My 2008 R-350 while stopped on a rather steep incline
waiting for signal change on 2008 Mercedes-Benz R350

Car has a second or 2 delay in getting into gear following placing foot on accelerator, and has a rough bump going into gear; also have noticed a slight whine at low to medium speeds that goes away after reaching normal highway speeds....Dealership has said no computer codes for the past 3 times into dealership to check on these problems...