[JamesM3M5]

You need the Longitudinal Dynamics Module, SZL with cruise control stalk, wiring, and a system to code all the other related modules. You must also be able to add the proper option to the vehicle order. Modules that need to be coded are the DSC, IKE/KOMBI, SZL, and possibly program the DDE.

And this is the completely wrong forum to ask this question. You should ask the moderators to move this thread to the BMW Coding section, since most of the work is going to be coding the modules to work with cruise control.