you will have to pull the instrument cluster to access the bulb holders. Look here
for an exact how to for your car. Be sure to replace every bulb in the cluster while you are in there.
'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.