RktDr

Local dealership said it would cost £300 to upgrade my maps and suggested that there are better options them then for this! After lots of online research I decided to update the firmware from H4120 to 5274. I have the zipped file RNS_510_FW_5274_update.iso and have burned this to a DVD at lowest speed. When I put the DVD in the unit (no keys in iginition) it whirs around and then after 20-30 seconds comes back with a CD/DVD error. The unit will play a normal music CD without problems. I tried a different make of DVD and got the same error. I understood that there was no need to unzip the file as a file with the ISO extension should unzip itself. Am I wrong? I checked the contents of the unzipped folder and there is no executable type file in there so the zipped Is seemed the way to do it. Also wondering if a dual layer DVD will also not work when I try the maps update after the firmware update. Some research suggests that the laser in the Columbus is a bit poor. could this be why the music CDs work but not the DVD? Any pointers to help me load the firmware and maps V16 update appreciated.