just had a gearbox put in my 230clk komp as the other gave up the ghost all of a sudden,however the replacment is not right,its is sometimes smooth in all gears apart from going in to 4th the revs seem to go slightly higher then goes into 4th not that smoothlyc,also sometimes it seems to feel like as if i riding the clutch from pull off even though its automatic,and its happened a few times that ive been driving along and as i let off the throttle to say go round a corner i put throttle back on and it acts as if its in neutral, i then pull over take it out of drive put it back in and its fine,any ideas what could be?cheers lee