You cannot just take a car onto the beach at will. You need to contact the City of Miami Beach Office of Film & Print to obtain a permit for a commercial shoot, and apply for a VBAP (Vehicle Beach Access Pass). You'll need to provide a completed Indemnity form for the city, as well as provide a certificate of liability insurance in the amount of $1,000,000. In addition, you'll need to hire an off-duty police officer to escort the vehicle on and off the beach.