Would you be able to tear you mcl by hitting it on a dash board?

Tear muscle hit dash: Mcl tear happens when your knee is hit directly on its outer side with a force, or by repeated stress.It will be really hard to tear mcl by hitting the dashboard, but if you try hard enough you probabely can.

PCL most at risk: Dashboard injuries classically injure the pcl, but could also injure the mcl. Best to see a knee/sports medicine specialist for a good examination and possibly an MRI to evaluate the knee ligaments and diagnose your injury. You may need bracing and physical therapy or possibly even surgery.