Chafing Noise

Hi to all. We have just bought a D3 Auto in what we think is great condition and hope to be part of the LZ forum.
However when driving it we hear a very low chafing noise but only when accelerating. Come off the gas and it stops.
Its not a loud noise but just want to be sure its nothing developing and want it sorted.
Do I take it in for a check ? Or is this a known thing ?

Hello try reposting this in the discovery section more people look there.