Why does the suspension on my BMW 7 Series creak so much?

My 2011 BMW730d suspension creaks and groans a lot, but the main dealer cannot find any cause. Any idea what could be causing it?

Asked on 21 November 2016 by Duncan wright

Answered by Honest John
Inevitably bushes, but finding which ones could be a long and expensive business. One way would be to spray each bush in turn with WD40 until the creaks stopped and identify the failing bush that way.
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