Not sure where the best place for this question is. When i have my 5 docked in my van (lighting to 30 pin adapter to an iSimple connector to my oem stereo) i can hear music and spoken directions just fine through the car speakers. i can skip songs with the steering wheel controls and the 5 will charge. However i cannot hear Siri read text or any other of her voice prompts through the car speaker. All of those go through the iPhone speaker. Is there a fix for this.