for the m62 engine i believe (double check though, im going off the top of my head) it was 600 for inspection 1, and 900 for inspection 2.
as far issues, off the top of my head, leaking power steering lines, faulty oil filler cap (replace as soon as you get the car if previous owner hasnt already), leaking oil pan gaskets, rear diff...
i do not recall if the m62 engine was prone to carbon build-up or vanos failure... or if it was only the s62... if so look for 01.5/02/03 models.
lastly; the car should feel faster than the a5, bc it has more torque and whopping 2 more hp.