D-Jetronic was the first successful mass produced electronic fuel injection system. It was based on initial development work done here in the US by Bendix working with Chrysler. In '58 Chrysler, with great fanfare, introduced the "Electrojector" injection system as a very pricey option on several car lines, though due to the cost it was mostly applicable to the Chrysler 300. Somewhere between 15 and 50 cars were made with the system, but it didn't work well and almost all of them were converted back to carburetors by Chrysler. They washed their hands of the concept, and with nobody else in the US being interested (GM of course had their own mechanical Rochester injection system that actually worked), Bendix sold the patents to Bosch. Bosch knucked down and spent many years developing it before introduction.
D-Jetronic was still a bit of a handful when first introduced in the late '60s on a variety of cars - Saab, VW, Volvo, Mercedes, and Citroen were early adopters. Part of the problem was dealership ignorance, and part of it was just that the system was pretty complex and had some wear items like an extra set of points in the distributor. Eventually they solved most of the problems and it worked OK, albeit not well enough to last beyond the mid-70's when it was replaced by a new electronic system (L-Jetronic) and a new low pressure mechanical system (K-Jetronic). Both the L and K Jetronics are big improvements on D-Jetronic, but D was well made and if maintained properly the systems seem to last forever.
Pic below is of a '73 Citroen with D-Jetronic . . . lots and lots of intake plumbing, wiring, and little electrovalves. They managed to get slightly better fuel mileage when compared to the normal Weber carbs and a small but useful increase in power, showing that D-Jet could be impressive when working correctly as the Webers themselves are pretty good. I think they were too scared of what American dealership mechanics might do when confronted with this, so Citroen only sold the carbureted version here.
CFZ, I've always liked the 99. When I ran a later 900 Turbo with the twincam engine I often wondered if it would be possible to squeeze one of those into a 99 because the 99 is both prettier and quite a bit lighter . . . what a cute little rocket that would make!
