So I got a coolant leak somewhere. Unlikely the Aux water pump as that was replace recently and the coolant temp sensor is looking fine and it was replaced recently as well. I hope it was just a hose that came off or something simple. In any case, I need to get my thermostat replaced (it's stuck open 75% of the time) so this might be the sign to get it done. Which also means I should replace the timing belt. Let's not forget the rear brake pads are in need of replacing (hope there is enough rotor left). Anyone got a credit card or two I could borrow? ;)
For the time being, the S4 is staying in the garage for a week or so since I don't have the $$$ for parts to fix it.