My 2013 GLK 350 was purchased, and continues to be, serviced at MB of Hoffman. Brought the car in for scheduled service and asked Jason to also check out a low speed rumble when turning. Unfortunately I was disappointed to learn that the transfer case was failing, not an inexpensive repair. Although the car was out of warranty, Jason contacted MB who agreed that the part should not have failed with such low mileage, 43,000 miles, and covered the parts for the repair.
Thanks Jason, you and the team at MB of Hoffman provided true customer service and I will not forget it when we purchase our next vehicle.