I have a strange noise coming from the roof region (maybe its the sunroof) everytime I start the car and drive slowly over small curbs.It is a short cracking sound which is good noticeable even with the radio on.It sound like some part is klicking out of its place.
Maybe someone has a solution for this one or know from where it comes.

 

its the rigid construction of the car that causes this, maybe someone know if this can be resolved. Mine does it everytime and if it dont i think something is wrong, LOL!

 

too much torque to the wheels =)

 

You drive over curbs in your G35?

 

its good to hear that Im not the only one with this prob.maybe someone has a solution for this

 

sunroof - couple of post on this floating around.

i have it as well and it sounds just like my wifes old 240z did with a sunroof when she had it about 10 years ago. i wouldn't worry about it.

 

Remember a thread long time ago on this.

One possible solution was: lubricate rubber seal with silicon spray.
(this worked for me for subtle cracking sound and for open/close noise)

Second possible solution was: sunroof track mounting bolt(s) not torqued to spec or one or more were loose.
(was found to be true with someone else and solved their cracking/popping noise problem under warranty)

 

The rubber seals give off more of a low squeek. The noise I think the OP was talking about is a clear and distinct "Knock" when you exit a drive way or over a speed bump on an angle.
Mine does it as well.....Just started about a year ago. I think the dealer can retorque the sunroof tracks, but It will come back again....a simple flaw in the design. Too much flexing in the roof area.

 

Yeah it is exactly the same noise like GR8TG35 explained.Thanks for all those replies.I will check my sunroof.Ill let you guys know if something worked out for me.
If not I have to live with the design flaw

 

i have the same noise here almost everytime i back out of my driveway.

 

^ lol exactly same here.

 

I think I know the noise you are talking about. I heard a poping noise (like something hitting the roof) every time I drove over an uneven grade (entering a driveway for example). I took it to my Dealer and they said its actually a part under the rear seat that makes that noise. They ordered me a part but I have yet to have time to take it to them for the install.