had same issue with mine. I suspected top mounts. had top mounts, dampers and drop links replaced. been fine for 12 months but now getting the odd creak again.
i used Febi Bilstein top mounts and drop links and OEM spec Sachs dampers.
Picked the car up yesterday and, touch wood, so far all is well. I gave it a good 30 minute high rev blast to force DPF regen and the heat didn't deviate from optimum at all. Previously it definitely would have overheated from such driving. The radiator fans are also having a far easier time of it which is always good and quieter. We went with a thermostat from the main dealer in the end. Time will tell if this works long term but so far so good.