You can always take it out and check it. You could also see if the water pump is working while the thermostat is out.

 

WHOA!! Thanks a lot guys for all of your Fantastic Replies! Mike your response made sense so all of you who thought it was the thermostat were correct, I replaced the thermostat today and now the temp sits bang on 90 Degrees C. Oil temp seems to take a bit longer to warm up but has been sitting around 1/4 of the gauge since the thermostat replacement, as described by Cragman.

This experience makes you APPRECIATE the benefits of a working thermostat, which so many people take for granted :P

Awesome.
Rick.

Edit: This is the how to I used
https://www.audiforums.com/forum/sho...d.php?t=127029

 

If the thermostat stuck closed, you'd likely overheat since the heat-soaked coolant couldn't get out to the radiator to be cooled. I'd swap out the thermostat and also do the coolant temp sensor just because it's a known issue item and causes all sorts of headaches when it craps out. It's cheap and easy - do it too.

 

Thanks for the info probly digging in this week to check it out so i'll get back and let you know how it goes.