So,

When I'm driving on the motorway my temp gauge seems to drop 3-4 bars below 90 degrees.

Ofcourse I'm thinking that it is the thermostat, but then I find this answer (link to thread) by Porkkis that mentions that the 3-pin MFTS is affected by the wind and thereby showing wrong temperature.

So I have a couple of questions:

Looking at S2central.net it seems that the ECU uses the 2-pin water temp sensor and not the MFTS to read the coolant temperature? Then I guess I could use VAGCOM to check and see what the water temperature is? If it stays at 90 at motorway then it is not the thermostat but the MFTS that is the problem?

Second has anybody besides Porkkis tried to screen the MFTS sensor? Any suggestions or pictures?

If indeed it is the thermostat, then is there a guide that shows how to remove and refit it? Or can some tell me how much **** I need to remove to get to it?

/Jonas