Although there are no rattle in my car, I felt that some plastic panels could be designed better.
For example, the inside B pillar plastic panel could be better attached. It feels loose.
Here is my solution: Get a double sided tape and cut small strips of the size mentioned in red (see red in pic )
1) DO NOT REMOVE THE PANEL, ONLY PULL IT OUTWARDS SLIGHTLY
Pull the panel outwards slightly and slide the tape inside (double sided).
Use match stick to push the tape inside so that it is not visible. Only 4 tapes required here.
Once you are done, press the panel firmly.
Result: Better panel feel and quality, zero chance of rattle.
2) One tape at the back side of B-pillar as mentioned
DO NOT REMOVE THE PANEL, ONLY PULL IT OUTWARDS SLIGHTLY
4-5 tapes at the rear side panel. Use match stick to push the tape inside so that it is not visible.
Result: Better panel feel and quality, zero chance of rattle.