Originally Posted by tom @ eas
You have a TCU pictured, the Combox is pictured in post #1.
In order to upgrade to the Combox, you will need a combox (of course), wiring harness as well as coding. Since we are not local to you, I would recommend you contact BimmerTech as Technic stated earlier to assist in remote coding.
Well the picture i posted is from 2011 335i.. I thought they came with combox... no? I understand it's different from what Boostin FD posted, but i was under the impression that there are 2 types...