I own the North American version of the LS600hL, and as has been mentioned above, LKA is not available here. Evidently, there is a conflict between LKA and the 600's LED headlights. I don't know if this has to do with output frequencies, and the radar cruise control, but apparently those two are not available in tandem. I'll say one thing about the LED lights however, the output is lower and not as crisp as it was on my previous 460, so perhaps LKA needs more light (at night?) than the 600 can put out.
I own the North American version of the LS600hL, and as has been mentioned above, LKA is not available here. Evidently, there is a conflict between LKA and the 600's LED headlights. I don't know if this has to do with output frequencies, and the radar cruise control, but apparently those two are not available in tandem. I'll say one thing about the LED lights however, the output is lower and not as crisp as it was on my previous 460, so perhaps LKA needs more light (at night?) than the 600 can put out.