Mercedes-Benz W164 transfer case chain and rattle
ML 320 CDIML 280 CDI
Mercedes-Benz W164 rattles or clatters when accelerating, could it be the transfer case chain?
Yes. The transfer case chain has no tensioner, so a stretched chain can jump and rattle under hard throttle. A loose chain guide can also roll around on the bottom of the housing and cause clattering.
What is done to a stretched Mercedes-Benz W164 transfer case chain?
The chain and guide are replaced. The chain can be replaced separately once the transfer case is removed. In the worst case a stretched chain can split the housing wall, so the noise should not be driven on for long.
What other than the chain can cause Mercedes-Benz W164 front-end rumble?
Before taking the transfer case apart, check the driveshaft joints, universal joints and support bearing rubber, since they rumble when worn. Transfer case service may not be in the service schedule, so the oils may never have been changed.
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