You should get the test light just to be sure. If you decide to replace the switch yourself it's probably about a 2 hour job for a first timer. There are some cables that can be pretty difficult to get off and back on again. If you think you want to tackle it I'll cut and paste the step by step from the manual.
Just to confirm. Is this your a/c control panel?
Ok, just verifying that you had manual climate control. The part retails for approximately $200.00. I would expect the installed price to be between $300-$350.00.
Here's the instruction:
Center air outlet console, removing First do the following:
Remove screws -arrows-.
And for the radio: