Looking at the picture it sure looks like the crush washers on the banjo bolt have lost their seal. A new filter should come with replacement washers. In looking at the picture again, I see it is the banjo fitting at the pump, you might have to source those washers at the dealer.
Have you checked the leak with the engine running? I only ask to determine if it is a heavy drip or a spray. That might give some indication of what really is bad. Could possibly be a crack in the hard line (spray), but I think it's the crush washer.
'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.