If the leak is very minor, let it go and watch the dip-stick..you never want to run a 104 on the Full oil level indicator mark ..1/2 way/hot is best and I have seen them actually stop leaking if one keeps the level on the low end of normal capacity.
Benz has TSB on that and recommended 1/2 quart less capacity on the earlier ones and a change in the Manuals to reflect the change.

__________________
A Dalton