The sheepskin i bought from someone on craigslist fit perfecty without having to remove the seat or remove the armrest when i had it on the SD. Now its on my dads 78 300D and still fits perfectly without having to remove the armrest. Although i did have to remove the headrest.
The sheepskin on my 87 300D that i bought at kragen doesnt fit correctly but looks ok. still didnt have to remove the seat or armrest