I'm two weeks into my 2015 MKC Reserve 2.0 and love it. The ride is especially quite in Comfort mode. However, I've noticed a little hesitation or vibration when I get up to 60mph. The car has 28K miles. I'm not sure if the tires need re-balancing or if something else is going on. I thought I check the forum before I take it back to the dealer. Has anybody else experience something similar ?? Thanks !