The 15W-40 oil is a "universal" oil, used all over the world in both gas and diesel cars. I used the previous iteration of Delo (non-Low emission) in my 420SEL, which has a similar engine to yours, and have used it in my W202's 4-cylinder.

Wix is also a good filter, though Ozawa is right about ensuring it comes with the crush washer and the rubber o-ring gasket for the filter housing lid. Certainly the Wix I've used on occasion for my W202 came with the o-ring.

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-- Paul W. (The Benzadmiral)
('03 Buick Park Avenue, charcoal/cream)
Formerly:
'97 C230, smoke silver/parchment; '86 420SEL, anthracite/light grey; '84 280CE (W123), dark blue/palomino