Originally Posted by 3rdRAM
I am in the same boat. This is the first Ram with a Hemi I have owned (2007 model) and have no clue if it had MDS and how to turn it on/off.
My 07 had the MDS when I bought it, It has cat-back exhaust and when the 4 cylinder mode kicked in it sounded like a 15 year old FedEx truck. I ended up buying a Superchips 3865 for the truck and disabling the MDS and love it! I'm getting between 16-17 mpg hand calculated with my mods so I am not missing the MDS. My truck also seemed to hesitate before it re-enter 8 cylinder mode which was annoying. I know the Diablo Predator programmer can also disable the MDS, and have heard dealers can flash it off of the ECU (not 100% sure of this).
It seems if you keep the stock exhaust and the MDS is working correctly most people do not mind it. It really comes down to a personal preference and mine was that I bought 8 cylinder truck and would like to use all of them.