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Western Europe Sd Sat Nav -v4.1- Update
Driving Smarter: A Guide to the Western Europe SD Sat Nav V4.1 Update
Backup your old SD card before updating.
Do not remove the SD card while the navigation system is writing data.
This update may erase saved favorites and home addresses – export them first if your system allows.
Step 2: Check Your Current Version
Turn on your ignition (engine running is safer to avoid power cut-off).
Navigate to Settings > System > Navigation > Map Information.
Look for a line that says "Western Europe" or "WE". If your current version is below 4.0, skip straight to a full update. If it is 4.0, you are upgrading to 4.1.