Check codes (normally throws three), but I'm betting on the brake light switch...My W163 and W208 threw the identical warning lights for the EXACT same issue. Replacement solved the problem on both vehicles

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car