I am going to be pulling my gauge cluster an want to replace all the bulbs with LED's. Does anyone know how many bulbs I am looking at? It is an '88 E250. Here is a pic of the cluster:

 

Not a clue with that cluster but it can't be more than 12 right?

I'd get a dozen and pull the heater control panel too, should be one or two there---turn signal indicator bulbs too.

Change 'em all while you're in there!