On some models the trip reset button also serves as the potentiometer knob. Possibly you turned as you pushed and effectively dimmed your lights. Try twisting it both directions, then go full closckwise for the brightest setting. See if you dash lights return.
'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.