I acknowledge your issue; but, at present, that is the sole manual I am aware of that provides coverage.
By joining the 'official' club, the Mercedes-Benz Club, members gain access to the Mercedes-Benz Workshop Information System (WIS) and the Electronic Parts Catalogue (EPC), which are the same resources utilised by the dealer network. Mercedes-Benz permits this exclusively to one 'official' club in each country.