Having just upgraded my Nav II to a Nav III there are some major differences in the units. First, the BMW badged Garmin units are physically different. For example. The black case of the BMW Nav is fuel proof (although if you're spaying petrol around up there you probably need to stop riding and take a rest). One big difference is in the way the circuit boards are mounted internally. The Nav units are more robust and have better vibration protection Makes sense as they are specifically for use on a motorbike. Info above regarding using the mounting cradle and MP3 functions from Mark are spot on. I guess the biggest operating difference for me is the ability to locate directly a postal code, and "go to" Quite a nice change from the Nav II. And great here in the UK where I'm still a bit lost. Nav II has a CF card slot, I used a 1Gb CF card as more reliable with no moving parts. The III has internal memory. II uses City navigator maps. The III uses City Navigator NT Maps. (may be backward compatible but within the computer they are treated as separate software. NT gives the post code search function.) I feel the III screen much easier to read. Oh, one other thing, the BMW units come with a standard 2 year warrantee as opposed to the 1 year on the garmin. Quite a lot of changes to the menu selections too, just reflecting the change to user interface I guess. HTH
Jenna: Ocean Blue '06
Hilton: Head of the Steering Committee.
Rena: The Committee.
ET4 Thing 1
ET4 Thing 2