[HowieZ4]

The procedure you describe is correct. Unfortunately, the workshop didn't follow this procedure the first time so there was no 2 liter void before the fill hole overflowed so the transmission was under filled. That caused all sorts of issues with the trans and DCT.

Subsequently, topping up the second time, they used a hand held pump and put in too much. So yes, they can overfill the trans oil if they don't follow the DIS oil calibration procedure.

Cheers, Howie