Rattle from engine

[Staffsbob]

I am getting a rattle type noise from the engine when I press and release the accelerator on a 2004 2 ltr SLK that has done about 40,000 miles. It seems to be getting louder. I cannot hear it once the revs are higher Any suggestions as to what the cause may be. How urgent is it to repair or is it somethingI have to live with? Also, 'a bloke down the pub' says it was the subject of a recall!

Thanks

 

[Justin1600]

I am getting a rattle type noise from the engine when I press and release the accelerator on a 2004 2 ltr SLK that has done about 40,000 miles. It seems to be getting louder. I cannot hear it once the revs are higher Any suggestions as to what the cause may be. How urgent is it to repair or is it somethingI have to live with? Also, 'a bloke down the pub' says it was the subject of a recall!

Thanks

If you have a M111 engine then it is probably a noisey Camshaft pulley