I have accumulators on the way, figure it can't hurt anyway. When I pulled the filter out of the reservior I accidently spilled an ounce or so of fluid, now the groan is quieter. Glad to hear of your experience, gives me hope. It will be Saturday or Monday before I get this done, but I may get to the bleed screw tonight. BTW, I couldn't turn the nut on the link at the levelling valve Tuesday night, and the bolt has just a round head, like a carriage bolt. Any trick to removing that other than some penetrating oil?
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)