I do not leave the disc in unless I am going to use the NAV system as there is a lot of disc head activity going on even when not in use causing unnecessary wear.
If I have the system on, stop, turn off the engine, remove the key, and open the door there is still disc activity. Also, leaving it in during hot weather while parked out side in the sun can cause warping of the disc.
This is just my opinion and experience...
I am NOT advising or trying to tell anyone else what to do. :stirpot: :stirpot:
I have had a disk in my nav system since day 1.
Been well over three years now.
I am in Texas where summer temps are well over 100 degrees every day.
I have never had an issue with warping or excessive wear. At least not yet.
I did notice, a few weeks ago, when I FINALLY got V4 and removed V 3, the DVD was pretty dusty. I will be taking it out every few months but just to clean it.
I would be a lot more worried about it getting damaged or scratched with the constant removal and reinsertion of the disk.