the clutchcilinder on the clutchhousing of my mercedes A-170CDI has to be replaced because of a failure (leaking oil) my garage technician tells me that for this repair he has to remove the hole drive unit out of the car, because the cilinder has to be replaced from the inside off the clutchhousing, therefore the clutchhousing has to be removed also. is there anybody that can tell me if this is right, it seems odd to me.