Tiptronic issues

[Stl-986]

Your first warning was the low fluid. Why was it 1qt low? That is a lot.

I would have it drained, new filter, gasket and filled....correctly. Check for debris in the fluid including metal. Fluid level is very sensitive in these and if not done correctly by temp it can be over filled....which will lead to issues.

You also need to get the tiptronic codes read. You can't do this with a generic OBD reader or Torque. Durametric can read the tiptronic codes. Depending on the tiptronic codes replace anything necessary during the filter change.

I would also have your mechanic check for vacuum leaks. Your next clue is that it starts up again after about 100 miles. There is a change over valve that opens/closes for the trans cooler, which is activated by vacuum. If this or the valve isn't working it can lead to issues.

After the fluid change have the mechanic reset the adaptions. Take it for a very easy drive around town. Dont accelerate hard or push it. Just let it start to re-learn.