I ordered oil filters for my 76 300D W115 and got a Mahle OX 1 D filter. Is this the correct one? The one I removed is a mm or 2 taller. It looks like it will work. The Mahle web site does not list my car. Also what is the big copper crush washer for its about 1 1/8" in DIA? It was not in my filter I took off. I am new to MB Diesels Thanks, Chuck