Idle/coasting rattle

Hi,

Recently purchased my 2011 Octavia VRS, it is DSG and petrol.

On start up in the mornings there is a really tinny type of rattle, and it doesn’t sound like it comes from the engine bay - it only lasts for about 30 seconds. Put it down to cold start.

Today I drove down a street with cars parked either side and noticed the sound was bouncing back off the cars when I let off the accelerator, but not while pressing the accelerator.

Is this a common thing anyone could pinpoint from experience? I will put a video up tomorrow but I’m just curious/paranoid.