SERVICE ACTION: START STOP BUTTON (SSB) INSPECTION AND REPLACEMENT (SA228) - THIS BULLETIN PROVIDES THE PROCEDURE TO INSPECT THE START BUTTON SWITCH CAP AND REPLACE THE START BUTTON SWITCH ASSEMBLY, IF NECESSARY, ON CERTAIN 2015 MY K900 (KH) VEHICLES, PRODUCED FROM DECEMBER 18, 2013 THROUGH MAY 12, 2014. THE SSB IN CERTAIN VEHICLES MAY CAUSE DIFFICULTY STARTING AND/OR SHUTTING OFF THE VEHICLE DUE TO A BROKEN START BUTTON SWITCH CAP.