I currently have a minor annoyance with the Audi - after my 25 mile highway commute I park the car in the garage and 3-5 minutes later the auxiliary cooling fan will turn on at high speed. This is something that just recently started happening. I have the standard 87C thermostat, but via VCDS the operating temp of the engine while on the highway is 102C. Far higher than I expected. The dash temp gauge doesn't ever move from its "normal" position, so the car is not overheating per se. The thermo switch that operates the fan kicks on low at 105C and high at 107C. I've converted over to a Dexcool clone all makes coolant from the G12, but this behavior did not coincide with the coolant change. I did remove the after-run coolant pump as it sprung a leak again, and replaced with just a section of coolant hose. This pump's job was to circulate coolant through the turbos after shutdown if they were above a certain temp, but in the 6+ years I've owned the car it has never turned on. Any theories as to why the car's running at a higher temp now, as it didn't do this in the previous 5 years?