Guys, I HAVE A 1.9TDI 130NHP 2004 and the temp guage usually sits at 90 degs. Now it only sits at 90 if on the motorway. if I stop and idle it drops to 60 and the heater blows cold. I have changed the thermostat but no change. the pre fuel heater sited under the nsr pass seat has also stopped working. I usually gey a turbine noise from it for a couple of mins after stopped but now nothing. I dont know if this also heats up the coolant. can any body shed any light on this thanks gordon