Changing the speedometer and on board computer
 

ok so me and my wife are buying a 2015 4 door mini cooper hard top (not sure much else on it im new to mini coopers) but we live in germany and we are wanting to change the speedometer to kmph its currently in mph it is not digital i was wondering a good place to buy a digital one and any help installing it also the computer in the center is a basic radio model not a screen and was also looking to replace and install one with a touch screen navi any help would be greatly appreciated.