I live in the sticks and travel out to the main roads via the country lanes, ie bumpy- ish roads, when on these roads my pashenger seat rattles badley, I can even rattle it with force, I took it in under warranty and they said it was a common fault with mk2 172s on severe bumpy roads and it cannot be fixed! I have to have the tunes right up to stop myself gettin the hump.. anybody else have this prob..? p