@StBaumy

Try with this:

Spoiler:
http://www69.zippyshare.com/v/15416075/file.html


Open folder for repair and flash in pre boot

when your nuvi connect to mass storage format it withprep usb

after format create on nuvi new empty folder with name Garmin

open folder Original and flash in pre boot

after this run webupdater and update all.