Just because something is common it doesn't mean that it is right. Baxwalker and I were the first probably the first people on here back in the day (2008) to continually harass Fiat Customer Services re the clutch noise on the 1.3MJT.
All Fiat would say was that it was a common problem, which was very true, but eventually we persevered and managed in some small way to establish a warranty claims procedure involving the fitting of a damper in the clutch hydraulic line. This cured the problem 100% and this also was caused by the fact that RHD cars had to be modified to use LHD configuration parameters.
The driver's door handle, the washer jets popping out, S&S problems and the wiring loom failing at the tailgate transfer point etc. are all common but that doesn't mean that we have to accept them.
However, unless you are lucky enough to have a switched on dealership handy you will often get fobbed off with remarks like this.
I can honestly say that on the four 500s I have had I have never had this problem and I dare say if you asked the dealership to let you try out a couple of their demonstrators the odds are that they would be noise free.
If so then you should then ask them to explain why some do it and others don't. As stated above, a recording will at least enable those on here who have this problem to confirm whether this sounds the same as on their cars but if it is due to slackness in the linkage then I personally would be very aggrieved that it cannot be fixed on a 1 week old car.