2006 Mercedes-Benz E-Class E350 4dr Sedan (3.5L 6cyl 7A)
Listen in the morning at start up for a whining noise. it is the oil Pump because very few mechanics change the front of the trans oil, there are two oil plug for the transmission. Mercedes will replace the oil pump even the vehicle is out of warranty because they know there is a problem . 06 and 07 E350 .