Had my springs done with an alignmentlast last month. 30K Service scheduled for Tuesday. Can get a SUM cal as part of service only if "I have a complaint". I'm going to pay for it if I can't come up with a reason (see below).<p>What are some of the "issues" that I could complain about that would justify the calibration under warranty?<p>Also, re TME springs: Went on my first long drive, and they seem schizophenic. On smooth roadway, the car is markedly tighter and improved in any setting. But when the road is imperfect, I have to change the C4 setting to compensate for the type of irregularities: 'Advanced' is too hard if the road is pockmarked while 'comfort' was acceptable. When I hit a patch with undulations rather than pavement breaks in 'comfort', the car would float on the down and smoosh on itself at the bottom, springing back during the next up to float even more at the next top. On this type of road, "advanced" was better.<p>As a result, though, I was constantly swithching. Would have been fun if I had steering wheel mounted 4C buttons, but got irritating. Can only think what my wife would have done to me if she were driving <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0"> While she loves sports cars, she isn't the sort to charitably tolerate this type of extra effort to a task that is supposed to be "point and steer". And I can't blame her.<p>The question (finally): Might the SUM cal quiet this down? Could it be that the lowering of the suspension loads the shocks in a way that the suspension performs better once the system is calibrated?