The only thing a missing or burned-out third brake light will do is to cause the light-out alarm in the instrument cluster to illuminate. The cruise control is canceled by the brake light switch, not by the lights. All of the stop lamps could be out and the cruise control would still work and cancel normally.

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970