Hi, update, I did use an aftermarket brake light switch from gap in atlanta, i got an oem one this a.m. it made no difference. not throwing up any codes in modis. took car to dealership to scan, they cannot get any codes from it. the cruise does not work when the light is on. can i disconnect the steering switch on gear box to bypass? the mb technician recommended to replace the unit in the right control box (the one that holds two fuses.) i hate throwing parts at cars...............