Find an E70 without 3rd row seating and you will not have air suspension. Going from air in my last E70 to no air in my new E70 I can barely notice a difference and the spare tire is worth more to me than the 3rd row seating which we never used.

Other than that plan on doing glow plugs and module ($400-ish in parts) if you do it yourself and eventually injectors (about $1600 for all 6) they are pretty reliable. Eventually you will delete all the emissions stuff because when the DPF goes around 170k miles it's cheaper to delete and tune than it is to replace all that crap. My last E70 has 225k on it when I sold it and still ran great. I bought another E70 for just that reason.