Changing language in GPS-NAV

I have recently purchassed a glider with L-NAV and GPS-NAV model 25.
However the display is in German. I have searched the manual, but I
cannot find how to change it to English. The Cambridge - Aero site was
of not much help either.
Any suggestion on changing the language would be appreciated.

Thanks

Paul

Tony Verhulst wrote:
> Paul B wrote:
>> Thanks Paul, no wonder I could not find it in the manual. I was
>> expecting a simple software command, which it of course should be.
>
> Yes, should be - if the instrument was being designed and built today.
> Remember that there was a time when memory was not only expensive but
> you simply couldn't physically put that much into something the size of
> the Cambridge display.
>
> Tony V.

Point taken Tony, even though I am not sure that those limitations were
in place in mid nineties, considering the relatively miniscule
requirement few text messages impose.

Paul