We took the '83 300CD for a nice long ride this week.

Beaverdam (near Richmond VA) to Geneva NY.
Cruised the wineries and restaurants for two days.
Geneva to Bennington, VT to visit friends and explore the Hemmings museum.
Home to Beaverdam via dinner in Alexandria.

About 1600 miles, 7 days, no interstates. About 29 mpg. No faults, no failures. Air conditioner (previously converted to R134A) most of the way. Turned 340240 by end of trip.

I love this car.