On June 12, 1958 the ISAR was baptized when Andreas Glas, Karl Dompert and R&D manager Zettler presented Hans Glas a pre-production model as a birthday present. The ISAR was designed to round out the Glas model program as a "step up" alternative. Hans Glas proclaimed: "The large Goggomobil is like what the thumb is to the hand." Power came from a front-mounted, two-cylinder, air-cooled, 4-cycle boxer motor with either 600 cc (19 HP) or 700 cc (30 HP) displacement, penned by the former BMW engine designer Ischinger. An engine mounted manual four-speed transmission (Porsche synchros) transferred power through a drive shaft and differential to the rear wheels. The unitized body construction was right up to par with the style of the 1950's. A large panorama windshield provided for good all around views. Inside, four adult passengers had ample room and the trunk had enough capacity for two large suitcases. In order to conserve space, the spare tire was mounted under the hood of the engine compartment. At the beginning of November 1959, in addition to the sedan, a station wagon was offered which could be ordered equipped as an ambulance or small delivery van. The sedans were also offered with a cloth sunroof option. After the Goggomobil, these cars saw the highest production numbers. Altogether 73,300 sedans and 14,275 station wagons were built. Production of the ISAR was stopped at the end of 1965.