Hello All...
1992 500E, starts fine, brakes fine, but...

-at first touch of brake ABS & ASR lights come on & stay on
-instrument cluster DEAD except for illumination... ALL dials dead (RPM, Temp, Oil Pressure, Gas)
-Relay 201.821.00.47 buzzing loudly
-#6 Pin Error Codes: 13 (Stop lamp switch), 30 (CAN data bus to EA/CC/ISC control module interrupted), 32 (CAN data bus to DI control module, Left DI control module, Right DI control module interrupted)

Am I right in assuming I should start by replacing the Brake Light Switch?

ALL Fuses appear to be fine...