Dan,
What kind of car do you have?? In my 230SL, there are only TWO blubs. One clear blub in a clear plastic cylinder around which the TWO left levers are attached. Another for the two right levers. The transparent (translucent?) plastic in the colored plastic levers produces the color.
Do 280SL's use 4 bulbs because the levers are not transparent/translucent?
Rodd
Powell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both tops
1994 E420