Hello, I have a preowned 2000 528 sport package. It has been making a whistling sound especially at 75-80mph. The sound is reduced when slight pressure is applied to the accelerator. After a road test and inspection, the tech at BMW said that it's due to the suboptimal condition of the Continental tires, even though I think the condition of the tires is fair. Has anyone else had the same problem? By the way, the tech recommended Bridgestone. Thank you
Chad
Chad