Hi Guys,

I am new to this forum but would love a bit of independent advise. I have got a RS4 2006 and recently, I have noticed dull knocking sound which increases in speed in sync with the engine when I rev it.

It only seems to be there once the engine is hot and has been running for quite a long time.

Is this something I need to worry about? Can anybody give me any advice as to what I should apart from the obvious. It has got 55k miles on it and has a full service history from Audi.

I look forward to your responses.

Thanks in advance,