Hello, recently purchased a 2013 Model S 85. The car has a clean title and still under warranty. After purchasing I started to notice the quite common milling noise caused by a faulty drive unit. After taking it to the service center they plan on replacing the drive unit under warranty, everything is fine there. But they also threw in these other repairs that they say need to be made, these I am being charged for. I attached a picture of my estimate that shows what is being replaced and what I am being charged (under job #2). I would like to know if these are absolutely necessary. Has anyone else ever experienced this from tesla?