Well, I'm back. Spent a bunch of time in the truck experimenting. The tow/haul mode when engaged while eco light is on, turns it off immediately. And no matter what speed or rpm level I chose the eco light would not come on while in t/h mode. T/H off and eco back on. So if what most have been saying, eco=mds, then mds in mine seems to not function in t/h mode. Also did the -8 in drive and it also wouldn't go into ego. With the -8 I like being able to view what gear it's in as it shifts. In the t/h mode I liked how the sound of the exhaust increased at lower shifting levels. In normal "D" you have to get on it to hear the pipes.