RoyY

I accidentally messed up my navigation unit button setting so some of the buttons are mis-mapped or no longer functioning. Dealer is asking for a lot of money to replace the whole unit I thought I might as well upgrade the whole thing if possible.

My local dealer offer refurbished navigation units for about 1k. Ask them about it.

How long did you disconnect the battery? I did this twice. First time I opened up the rear compartment and took out the navigation ECU, and took it apart to do the reset, and it worked. Second time I simply disconnected the car battery for over night, and it also resetted. Bad part is, all other settings were lost as wel.