1902 was also the year in which gläser-karosserie decided to diversify into car bodies, although it was not till 1905 that they were able to deliver their first vehicle, using a chassis from daimler of untertürkheim. heuer continued to build the business, while his brother robert heuer took over the running of the operation in radeburg. at the luxury end of the market customers were able to specify highly individualised bodies. the company acquired several patents including one for a window opener known as the "silentium", reflecting its qualities. a small number of tramcars was also produced for dresden during the early years of the twentieth century. during this time, the radeberg operation became increasingly closely integrated with the business in dresden, and taken together the business provided work for approximately 200 people. in 1905 the acquisition of a small steam powered generator at radeberg gave the operation, for the first time, access to a power supply to support the hand craftsmanship on which operations depended.