Nice looking interior for a '79 ! Schtic Shift too!
I am surprised the stuffing (seat pads) in that car has lasted this long, mine went out years ago.
When it gets old it crumbles, you will see "stuff" falling out of the backside onto the floor behind the front seat.
I replaced (or had them replaced) using OEM pads from World Upholstery.
Looking at Bamboo I like it better than Palomino

Dieseldiehard
1971 220 (gas) 4-spd manual 104041
1979 300TD w/ ’85 turbo engine 289560
1983 300D 237490
1985 300TD 206150
1975 300D (looking for an engine)