Extensive wiring diagrams covering the Signal Acquisition and Actuation Module (SAM) , CAN bus architecture, instrument clusters, and electronic ignition switches (EIS).
Companies like Brooklands Books publish physical Vito & Viano Workshop Manuals which are compiled by experts and cross-checked against official manufacturer data. w639 workshop manual
Guides for both manual and automatic gearboxes, including specific oil capacities, torque specifications for drain plugs, and installation steps. CAN bus architecture