1991 300te 4matic question

[robaincltnc]

I have a 91 300te 4matic. The car is running fine. I noticed that when I turn the key to position 2 all of the lights come on except the 4matic light. The triangle light in the MPH cluster lights as well. The 4matic is the only light that doesn't burn. At the recommendation of some of you all I decided to run 2wd until we have bad rain snow and sleet. I went to shut the tranny to 2wd by flipping the red test bar and was expecting the 4matic light to come on showing that it wasn't engaged..and of course, it didn't light...does it sound to you all that the 4matic bulb is burned out or is something else going on?

Thanks for your replies..