Before I take the ML to shop for my dead driver side window, would like to know if there is any suggestion where I can check out first. My wife told me the dirver window was going up and down really slow in the last few days. When I looked at it, the window acted like there was not enough power for it to operate. Today, the window opened all the way but would not come back up. What should I do? Will a bad fuse take days to finally die? Maybe the motor conked out on me? Do anyone know how much approximately it will cost to fix it if I take it to the dealer? Any help will be appreciated.

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95 R129
04 Infiniti G35.5 BS
10 X204