Our window motors are notorious for failing. I had the drivers side replaced within 3 years under warranty, and the passenger side last year - mine is an '03. I believe there is more to the reset procedure than what you did, not sure though, but that reset is pretty much for auto drop when the door is opened anyway. But when it won't come back up at all, that is generally a failing motor; it may work off and on, and may work if you bang your fist on the inside of the door. Replacement now will save future aggravation.
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I like my 350 but I love my 300ZX TT more.