Hi all.

As an owner of Superb II 2008 2.0 tdi cbbb 125kw, last summer I discovered an occasional issue with cooling performances.

During longer period of driving under load (higher rpms and faster driving for certain period of time, especially with ac on), I noticed that coolant temperature starts rising exponentially. I am not talking about sitting at 4k rpm for hours, but simple bit of harder and faster driving uphill for 5-10km, at 2.5k-3k rpm.

It never got to the point of overheating since I've always noticed temperature rising and immediately slowed down. After easing off the throttle, temperature goes back to normal with no further issues.

Only once has it happened that my coolant has "dissapeared" after this happening, but other than that, no issues in driving whatsoever, nor any overheating in normal driving conditions.

I do notice a slight coolant level drop in my expansion tank, but its nothing significant (no leaks, it goes from max to min within month, but no warning light).

These could be 2 separate issues, but I'm really interested in the first one if anyone has an idea of potential problem.

Recently did a few VCDS scans and here are the main issues, which I assume are related to this:
3 Faults Found:

006481 - Radiator Fan 2 (V177)

P1951 - 000 - Movement Restricted / Jammed - Intermittent

006472 - Control Module 2 for Cooling Fan

P1948 - 000 - Output Short Circuit - Intermittent

006480 - Radiator Fan (V7)

P1950 - 000 - Movement Restricted / Jammed - Intermittent

If anyone has any idea it would be really helpful.