Our friend is with us on a trip in Round Rock Tx. and her RTS SE  keeps giving a Brake Failure Alarm on the screen and Park Brake flasheson dash, checked levels all OK brakes feel normal , alarm keeps clearing itself then reappears later, Any advice ?  Does she need to seek Help?  We called our service Mgr. 4 1/2 hrs away he said could be a low battery but after a6 hr. ride I would think it is charged.