CLK 320 Creaking thud knock noise

[alexdyer]

Hi I have a clk320 2003 which has a creaking / thud noise that i cannot pinpoint.

If i pull away from a standstill i hear a quick knock / creak noise. as if the engine is moving into position. than when I brake the same noise happens againg as if it is going back into place.
It sounds to me really like a faulth engine / gearbox mount or something similar.
Has anyone had any experience with this before?
apollogies in advance for my noise description!

Regards
Alex

 

[grober]

Other possibility is worn rear subframe or differential mountings

 

[alexdyer]

are these easy to get to?

 

[alexdyer]

the noise is from around the transmission tunnel area if that helps. more front than back.

 

[WG M-B]

I had one in on Saturday morning with a similar noise. It was horrendous!
There are supporting braces under the floor of the car. One is probably loose

 

[alexdyer]

are the supporting braces easily accessible from underneath?

 

[WG M-B]

Yes very easily