Science and fact
The 200/300Tdi motors came with a mechanical fan and a 190 degree thermostat. They work and don't need to be changed.
If a vehicle is running hot it is a mechanical issue and an electric fan is a band-aid as is Wetter Water.
A temp difference on a non ECU engine of 5 degrees isn't going to effect its performance, fuel economy or anything else for that matter.
Under load while moving slowly (off-roading, local towing, etc) the extra 5 degree margin gets coolant flowing that much sooner so the entire mass of the engine, starting to shed heat sooner.
If I recall you once posted on the other forum that you had a Ford Taurus fan that would cool so fast that you could see the temp gauge needle move the second it came on. People hopped on your ass about that bit of "science".
As for your "asshole" comment, we don't name call here. We are all expected to act like adults.