It comes in two parts and you can purchase them at Global Engineering Documents
https://global.ihs.com/
Just enter VDA in the document number search and it will bring up a list of VDA documents. Then locate the one you want.
VDA 4 P1 is $36 US dollars
"Quality Assurance Prior To Serial Application Partnership/Processes/Methods"
VDA 4 P2 is $22 US dollars
"Quality Management In The Automobile Industry Part 2: Quality Assurance Before Series Production"