CC’er Teddy posted these shots of a vintage Mercedes out and about on a rainy day in Portland. As best as I can tell, it’s a 190 (W121). I wonder if it’s a diesel. Only Teddy can tell us, as he would most surely have heard it if it was.
The W120/121 arrived in 1953, and were a giant leap forward from the pre-war type 170/180 that it replaced. Until 1956, it was only available as a 180, with the old flathead four gas engine, and the legendary 0M636 diesel four. In 1956, the new SOHC M121 four became available, giving it performance commensurate with its modern body and lofty price.