The filter on your 560 is at the very bottom of the power steering resevoir. If original, the filter will be a hard fibrous ring under the steady plate. Replacement filters are a pleated paper design with a steel top that replaces the steady plate.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.