Hi everyone, I need your advice on upgrading the steering wheel on my 2004 E500. I have an e63 wheel from facelifted e class,and as I have recently found it is not a straight foward swap, becouse of difference in TCM. The changes to TCM module were made by MB in 2005. So now , I have to swap TCM module (or something else?)from post 2005 car ,in order to make horn and buttons work. Would someone please list the parts needed or give me some words of wisdom, that you think might help me to make everything works. Thank you in advance.

 

u need a new airbag also...

 

guess where the horn and buttons are??