We just started experiencing what feels like a problem with the lockup torque converter on our '04 C240. In upshifting into 2, 3 and 4th gear there is an abrupt, harsh jolt and sometimes when decelerating it vibrates like the TC is not disengaging....are there known problems with this model that I can steer the service advisor to (it's under warranty) or should I just let them find it on their own?

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz