[T5 TDI]

110 degrees is right at the top of the 'normal' range and you would certainly expect the cooling fan to be on at that point but it would normally take something like a very hot day and then being suddenly stuck in motorway traffic after a fast run/hills/towing to produce that. It's not something sustainable long term.

It sounds to me like the G62 coolant sensor is reporting high and therefore keeping the fans on. I know you did say that the temp sensor had been replaced but do you have any record of the full part number of the the sensor? Not sure how it is on the 2.0 engines but there will usually be two sensors on modern VW's. The G62 and the G83. If they replaced the G83, that reports the much cooler radiator outlet temperature and won't be the sensor that is showing your 110 degrees via OBD11/EOBD. So they could have simply replaced the wrong one.

 

[T5 TDI]

I don't usually take things posted online too personally, and although it was kind of Triffic to take slight umbrage on my account, I did qualify that statement as you mentioned. Starting a whole new thread was a bit unnecessary though..

Having a look around on the web I can't see any evidence that there are any other coolant sensors other than the standard two. Although the 2.0 cooling system is quite sophisticated. To confirm what is really going on with yours if you can get access to VCDS you could watch and make a log (record) of both coolant sensors live from cold. I did this with mine the other day and made a graph of the two sensors during warming up.