So far certified repair and maintenance centers were trained by Apple and receiving instructions and manuals in English. Those "service manuals or source manual describe how to identify, operate and perform repair procedures. Such documents are restricted to internal usage.
Apple recently changed its policy and just released service manuals localized in different languages, the first two samples are dedicated to the unibody MacBook and 15" MacBook Pro.
This is a good idea and will for sure make repair center's life easier for training their technicians and further increase their support centers, especially required with the increase of the Mac market and users.
PS: as those documents are reserved to internal usage, do not request them from us, we will not distribute them.
[translation by Linathael]