Yup, I agree with Greenacres, sounds like the ignition switch. Try giving it a little jiggle. Look closely at the tick marks on the bezel, I think you'll find the key is just a hair off the mark. Once the jiggle gets it on the mark, the ACC should come to life.
Lots of jigglers 'round here
'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.