First thread here, so I hope I do it right!

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In the last few thousand km's, my polo has developed a groaning sound whenever turning at low speeds (into driveways and car parks; or tight roundabouts) the sound appears to be coming from the suspension system. What I'm finding interesting is that it only happens at low speeds.

VW claim nothing is wrong, but then the dealer I go to struggles to fill engine oil without spilling it..

Any suggestions?