[F2]

This video explains the issue: https://youtu.be/8tOlNSrxcLs?t=49s

Apparently the crash test dummy's head slips between the steering wheel and the side curtain airbag to hit the steering wheel.

The Model S also doesn't seem to glance off the test structure in that particular test the same way other cars do and instead takes the full force of the crash to its firewall. Which certainly doesn't help.

Here's the Lincoln Continental in comparison: https://youtu.be/pMc4NERWChc

It's probably safe to assume Tesla is going to update the Model S in the relevant areas.