I Googled endlessly for "Standard Lieferwagen" and what came up? Nothing!
Useless bloody Google...
"Standard" is a horrible name to google, "Gutbrod" would have been better.
I see.
I just tried Googling for "Standard Lieferwagen", "Standard H 204", "Standard Lieferwagen H 204", "Standard Vierrad-Eil-Lieferwagen", same plus "H 204" then all of them with and without "1936" and got.... nothing at all.
I think to get a result on this vehicle you need to be in Germany; no wonder I couldn't solve it.
I'll try using Gutbrod as you suggest, although I did try that with many different additions whilst the puzzle was locked for me, again without success of course.. I think this one needed books, and there really aren't many books in UK with much on these vehicles..