black04

I have an04 E500 and it doesn’t have a backup camera. I would like to install aftermarket one. I prefer one mounted on rear view mirror. Wireless is good or what ever is available is ok. Just don’t know which one to get or which is better one to get. Like a simple install if possible and as few wires as possible. I have looked at thousands it seems but don’t know which one to get. Any help would be greatly appreciated. I have looked online here but still don’t know what to do. So if you can clear the fog for me I would appreciate it.
thanks
Earl