I can say assuredly that '88 TEs had the self-leveling, and that the 300TDs (86-87) did not. And I'm fairly certain that all the later-model gas-engined TEs had it too.
"If everything seems under control, you're simply not going fast enough" --Mario Andretti
1995 E500 street car
1986 Porsche 944 Turbo S track car