Hi everyone, I am inquiring about my brothers A3, which he bought recently everything seems ok apart from his steering wheel, it is ok in the first hour of driving but after a while the steering gets very hard, harder than non PAS cars, (normal drive & high speed) I have checked the fluid but it raises some alarm, the colour is red not green. Do you guys think this could be the problem? could it be the case that someone before us have serviced it with the wrong fluid? Or is it more serious, steering pump or the rack? car is A3 2002 tdi.