Before i go to dealer to solve my problem (if it appears) i'll take off the box. But I hope nothing happens.)
I've made few run's with the guy on a same car (F30 320d xDrive) with BMW Performance Kit.
You can see that effect occurs at speeds above 100 km / h. So it really works!
That guy made also Racelogic statistics:
0-100 = 7.13s (automatic transmission - D, motion mode - sport)
0-100 = 7.18c (automatic transmission - DS, comfort, DSC - off)
0-180 = 23.69s
0-200 = 31.20s
80-180 = 18.68s
80-200 = 26.11s
In all he has done for about 6 rounds. Above shows the best results.
I note that when Racelogic showed 198 km / h on the speedometer was in the area of 207 km / h .
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Next time i'll try to get guy with chip-box to check results.