Sometimes it's down to luck. My 63 plate
MK3 Leon rattled everywhere. Engine rattled at low speed (2.0TDI), a pillar did, fixed then, then realised so did the instrument binicle, that had a quieter rattle, so didn't hear initially. Then finally the door rattle, hence if there was any bass music, it vibrate and drove me nuts! I visited the dealer twice, to fix these 3 rattles, for the door, then stripped both door cards, they added some expanding foam noodle things, and it was silent, and the music sounded better. This was the Leon, my Mk5 facelift 66 plate
Ibiza 1.0TSI, nothing rattled, unless going over cobbled streets or any road inperfection (it had 40 profile 17 inch tyres), then the entire car would shudder including the driver! But nothing rattles. Currently have a Volvo V40, and this one nothing rattles or shudders (55 profile tyre
help) at all! Next up would be an 21 plate A3, fingers cross, nothing rattles there!