Our MKC with the 2.3 engine has been giving off a droning sort of sound when mildly accelerating and decelerating, usually in the 2500 rpm range, although sometimes in the lower rpm ranges. It sounds like it's coming from underneath the car around where an automatic shifter column would be located if it did not have the push button shifter. Of course when I took the service manager out for a ride, it didn't happen as it does appear to come and go. The car now has about 8,000 km or 5000 miles. The shifter buttons have been re-arranged being an early production model and it's been in for servicing the front seat heaters as per the recent TSB on two separate occasions for a total of 5 days and still not rectified. We moved over from BMW to Lincoln....we may have made a mistake. Would like to hear if anybody has had a similar problem with the droning noise. I note that there is another thread that details a more clicking or harsh noise but I think we're dealing with something different. All comments appreciated.