W12 coolant temperature sensor G62 replacement

[maromko]

Hi All.
Good day to all of you.
Need some recommendations.
From 6 months I am happy (most of the time) to own 2004 A8 W12 engine, but as usually there needs to be time that some engine work needs to be done.
My problem is that I don't know many workshop and engine who I can trust in East Midlands.
Got one thing what needs​ to be done ASAP, that's coolant temperature sensor (G62), instruction saying, take engine out, but on USA forums few People been able to do that without taking engine out. I need to found someone in Leicester area who will try to replace that sensor for me without taking engine out (to reduce costs of replacement) I did try to do that on my driveway but I stuck - can't remove old sensor from pipe as it's stuck in pipe. Any one who knows who can help me?