Hi all i have recently purchased an audi a4 with the 177ps 2.0tdi manual quattro . the car seems to be running cool it struggles to reach just below 90c on the gauge even on the motorway if you turn the heating up the temp falls constantly fluctuates on A roads dependant on speed and outside temps . i have it at awesome gti on friday for a timing belt and water pump so was thinking of asking them to change the thermostat whilst the coolants is drained . is there only the one thermostat on manual cars . i have read a few posts on other sites where people are saying this is normal which i cant believe . any advice would be appreciated