It has nothing to do with the dealer wanting to make money off of you.
The dealer has nothing to do with the not publishing of materials.
And Volkswagen corporate has nothing to do with the dealer making money for replacing a fuse. Heck, some dealers will replace the fuse on the service drive and not write a repair order because it creates more work (and frustration for the customer) to write a repair order, have a tech check the fuse, and invoice the customer than it does to just replace the fuse.
The reason the fuse diagrams are not posted is because there are SO MANY variations (build date changes, trim levels, etc) and the possibility of the customer pulling the wrong fuse is so great.
Hypothetical situation:
Imagine if you will, a customer has a Passat produced 02/2013. There are 5 different fuse diagrams.
Passat S produced before 02/09/2013
Passat S produced after 02/09/2013
Passat SE produced before 02/09/2013
Passat SE produced after 02/09/2013
Passat SEL produced before 02/09/2013
Passat SEL produced after 02/09/2013
Passat SE TDI produced before 02/09/2013
Passat SE TDI produced after 02/09/2013
Passat SEL TDI produced before 02/09/2013
Passat SEL TDI produced after 02/09/2013
So, On the gas models produced before the change, fuse F15 could be the power outlets, but on gas models after the cutoff, it could be for the KESSY system.
On TDI models before the change, that same fuse could be for the ABS while after the change it could now be for the CECM.
If a customer pulled the fuse for CECM thinking it was for the power outlets, that would certainly cause issues with the basic settings for the windows. If the fuse was pulled for the KESSY system, it could possibly cause issues starting the car. If it was for the ABS, who knows. The light could come on for interrupted power.
Who knows. The moral of the story is sometimes stuff has to be kept from the customer to prevent then from causing themselves more grief.
