Noises from rear - is this normal?

[bmwak]

Hi Guys.

I seem to be getting kind of fuel tank sloshing noises at parking speeds or braking but seems louder than normal. I sometimes also get a wierd one off knocking noise from the front or back. It is a 640d GC. Has anyone else noticed this with theirs. Should I worry about it? Its only done 19,000 miles and everything underneath (bushes e.t.c.) seem perfect with no play.

[325_bucks]

Yes! I also get the weird one off knocking, especially when moving from parking, or driving over kerbs where the car might be at an angle or something. Its been in twice and they can't replicate it and it's driving me crazy!