Disklavier

Sorry for a "beginner" question, but I just purchased a 14 years old
Yamaha "MX100 II" and when I read the messages that you exchange in
the group, I cannot understand the disklavier classification.
I am now wonderning if it is different from a country to another (I
can even not find "MX100 II" in the disklavier models on the
yamahamusicsoft.com site!). Can anyone help me find my way in the
different type of MX100 disklavier? 
I am also looking for a user documentation on this model.

Thank you in advance for your help.