Cause unknown. the vehicle was stopped just before entering into a head in parking space when with the brake depressed, the vehicle accelerated suddenly and uncontrollably causing it to jump the curb and take down a retaining wall. it continued through the wall until it was stopped by a tree. vehicle was a total loss. vehicle settings at the time of incident were as follows: there is no autopilot on this model s and cruise control was off. additionally, the car was set with creep mode off. hvac was on.