That is the reason I had channel locks in my minimal tool kit for the Las Vegas run in the 560. Tightest darn oil cap I have ever met, least I don't have to worry about it vibrating off at speed.
'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.