Just got my car back and they fixed all my rattles! I had a cracking noise at the top of the driver's door which was fixed initially with removing the headliner and prying apart some metal. another noise developed in the driver's door that was fixed by replacing the window regulator. The cracking noise returned six months later and this time was fixed by adjusting the window regulator because the window was not seating properly into the top of the window frame. They also repaired a cracking noise coming from the base of the windshield. The car feels really solid now and the noises are gone and I can totally enjoy this car with its worldclass performance and comfort. Peninsula Infiniti in Redwood City, CA gets big kudos for friendly, considerate and thoroughly professional service.