sharkcohen wrote:The ECO light on the dash will still come on. That doesn't mean MDS has engaged.

i know, but i can hear it and feel it.......

it dosn't come on at all while in cruise, not even the light on the dash.

with an aftermarket exhaust it is quite obvious when MDS is engaged.

sharkcohen wrote:What makes you say that MDS isn't off?

because the dash is telling me, i can feel it, i can hear it....

it;s like it has been 'turned down' , it doesnt come on at all in cruise, but still comes on in the city.

Just did a 1200km (thats 750 miles in American) road trip with the 93 octane tune/raised shift points/5% throttle boost and MDS off (sort of)

Very impressed, neglible difference in fuel economy, goes much better and on cruise you wouldn't know it wasn't stock.
Exactly what I was after.
From 110 t0 ...

Successfully installed 93 octane tune in 2013 300 srt8 Australian model.

MDS is off and all adjustments working, thanks Mike...