I have a base R/T I am the 2nd owner so the MDS was on when I bout it then I sut it off,but the car always had a minor stumble,I never thought anything, but then had the timing chain done,as per recall notice took 3 days , and the car has alot more snap,and the stumble is gone, how ever they nicked the radiator,so they had to replace that,cool I have a new radiator at 67k mile, then the car over heated yesterday, loosing coolant and the car has been flawless the for 4 years,so I assumed it was something they did, and sure enough the fan was not working,after the car cooled down,I found the fan was not plugged in,plugged it in ,topped it off with water, got home ,took it back to the dealer they flushed it out, and made things right, man they kinda took it in the shorts ,but they stuck by their work and all is good car runs great,and it is over