The instrument cluster is a condition and originality tell: garaged cars keep vivid orange gauge markings that otherwise fade to yellow, and clusters develop 'dreaded dot disease' white spots in humid climates. Buyers watch for non-original shiny gauge rings and for true-mileage-unknown clusters, and one owner cites the correct cluster part number 126-542-6760.
Instrument cluster: gauge color, dot disease and TMU
Mercedes-Benz SEC Coupe (C126) · buying