set your Gyrocompass according your magnetic compass ( +10 degrees).
set your desired course for the automatic (the numbers below the gyrokompas on the same instrument)
fly manually to the desired heading and trim your aircraft.
enable the automatic........wait till is settled.
when on automatic make only small course correctins!
it does NOT work in the Ju 88 in the moment, because its Gyro is not working.....only Bf110 and He111
for much more details and a much better english read here:
http://forum.1cpublishing.eu/showthread.php?t=24782
the part about the He111