2013 Dodge Charger drivetrain & axles problems

Tl* the contact owns a 2013 dodge charger. While driving 1 MPH and parking the vehicle, it suddenly accelerated. As a result, the vehicle crashed into a wall and pinned a caregiver. The air bags did not deploy. It was difficult to shift gears, which prolonged the injury. The fire department was notified, but a police report was not filed. The caregiver sustained minor injuries that required medical attention. The vehicle was taken to an independent mechanic, but the cause of the failure was undetermined.

When I first purchased the vehicle it had a tick I asked the dealership what was that they told me it was a (hemi tick) that all chargers had that sound so I drove it to around 100, 000 miles and while driving down the road it begin to make this loud noise sounding like a truck . I took it to the shop and they told me my number 3 plug or whatever it's called was misfiring took it to crown dodge and they told me that it was going to cost me 8,599 to fix this probkem that I always had.