Okay, here:
260 "absence type sign on trunk lid" - This checks out, still then a mystery as does have the rear star and "280TE".
411 is manual sunroof
431 "Kopfstützen im Fond 3-fach", which Google has "Headrests in the rear 3-way", which not sure what "3-way" means.
466 central locking
532 "automatic antenna without radio installation" This one find very interesting, as she has a very nice Blaupunkt eight speaker system that was top of the line then.
591 "heat-insulating glass all-around with rear window pane single-sheet safety glass Find interesting as the Russian site's translation botched that it is safety glass. To me, looks green tented, so not sure why this isn't mentioned in this reference.
682 - "Fondsitzbank geteilt 2/3:1/3" Which I translate to rearseats split in 2/3 and 1/3; apparently you could get a wagen without a rear seat for cargo hauling, like ambulances and hearses.

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Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.