I hope someone can help! I have just purchased a motorhome with a Kenwood KVT 727DVD and KNA G520 GPS. I have the manuals for both but cannot solve this problem. When the vehicle is stationary and with just the radio on I adjust the volume of the GPS to 100% and the voice is clearly heard saying '100'. However when travelling the radio mutes for the voice direction but the volume is so low it cannot be heard. There must be an easy solution??
Also - how do I update the software - mine doesn't show the A14!