My 1986 LK had a regulated temperature that surprised me. Once or twice I increased the temperature on my water heater to 150 and 160 and then selected a hot wash. I was hoping for pure hot water temperature from the heater. But no, it added warm or cold water to reduce the temperature to 140. During the winter, cold rinses had some warm water added to regulate the temperature. And the above vintage, cold water had regulated temperature. On my LK, auto meant warm wash & cold rinse. Nothing else, but also regulated temperatures.
Incidentally, the above LK was 1st generation DD LK. By 1997, the control panel and significantly different and had far more regulation.