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Message: <blockquote data-quote="Schwepps" data-source="post: 401837" data-attributes="member: 3592">Congrats anxious! Good move to skip up directly from E36 to E90, as was your plan all along, correct? :top:I believe in the time range of 2005 to 2007, it was the first CBUs and the first CKDs. The first CKDs should have a few goodies that the CBUs didn't, such as adaptive steering, highbeam assist, etc. I'm not too sure when bluetooth and USB were added, perhaps in 2008. However the CBUs should have the base control units and wiring harnesses to add the available options at a much lower cost than for CKDs. CBUs are spec-ed for option availability, whereas CKDs have the options fixed already. For the CBUs look out for the oil burn issue of the early units. The other forumers may know more than me.My contribution is, don't discount the Sports off-hand. I too thought that the M-Suspension would be too harsh, but did a back-to-back test drive of the 325i and 325i Sports, and found that there was little difference. I also prefered the non-adaptive steering of the Sports as feels tighter to me. You should do the same back-to-back test drive at any dealer before you discount the Sports. Besides the M-goodies, it comes with iDrive and a great navigation system la! :love:</blockquote>