How do you change the transmission oil on a 2005 mini cooper?

To change the transmission oil on a 2005 Mini Cooper, first, ensure the car is on a level surface and securely lift it. Remove the transmission drain plug to let the old oil drain completely, then replace the plug once drained. Next, remove the fill plug and use a pump to fill in new transmission oil until it starts to overflow. Finally, replace the fill plug and check for any leaks.