Reliability Tips on used 2007 E70 X5 3.0si 7-seat

[byaru1]

Hi

We are looking at a used 2007 7-seat 3.0si E70.

Our first BMW, so quite excited (and anxious). It has about 95,000kms (60,000miles?)

1. How reliable are the n52 engines for the long haul? (200,000kms and over)
2. How reliable are the air suspension? What tips to keep it problem free?
3. Any electronics issues that can be prevented through early interventions?
4. It has the Sport Suspension. Is this supposed to be a stronger suspension?
5. Does the panoramic roof disturb (leaks, jamming, etc.. after a long period of use?).
6. There is the rear-DVD screen thingy in the middle. I don't like it. Can it just be easily removed from the car?

Thank you!