I thought that there was a very detailed list of what needed doing and when in the manual, unless bosch has a shortened translation? Then again, I have the official training notes from the course at the Bicester HQ, so I usually work from them because I have written in a few memos... I can't write memos into the official copy of the manual!
There are clear indications for every six months, year, 2 years, and 6 years as I recall. There was a really helpful grid with each requirement, and it also laid out which tests were best done after certain repairs too.
If it isn't in the copy on Frank's page, I will try to PM you, bosch. Do you have the computer software to run the PPMs, by any chance? You will need that for some of the servicing and post-repair verification to be absolutely sure it is working perfectly.