Patrick Macnee, The Avengers, 1968, Original Pub. Still
Patrick Macnee is Steed in this rather strange hotch-potch of a movie which was made up of two Avengers episodes: The £50k Breakfast and Murdersville.
Diana Rigg was Emma Peel, and the car appears to be the 2L Lagonda that Steed used for a while. http://www.imcdb.org/vehicle_241491-Lagonda-2-Litre-Speed-1930.html
This still was used in the German marketing, and has both a bumpf sheet and a flyer attached to the back, as you can see in the smaller picture.