- yes break the car in as per the manual.
- as I understand it, DS drive is like taking overdrive mode off (into sports transmission mode)
- sport mode button is suspension only as far as I know... use it for a stiffer ride and to also save on tires if you care
- aero kit cost me $2300 painted & installed but it depends on your dealership... they will try to make their profit here. I couldn't find it for cheaper installed so I said ok. One other wanted $3600 and another wanted $2800. It is 8 hours of labor and completely worth it to me. Cheapest (and riskiest) option is to buy the kit for cheaper from Morristown BMW (NJ) and have a local body shop paint and install.
- other tips: read the manual

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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr