Hi all! I have a 2005 VW Touareg V6 3.2 L, I’ve had a coolant leak for some time and VW misdiagnosed it when I took it in, but I’ve stayed good on keeping coolant completely filled! Recently, within 2 weeks, my car has had a bad idle, like rumbling and shaking when in park, my alternator has become scorching to the touch, and I have this really loud whiny noise when I’m not using the throttle. My check engine light came on and it said random miss fire? Has anyone had any of these problems? What helped? Thank you in advance.