Hi guys,
Recently i been experiencing another rattling sound near the passenger door side, the rattling is quite bad as almost everytime i accelerate the sound appears. At times it's loud, and i kept try to check where and which area of the door have loosen components but still fail to locate (handles, buttons, power window) i do notice the side cover near the air bag switch area (passenger area) have a gap but i don' think it's from there.

If it's the internal area of the door, i am in dilemma wether to have it check as affraid sc open the side cover and reassemble it i just scare it might get worst (no confident in malaysia sc work to open side door cover)

Any advice? Or anyone face this problem and might have idea where /how to fix it?
The rattling sound really drives me crazy when driving.