Car was parked/stationary with the emergency brake on and engaged, car was locked and no-one was near or in the vehicle, the car rolled into a car parked directly in front of it. further, while in the car and after engaging the car in reverse to park in a parking spot, then shifting into drive (to straighten or pull the car forward the car continued to aggressively roll backwards. this happened on at least 3 separate occasions. further, the car was parked/stationary and doors locked with no-one in the car and the windows on the passenger side both front and rear (on 2 separate occasions) opened all the way, on their own. further, the brakes on the car squeal loudly upon stepping on the brakes.