Check your fuses. The left and right sides are separate, if you blow a fuse you only lose one side (unless both blow). Not sure on the 116's, but on the 108's the low beams are fuses 11(R) and 12(L), high beams are 9 (R) and 10 (L).
'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.