Yes, it has the bulb warning system. Interestingly, the 3rd brake doesn't seem to be monitored. I guess I'm trying to determine where the contacts and wiring go beneath the hat shelf, since I have tested the exposed parts with my meter and there is no voltage there. As mentioned before, I checked fuse #2 in the cockpit fuse panel and it is OK.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280