2006 A4 2.0T Just had new radiator installed after accident. Prior to the repair the temperature gauge sat rock solid on the middle marker. Now it floats between the middle marker and about 1/8 inch to the left of that and then returns to middle marker and keeps repeating this cycle. Time frame between cycles seems to differ. Is there any reason for concern here ? People who did repair really had no advice on this as it is not over heating.