Thanks for the information. My GLK250 has 135k on the clock and I've noticed the motor mounts are getting a little worn.

Looks like It'll be more than a 1-2 hour replacement job when I decide to swap them out!

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98 Dodge-Cummins pickup (137K)
13 GLK250 (157k)
06 E320CDI (341K)
16 C300 (89K)
82 300GD Gelaendewagen (54K)