It happened to me b4.. not on proton... mine even more unexpected, happen to a non drive by wire car...lol
Happen to my car also, didnt do any thing to it... i can only suspect it as wiring issue, at first thought my car kena haunted at my office parking.. lol..

It happen once awhile so very difficult to complain, can only get the wiring done when i got extra cash and time.

I think its when u drive over slightly uneven road then got sound.  Mine also got this sound recently,  I only found out its from the power window,  previously I thought its from the dashboard. The weird thing is only the driver side got this problem. What I found out is that u can do is lower the window abit after its fully closed but not to the extend of opening any gap.  Just a slight movement down will stop the sound.

Just made appointment with CoSE for next week wednesday...

was pleasantly surprised at the lady who answered...within 2 rings answered the call and nicely go through with me the timing and did explain on the booking number as well haha...

either they did improve their customer service, or she is a new staff

hi persona club members...
the aircond auto on and off i juz bring it to COSE and they change a new a/c knob the whole set 3 of them..the a/c speed control,the coldnest control and the last 1 blow control...until now dont have any problem d...they say old 1 loose d so change..