The only issues I've had with my Fit EX-L with Navi is with the navi and iPod interface. I assume it is why my iPod freaks out sometimes and I have to do a power off reset of the iPod to breath life back into it. Sometimes, the signal (or command) to pause the iPod when I turn off the engine must be missed and it continues to play and drains the battery until its dead. Sometimes the whole Navi console thing resets. Once it lost its mind for about 5 minutes, could not find any satellites, etc and then it finally woke up and started working again.

So... I'm wondering if there is a firmware upgrade for the Fit.

(The iPod is the last iPod classic Apple made and has the latest firmware.)