Kasun de Silva

I recently purchased a Toyota Vitz 2007 (2008 body) with 67,000km. The previous owner has been using the car for the past 2 years and had not changed transmission fluid. I am wondering whether to change it or not. There is no way of checking the quality of the oil due to the lack of a dipstick in Vitz. On second thought, is the transmission oil not supposed to be changed in this CVT gearbox (I assume it is the sealed type because there is no dipstick)