Stay focused, do great work, ask questions, take initiative, and be respectful. As an intern, you're job is to make the full-time engineers' lives easier. If they sense that, there's no reason why they wouldn't want to have you continue to help make the entire team's lives easier by being a full-time part of it.
Make your self valuable by getting involved. Make friends with all levels of employees. Take part in cross team activities and most importantly get the job done. set targets for every day, meet them. Keep a good channel of communication with your manager. Don't be afraid to ask for help. but if you do make sure you resepocate by getting work done.
At the end of your internship you will have a presentation. Ace it!