Are the automatic A/C buttons backlit on the 82-89 107 SL models?

Is there a light bulb behind the A/C buttons in the center console that illuminates them?
I've had my car so long I don't remember, and mine does not light up.
It's a 1985 500SL with the full auto Air Conditioning (push buttons), but would be the same for most any US model 380SL or 560SL.
Was wondering if I should take the burl cover off and change the bulb if it does illuminate. I would assume it is supposed to.
Everything else does
Thanks!