Thanks! I will give it a try!I have a 90 XC90 T6 and it does hold the speed going downhill here. After going a few MPH above the set speed, it starts applying the breaks. So it ends up going a few MPH higher than set. But I'm not in the Rockies here.
Other Level 2 cars I had previously would downshift to do engine breaking first before applying breaks going down hill.