I've played with LC a bunch of times on my car. It doesn't let you do it more than every few minutes. Not sure exactly how many minutes. But I tried doing it at every stop sign and it didn't work. At first I thought I wasn't doing it right, but then read in the manual it only allows you to do it every few minutes.

As far as how harsh it is on the transmission, it's brake torquing, so it's pretty hard on it. But, if you only hold the brake down briefly, for example, hold brake, floor the gas, then wait for the checkered flag and go right away, it's not too bad. Whereas, if you're at a traffic light hold it down for a long time waiting for the green light would be bad.

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2022 X5M Comp Dravit Grey/Full Silverstone
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2018 M5 Black/Full Silverstone
2015 X5M Donington Grey/Full Silverstone
2010 X5M Space Grey/Full Silverstone
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