I replaced my Axxera with a Kenwood Excelon 595. The rear camera still worked and the existing USB still worked. I do not have the side cameras. When backing up camera automatically comes on. When driving down the road with rear camera on you can still control the volume for the Radio. Very happy with the radio. I even have backup guidelines now on my rear camera. They were able to use the existing wire harness. I have a Ford E450
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