hey all,

i've done the popular bmw navi retrofit in my 740 e38 and i noticed my friends range rover(2004 4.4) has for the most part the same system, he wants xm/sirius radio and a mk IV computer so i was curious if it would be as simple as me ordering a bm53 radio and mkIV computer and installing them in place of what i would imagine is a c43 radio and mkIII computer.
any suggestions?