Originally Posted by
Surething
Bit late into this, but yes you can set the audible overspeed alert on the 3597. The US/EU firmware speed alert feature is controlled by the Locale selected. When you hard-reset or clear NV on any nuvi, it will usually default to it's market localization for the setting. Instead of selecting Australia on the 3597, choose one of the EU locales which support the alert such as UK or Luxemburg. You can then go to the hidden Diagnostics Page by holding the upper RH corner of the Volume page for ~6 secs [or press 'speed' on the map page > hold the Speedometer]. In Diagnostics Page, press 'Developer Info' then scroll down to 'Change Locale' [the second bottom item] and select Australia there. ASR will still work if you have British text and Karen or Lee voice selected, the map theme will be the EU one which has the SLI in the red circle instead of the default AU/US with the SLI in a rectangle and if you go over the posted speed by even 1 KPH the actual speed indicator will still become red shaded and you will receive the audible overspeed 'ding ding' warning.
Tiny is spot on about some SLI reading being unreliable. What i liked about the 3597's predecessor the 3590 was the ability to make corrections to the posted speed limits. That's no longer there in the 3597. Garmin giveth and Garmin taketh away ...
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