Can I upgrade my 95 M3's on board computer to a 98? Yeah I know the new 1's have two connections where my 95 has one. Is it possible, and if so how?

well do u have a 18 button currently. cuz i know 18 button uses 2 and the otjher ones use only 1. i retrofitted mine to a 18 button.

I have an 11 button in my 98, but I know you can wire in the features for an 18. I'm prob picking up an 18 button soon and will be digging up the diy for that, so let me know if you need it and ill send you the link to the post when i find it