Tesla Mechanical Engineer interview questions

I went to a career fair in September and I unexpectedly received an email from a recruiter in April. I was asked to send in an updated resume and give a time to talk the next week. We set up a "exploratory" phone call/interview. After the call my next contact was a week later via email saying I hadn't made it to the next round. I personally don't think I did very well, but it was my first real interview. Recruiter was very concise, but polite and professional. On the call she told me I needed to submit a formal application online. If I had made it through I would have had to do 2-3 technical interviews over the next 2 weeks (may be a sped up timeline since it was so close to summer already).

Contacted by the HR. Initially had 3 interviews over the phone, 1st by HR, 2nd by an Engineer and 3rd by the head of the group. Was called for an onsite interview and was asked to prepare a presentation.