I would discouraging taking the time to change the sender if this is the only symptom. My OM603 oil warning light comes on when I am at at stop on a road with a lot of side slope (aka crown). I have a new sender, new oil, correct level, etc. I have learned to simply ignore the light at those instances.

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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).