1. Download the appropriate version of WebUpdater software to your computer.
2. Connect your compatible n?vi to your computer.
3. Launch WebUpdater.
4. Once WebUpdater is running and your n?vi is connected, you will see software update options.
5. Select ecoRoute from the list of update options.
6. Select ?Finish.?
7. Your n?vi will then re-start and ecoRoute will be available for use.
Download WebUpdater (you will redirected to the Garmin’s website)?
Source: http://www.garmin.com?