your best option is to have the dealer do the upgrade. That way if something goes wrong then they are responsible for correcting the problem. However, many dealers are clueless about this, and will likely not have the KeyCD that you will need if your current OS is lower then V18.2.

There are sources to download the files you need to create your own update disk, should you choose to try it on your own (I've done it dozens of times, it's not that difficult). See http://www.xoutpost.com/articles.php?...ticle&artid=88

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