Hi,I have a 2009 CL500 and stupidly reset my Comand therefore wiping my sat nav from the car, When I insert the 2017 map update disc I got with the car I get firstly: current version -1 do you want to update to V15, when I select yes after a few seconds I get : Map update not possible, the DVD is being ejected, please refer to the operating instructions. Any idea what I am doing wrong? Any help appreciated.Thanks