Question about 2007 Mercedes-Benz ML320 CDI

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I have a 2000 ML320 and my idler pulley chattered how do i fix also my cerpertine belt is shredded. can you provide a diagrahm and or route. prob # 2 windows do not roll up,they are all stuck in the last postition before it stopped working the controll panel is completely non responsive. please help

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All the bearings on all the accessory points in the belt path are subject to seizure. The tensioner pulley and the idler are especially suspect. All the pulleys must turn easily and smoothly by hand. If there is noise, grinding or rough action, replace the item that's bad. The belt must be replaced if it's not perfect. The route is shown in your owner manual, but it goes around the outside of all the items with the exception of the fan blades and the tensioner. Thus, it goes from the alternator in to the fan, back out to the idler, over to the power steering, down to the A/C, to the tensioner, down to the crank, and back up to the fan. To put the new one on, put a 15 mm socket on the nut in the middle of the tensioner pulley, and pull it all the way down to allow the belt to pass over the pulley. The windows should not all stop at once, unless there's a blown fuse to the control panel. Do the mirrors work?

Posted on Aug 27, 2009

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