Really good information thank you very much. I will start at the point that costs me the least and work up from there. Which will be checking tightness and re-torquing under load.

Then, if not fixed the investigation starts for real. Oh the joy... I am not going to give up though.

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BMW X5 E53 3.0 Diesel Sport | Sapphire Black Dakota Beige Leather interior | Year 2004

What I had updated
Carbon Effect Steering Wheel
Panoramic Sunroof Fix
PVC Replacement
All glowplugs and glowplug regulator
New discs and pads all round
All new front suspension links, bushes and rods