Just finished Ep 19 of Law and Order season 1.
...now The School for Scoundrels from 1960 and starring Ian Carmichael, Terry-Thomas, Janette Scott and Alastair Sim. Peter Ustinov wrote some of the screenplay for this minor masterpiece.
Made at Elstree Studios and premiered at the Warner Theatre in Leicester Square, London on 24 March 1960, where it ran for a month.
The two salesmen (Dennis Price and Peter Jones), who sell him a ramshackle 1924 "Swiftmobile" were characters from a radio show some years earlier and their catch phrase of "run for it" was reused.