It seems Workshop and service and repair manuals are a thing of the past for Volkwagons. For the VW Caddy van anyway. Can't even get a Haynes (better than nothing) doesn't exists. The Excellent Bently Service manuals also seem to be unavailable. I had one for my trusty bmw 325i years ago - described everything with real quality pics and text.
I guess the reason is that VW is trying to force everyone to go to a dealer for £££ repairs - or is that too cynical. I know we need tools to read the odb2 ecu's etc but still, it should be possible to do many diy things - but without a service manual, even finding what and where all the sensors are is a trial.