by These days the 30th anniversary is being celebrated by perhaps the rarest version of the Mercedes-Benz 190. In 1990, the Mercedes sedan was turned into an electric car. 
Several Mercedes 190s were turned into electric cars. They tested sodium-sulfur and sodium-nickel-chloride batteries on them. They are more efficient than lead-acid batteries but worse than lithium-ion ones (which were not yet available at the time).
During tests, one of the electric cars covered 100,000 km. In 1991, the electric Mercedes 190 was shown at the Geneva Motor Show – they brought a version with two motors totaling 44 hp and sodium-nickel-chloride batteries. 
From 1992 to 1996, ten electric Mercedes 190s participated in consumer tests of electric cars. Then the sedans were decommissioned and moved on to more advanced prototypes. 
