Automatic 2004 Outback 2.5i Safety.
Cruise control was set to 110kph and we were pulling up a long incline.
The speed had dropped back to around 100kph. Without warning the cruise
control dropped out. Disturbing.

Pulled to the side and was engine idling normally - then drove off
normally. Used CC all the way home for the next 150km no problem.

About 10 minutes after the event I glanced at the display (which was
set to outside temperature at the time). It was flashing and showing
something like [20 0] for just a few seconds - like an error message.

At service a few days later the local dealer could find no problems or
stored errors - but apparently these are cleared if not repeated with
80 km or a certain amount of driving time occurs without a repeat
error.

Any thoughts.