Your car uses a built in dock and not a USB port to interface with your iPod/IPhone? EDIT: OK, I am confused on this and know it's come up several times before in this thread, without a formal answer. The dock adapter is only needed for plugging your iPhone into docks. The adapter itself is what's causing the issue here. If your stereo interfaces with the i-product via USB, then you should still be fine right and have no issues here right? That's my understanding. Even if you car does have a built in i-product dock, wouldn't it also have a USB port in addition to this? Otherwise they are locking you into Apple's products with your car and only a single one at that.