okay, i'm completely new to all of this, so please forgive me if i don't call things by their right parts. i just got a 2004 gli and it drives me nuts that it doesn't have the outside temp and miles to the gallon, etc... on the dash. i guess that option wasn't available on the jetta at all. i just figured i'd get it cause my friend's older gti had it. anyway, i wanted to know how expensive and involved it would be to have the computer installed. i know it's a lot of electrical work and involves taking the dash apart, etc... i'm just curious to know if it's something i might, someday, want to have done.