So did LH and Motronic with better fuel economy, lower emissions and more power. Mercedes was being lazy with its 90s Kjet cars. The late CIS cars with both electronic and mechanical injection components are diabolical to diagnose and maintain. All EFI cars have 1 fuel pump and 1 pressure regulator. Thats the extent of the mechanical side. The electronic components either work or they don't work. They are not subject to mechanical wear and adjustment. Fuel injectors, sensors, FPRs and pumps are all standardized and interchangeable with cars from a dozen different manufacturers that also used Bosch as a supplier. I've seen plenty of nice Benzes go to the JY in California because they failed emissions and from a Kjet fault. People generally prefer what they're familiar with but selling cars in 1993 with mechanical fuel injection is pathetic. Bosch EFI technology had gone through many generations and was very mature by the mid 80s. The 16 valve 190e could have been a truly great car with EFI, on par with the E30 M3. There is no excuse.