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What ever it's doing, it is completely disengaged and the car freely rolls, definitely no clutch drag.
I went immediately to stage 3 with XHP when I got it, it's an improvement, but I'm still not satisfied. It's all software. On the M3, the US, Euro, CRT and GTS DCT tunes are all loaded from the factory, selecting those is very similar to coding features, where you select the VO of the model you want then check the tune profile you want. I'm probably oversimplifying it, but when I had it done, there was no software file loaded. This is not the case for the 135, the control module is different. That's probably why you can't select the shift harshness like you can in the M3 with six levels, level 4 and up do a nice throttle bump to rev match.
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