I switched clusters. The newer unit gives a warning "Defective Device" & ASR/BAS light is lighted at startup. If I press reset, message disappears & all typical odometer /outside temp/ trip meter display & work fine till next startup. Is the cluster actually defective or due I need to go thru a reset process? Or is this unit actually not compatibale for my car?

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83 280TE- 5 spd, 16.5mm rear sway
85 280SL- 15" Bundts, 5 spd