I took deliver of a new S60 in December. The audio quality when making a bluetooth phone call is horrible. People can hear me fine but they sound bad to me. It only sounds bad from the 2 passenger front and rear speakers. It sounds like the speakers are blown, they make a distorted rattle/screeching sound. The speakers only sound like this over bluetooth phone calls. Radio and even playing music sounds fine. Tesla reset the bluetooth module and said it resolved the issue but after a few calls I can say for sure it is not resolved. Is this the norm? Has anyone else experienced this issue? I am using an iPhone 6 Plus with latest version of iOS if that matters.