Passenger window stuck down

SOURCE: My Driver's Side Window Won't Go Down

it could be the motor or the window switch, go ask a stereo shop if the can test your switch or to see if there is power going to the window motor

SOURCE: How to remove jammed cd infiniti g35 coupe

This is a stereo we see in shop for repair on a regular basis, see www.carstereohelp.com for repair. However, I have one suggestion before thinking of repair. Disconnect one of the main car battery terminals for several minutes. This is much easier then removing and reinstalling the stereo in this car. This may act as a reset and bring the changer back. Otherwise, repair is needed.

SOURCE: how to remove factory 05 g35 coupe 6sp

The stock radio system is three pieces. You have the outer display, behind that is the audio circuit board, and behind that is the actual radio, which looks like a plain square silver box. The shifter knob should have a piece on the bottom that snaps in. That piece slides down and there is a gold cotter pin that holds the shifter knob on. Remove the cotter pin with a small screwdriver and the knob will lift off. In order to remove the radio you have to remove the shifter knob, the console trim in front of the arm rest, and the radio trim should just unsnap and come out. If you are wanting to install a aftermarket radio, I would consult with a car audio store as to what is involved with this installation, because you are likely to get in over your head. 

SOURCE: change belts on g35

Here is a DIY (Do It Yourself)

http://forums.nicoclub.com/zerothread/342311

Loosen the bottom 2 bolts that loosen the belts, take off both belts, put new belts on, tighten the belts to specifications. Done.

SOURCE: how to change front driver side 2004 g35 coupe marker light

Just pop out the side marker from where the marker meets the fender well and push outward on the side marker. It has a metal clip retaining it to the bumper.

This entry was in January, most likely you figured it out already.