got a 110bhp tdi Leon.
it has got problems with the electrics, eg. when the cars filling up with water during the winter months I get the disco lights dash with beeping until I turn the ignition on, and sometimes it gets into a position where the both cooling fans runs continuous.
anyway I have disconnected both cooling fans and still have the same problem.
I start off to work and the coolant slowly gets upto warm and I get some heat out of the heater. if I then slow down to town speeds the coolant temp drops and eventually I end up with cold air blowing on my legs.
this morning the only way to keep it at 90 was to turn the heater off, it has climate control so had to turn the fan to minimum. I got out and felt the rad hoses top one was warm bottom one was cold near the rad but warmer close to the stat.