I really need some help here...I have a 2005 S55 AMG that, at 35k miles, makes a loud 'squeaking' sound each and every gear shift while driving. All the MB mechanics have indicated that its 'spec' for the turbo charger to make that 'high performance' noise. NO repairs needed? Who pays $70k for a car that squeaks? Something is being hidden by MB. What is this problem and how to solve?