Yes, the red and blue rectangles on the central vents are back lighted. You have to remove the central vent assembly to access the bulb. My tech did it to change the bulb for the central Parktronic screen on my S 500 L. Problem is I don't remember exactly how to remove those vents.

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A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]