Well the ticking will go away for quite a while, then come back for a little bit, albeit faintly. It's irregular now, but mostly it doesn't occur and the engine is quiet. I think I'm experiencing the effects of a gentle cleaning. Well if I wasn't sure there was a significant difference between oils before, I sure am now!

__________________
08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280