I just bought a 2009 Speed 3 and attached my Sirius Satellite car kit and now I have interference. It sounds like a whirring noise which gets louder the higher the RPM's. Has anyone heard of something like this, and, if so, what can I do to correct it?

 

It's caused by a ground loop..... basically the power port you're charging off of is poorly shielded. Just grab a ground loop isolator from crutchfield.com and you'll be set.

 

Thanks for the help... I will try that. Other than that, I'm loving the car.

 

I just hooked up the GLI and it worked. Thanks very much for the help.