I've been doing some reading on replacing a non-MFSW with a MFSW and, to my knowledge, the other parts required (beside the actual MFSW and the airbag if it can't be reused) are the slipring and the steering wheel control unit (and possibly a wiring loom). But, I read this in threads where the cars in question don't already have cruise control. I was wondering: if you do have cruise control, does that mean you won't have to exchange the control unit?