It amazes me how the internet devalues peoples opinion about the value of information. Its almost twenty years now since I would have given a fortune for info on those systems.
Now the advice is free and and I suppose that $116 seems a lot to buy a small portion, since its very unlikely you will make a profession out of it. Seems cheap to me that a manufacturer would provide all its info to repair its cars for less than a days wages.
Bosch Master, ASE Master, L1
33 years MB technician