There is ongoing discourse here about the validity of that chain stretch method on a OM61X engine. Due to the parallax error in your photo of the cam mark, it is hard to tell if they are aligned. But assuming they are and that your stretch (or elongation as some here prefer) is 5 deg, that is not going to be a big deal for a trip to oregon. Save the work for later.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).