As i've recently changed over from BMW Z4 to S3 I thought I'd wait a while to see what I found as possible problems. So far, Car takes a while to heat up from cold. Temperature gauge moves up to the middle of the gauge in a further distance than the 2.5 Z4 took. Smaller engine so I thought it would be faster to heat up. The heater is not very powerful at all. It is on, clears the windows but doesn't seem as if it's vey powerful. Is this common or should I take it back to Audi?