Since apparently these fans do go kaput after a while (I am at 105,000 miles) I am dithering on whether to pay £60 - £80 used and risk a future failure or how much more for a new 3rd party one.

Hi Grant, many thanks for your fast and detailed reply. Mine too is the 3.0D Sport. Anyway your answer is very helpful and I will get under the car to test solenoid wires when it is a bit warmer in a month's time and will revert then. I will be testing and probably replacing the Aux fan first, with ...

My aircon not working on 2006 E53 3.0D - have a coding error that Aircon Compressor not working and would be delighted to pursue the possibility of this simpler and much cheaper fix - can you offer any further details and how to get the replacement solenoid if indeed it is that which has gone kaput ...

I AM INTERESTED - HOW MUCH DO YOU WANT FOR THE FOB AND TELESMART RECEIVER? KIND REGARDS, ADAM