If the wagon is at all like the sedans, the rear suspension links, especially the thrust link, have bushings that wear and cause a side to side floaty, nauseating feeling. Replacing the offending link(s) helps tremendously. If they don't appear obviously bad, might help to have a MB tech look at them.

Bob Johnston

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Bob Johnston
03 E55
Comand/Nav/Bluetooth/Ipod added
Black/black
(Oh man, this car is sooooo fast.)