STATIONARY VEHICLE EQUIPPED WITH KEYLESS IGNITION AND AUTO ENGINE "START/STOP" FEATURE. VEHICLE WAS STOPPED IN DRIVEWAY. ENGINE STOPPED, DRIVER STEPPED OUT OF CAR, ENGINE RESTARTED AND MOVED FORWARD, DAMAGING HOME AND BARELY MISSED PINNING DRIVER AGAINST WALL. EXPERIENCED DRIVER, MOMENTARILY DISTRACTED, ASSUMED ENGINE WAS OFF, AND HAVING PREVIOUSLY DISABLED START/STOP FEATURE, BELIEVED THAT VEHICLE WAS IN PARK AS PART OF NORMAL SHUTDOWN - OWING TO ALREADY QUIET ENGINE. CALL TO DEALER SERVICE REVEALED "SEVERAL PEOPLE" COMPLAINED OF AUTO START/STOP FEATURE BUT SAID THERE WAS NO WAY TO RESET DEFAULT FOR THIS FEATURE - THE SOLUTION WAS TO REMEMBER TO DISABLE EACH TIME DRIVER ENTERED CAR (VOLVO HAS A DISABLE BUTTON ON CONSOLE WHICH DEFAULTS TO THE AUTO START/STOP AND REQUIRES DRIVER TO MANUALLY DISABLE EACH TIME CAR IS STARTED).