who were invited to submit the cars to technical and customer appraisals. On the basis of the reports received following this exercise the engineers at Renault's Billancourt plant were able to apply the necessary modifications before volume production of the "AEB2" got underway in April 1938. On the publicity front, a non-stop endurance run was organised during the closing days of March 1938: a Juvaquatre was driven flat out round and round the Montlhéry racing circuit (a short distance to the west of Paris), driven by a team of four drivers who took turns to cover a distance of 5,391 kilometers (3,350 miles) during 50 hours at an average speed which was computed at slightly under 109 km/h (68 mph). Details Bodies During the initial production phase, all Juvaquatres came as two doors saloons/sedans (sometimes described in francophone sources as a "coach" body). The steel body was welded into the chassis-platform in order to create what was for most purposes a monocoque body shell. Instead of perching on the front wings, the headlights, were integrated into the body, which was seen as a clear tribute to the Opel Olympia, although the idea of integrating headlights in this way had originated not with Opel but, in 1934, with the American Hupmobile Type 518 of 1934. A camionette (van) version of the Juvaquatre was developed soon afterwards for commercial usage and was used extensively by La Poste. When the van version reappeared in 1948, after the war the "camionette" appellation for the little van was switched "fourgonette". Public demand for four-door cars, and the introduction of affordable 4-door models from the rival manufacturers Peugeot and Simca, led to the appearance of a 4-door Juvaquatre (normally described in French-language sources as a "berline" bodied car) from April 1939. Perhaps 80 2-seater coupé bodied Juvaquatres were built between 1939 and 1946, of which most were based on the prewar model and produced in 1939 and 1940. There was probably an intention to resume production of the coupé after the war, but the tooling was never commissioned to produce the necessary steel body-panels using heavy presses, which would have been necessary to produce the design in commercial volumes. According to one source a final batch of 30 coupés was produced between December 1945 and January 1946, while elsewhere it is recorded that production of this version was not resumed after the war. Nevertheless, one was