First EDC cars, using first-gen Bosch EDC, were the BMW 524td and 324td in calendar year 1986, for MY1987. (And, they had electronic timing control before that, complete with a needle lift sensor in the 4th injector.)
First DI diesel car was the Fiat Croma Turbo D i.d, also in calendar year 1986, for MY1987.
VAG's claim to fame is, in calendar year 1989, for MY1990, putting the two together on a bored out 2.5 liter version of their 2.4 liter IDI 5-cylinder diesel, and sticking it in the Audi 100 Avant TDI.