Hi, my 1.9 tdi a4 b6 shakes from side to side....as if someones outside pushing it from side to side but only when i press the clutch at tickover. When i release the clutch the shaking stops. It also has a slight rattling sound from the engine when it starts up in the morning (more than the normal diesel noise)....it's as if something metal is loose in the engine, but when it's warm it doesn't do it. It drives fine, no clutch judder or slip. I can feel a slight vibration through the accelerator though. Any help please? Thanks