Ok, it looks like the question of whether this car is a Euro has yet to be answered. Clues for a Euro are:
1. Smaller bumpers
2. Two rubber strips on the front bumper (blank space in the middle), while the US version has rubber all the way across.
3. Cloth interior
4. Manual A/C controls
5. Manual transmission coupled with a 5 cylinder (300D) engine.
6. No turbo on a 300D after 1980.

A 5 banger with manual is the holy grail of the 123s because it offers the easiest possibility of building a turbo-5 / manny tranny combo. You already have the right flywheel, driveshaft, and shift linkage. Just to make sure this is clear, for 1984 a US 300D will have a turbo, and a Euro 300D will not.

When checking for rust, also lift the carpets and check underneath - especially in the back. If you get close to buying the car (this is more work), pull the plastic panels from the sides of the trunk and check for rust at the bottom. The other common spots are the lower rear part of the front fenders, and under the battery tray.

__________________
Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References