My almost 1000km i30 1.6 CRDI has developed a new rattle. It sounds as if there's a ball bearing running up/down a channel inside the center console (just where the ash tray is). The sound only occurs when I lift off the gas and when I hit the gas. It only occurs once. So if you gas-brake-gas-brake-gas-brake constantly, you can make it rattle on and off. The rattle isn't constant. It's like a ball bearing running up (due to inertia) when hitting the gas and it's a wall or edge which makes it rattle and then when lifting off the gas (car engine brakes and due to forward momentum) sounds like a ball bearing runs down and hits another wall or edge which makes it rattle.
The thing is, i have NOTHING inside the ash tray, the multi purpose box below and over the radio, only the manuals inside the glove box, nothing on any door's trash bin and a few receipts inside the center console storage bin.
Anyone know what this could be?