What I did get for future gear oil changes on the 560 is one of those nifty Hazet wrenches. 14mm allen on one end, 13mm box on the other, embossed with a 117 part # and the Star. The allen is offset so there is a long end and a short end to it. It fits nicely between the diff and leveling valve.
'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.