This book is a favourite of the Westfalia Owners Web Site... , a not-for profit web site for VW Westfalia camping van enthusiasts.excellent mechanical & electrical graphics The Bently book is by far the most descriptive. the pictures and diagrams are concise and clear. I have purchased many others but found the official manual the best. the only negative aspect of this Bently books is that you should know the procedure well and use the book as a templet for clarification.