Japanese wanted for questions about a car radio/navigator

Hey guys

Since a few weeks I proudly own a Nissan Skyline, straight imported from Fukuoka.
In it there is massive technical stuff, as expected ;) and also a Radio/Navigator. OFC the language is set to japanese, what´s cool in one way, cause I´m a fan of Japan and it suits the car, but unfortunately I do not understand anything :D
So maybe one of you japanese guys does know that Radio or could help me find the Settings to adjust language, if there is that Option.

The Radio is an Addzest 850HD
And I guess the site for it would be this one

http://www.addzest.com/ADDZEST_DYNAMIC/ ... o=MAX850HD

Surelly you can use "translate this site", but I can´t open Manuals in pdf with that nor does it translate properly as you could imagine.
So pls, I´d be so thankful if anyone could help me with that

Regards and thank you :)