Shift sooner and harder to obscure internal leakage.
But if one were to be covered with StarMark one might wish to solve the internal leakage. It's not your problem! Get it handled as soon as you feel you have given their patch some time. Once you are beyond that the real fix will either include a new valve body (less likely) or internal resealing.
No time like the present.
Bosch Master, ASE Master, L1
33 years MB technician