Yes, I have the NT version. I'll try the NTU version as you suggested.
Many thaks for your usefull help. :-)

Br, John

BTW. for me changing a Garmin is relative new. My first gps was a garmin gps II for maybe 20 years ago. 6 years ago I have bought a Garmin 250 wich i until now use with topo maps. For use in car i have had several TomTom's and Navigon's. I have got this Garmin 3760 because the USB trough the active mount is not working. Charching no problem but it will not find the GTM35 traffic receiver. Also USB to PC over the active mount is not working. Now I use the micro usb port.