Disklavier

Sorry for the barrage of questions, but I've left a couple of messages 
at my local Yamaha dealer and they haven't returned my calls yet.

I recently acquired a DC2A (C2 w/ MKIII) piano from the original 
owner.  I only received 2 (Disklavier) manuals for it: The Basic 
Operation Manual and the Advanced Operation Manual.  Should there be a 
manual specific to the acoustic piano?  If so, what is that part 
number?  Can this be ordered from Yamaha?  I seached their manual 
library and came up empty.

Also, is the lock for the lid on the C2 functional?  Mine did not come 
with a key and since I don't have the manual, I don't know if this is a 
functional lock or just decorative.  If it's usable, are all the keys 
the same?  Can I go to a local locksmith and have a key made?  Does 
Yamaha sell replacement keys?

Thank you.

--Ron