  Using the 770 ksec XMM-Newton survey of the Lockman Hole field in combination
with extensive optical identifications of the AGN population, we derive an
average rest-frame spectrum of AGN types-1 and 2. The most prominent feature in
the averaged spectrum is a strong fluorescent Fe line. In both type-1 and
type-2 AGN, a clear relativistic line profile is rev ealed. A laor line profile
with an inner disk radius smaller than the last stabl e orbit of a
Schwarzschild black hole is most consistent with the data, indicati ng that the
average supermassive black hole has significant spin. Equivalent wid ths of the
broad relativistic lines range between 400--600 eV. We used the disk reflection
model to compare the observed strength of the line with the amplitude of the
reflection component, concluding that to consistently describe the observations
the average iron abundance should be about three times the solar value.
