Agreed...these aren't glued by the factory.

Perhaps the dealership saw many MLs come in with the "detached bellows" complaint, and they decided to glue them on to stifle the issue. Poor way of handling it IMHO...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car