for Manufacturers to set cars up like this. I know in the past, they wanted to set the mileage at the factory as 99,800 so that it would be around about zero when the car was delivered - but the practice was outlawed?