i have a 99 e320 4matic w/94000 miles on it love runs like a dream but i'am new to mb and the trany seems to whine a little out of 1st gear along with once in awhile a klunk or maybe not a smooth shift into 2nd. The noise or klunk is in the rear end.this is not all the time.could it be just my foot on and off the gas at the wrong time.maybe time for trany fluid change? thanks if anyone has any ideas.