anyone know which electronic module runs the mds? the bcm? does it also run the tpms?

 

For what it's worth, my '12 with 3.92 gearing will run MDS up to almost 75. After 65 any heavy throttle will turn it off, but holding steady speed will stay on solid.

The sweet spot for economy seems to be about 55. At that speed MDS stays on even with slow speed increases.

 

ya that's about what my 07 did

 

Are you judging this by the ECO light? If so that is does not mean MDS is on, just that you are driving "effecient", defined as "Eco mode equals throttle less than 20%. It has no relation to MDS directly".

I can hear mine due to after market exhaust and I know my ECO light is on but MDS is off and would never get consistant MDS crusing at 75, even with a tail wind.

 

mine is a fuel svr light. the service manager says that is the mds (i hope)

 

Same thing, I had an 09. Actually not all 09's had the light, only later builds. You can also turn it off in options of the EVIC. Even non-Hemi's with EVIC's have the light, they do not have MDS..... Vid of a 4.7, watch the ECO light come on after he lets off.

 

Besides, who cares about MDS, the question is can it do this? My old 09. I miss my tuner and transmission schedule.

 

i put on commuting miles which are basically useless miles so i need all the tricks i can get to keep the cost down

 

went to the dealer today and he uploaded a mds enhancement to my computer and the mds works great even at 75 mph on and off.