I have seen this topic discussed before but I am stuck on what action to take next. My car flairs ocassionally between the 2-3 shift points. It does not happen all the time but seems to occur more when colder and under certain loads. The car is Starmarked and I have had it to the dealer. vacuum seems to be okay and they adjusted the modulator. they said to continue driving and if the problem persists they will 'look at ' it again. I mentioned the spring kit Mercedes made avalaible but they intimated that it didn't work or they did not have much confidence in it as a final fix. I am wondering how prevalent this problem was on these transmissions? What has finally solved the problem for others? Is this a complete rebuild scenario? Thanks in advance.