Craig, the E&R book has lots of serial numbers which I have emailed you. Bill, There is a chapter on military vehicles. No 540k chassis pictured. In fact no MB pictured as far as I can tell. The first paragraph reads as follows: "In 1939, with the beginning of World War II, he production of luxury cars was stopped. The chassis delivered from Horch and Daimler-Benz did not show any difference from vehicles which were produced during peace-time but the grey and chromeless bodies and the artifical leather upholestry showed so much more of the war's effects" It looks like almost all the bodies ended up on 320 or lesser chassis and all the pictures are of Horch or DKW.