Robin,

if you read German, I would like to reccomend the following book:

"So wird's gemacht #35
VW Bus
VW Transporter
Diesel 50-70 ps
11/80 bis 12/90"
ISBN 3 7688 0436 4

Available at http://www.amazon.de, I have the wasserboxer version of this book, and while it isnt exctly a Bentley, this covers the
diesel and turbo diesel, and some aspects of the Westfalia equipment.

PerL
87 Syncro 112i