here's a site that has much of ETKA available via web browser.
Including the drawings of various systems.

For those of you who have not heard of ETKA, it is the software VW
dealers use to look up parts.

The first link is 2WD Vanagons, the 2nd is for Syncros.
Note, some of the parts you will see listed are for European market vehicles.

http://www.vagcat.com/epc/cat/vw/T2/
http://www.vagcat.com/epc/cat/vw/T2SY/

You have to register to access some of the pages/drawings, but it is
free to register.

This is really handy for looking up genuine VW part numbers and/or
drawings if you don't have access to the real ETKA software....

-Paul