I need help changing the frequency on my Kenwood KDC-MP225. When I try
to turn in stations the frequency number is always an odd number, such
as 89.3 or 105.9, or 104.7. I need to tune in American Forces Network
in Italy. AFN broadcasts on two separate even frequencies. 106.0 and
107.0. On an old model in order to make the tuner pick up even
frequencies I had to push two buttons at the same time. There is no
information in the instruction manual. I have tried several two button
combinations but without any success.

If I remember correctly, you have to hold down preset buttons 1 and 5. While
holding these buttons down, press the reset button. Do not let go of buttons 1
and 5 until you hear the unit not making any more noise from resetting it. Let
go of the buttons, press Source to turn it on, and there you go.