i have had the same problem for 40k miles, and have been unable to figure out the cause. when i go over any repetetive jarring bumps or truck ruts, the rear of the car will bounce off track. this can be quite unsettling at highway speed, and there are a lot of rough roads around nyc's highways. the shocks and airbags seem to be functioning properly, and i believe the shocks/struts bolt right to the frame without any bushing or bearing, so that can't be a factor... it doesn't matter which tires are on the car... even brand new ones. is there anyone else who has the same feeling with the car, or perhaps knowledge of any potential wear of the bushings or bearings in the suspension that may be a factor in this problem? the dealer can't recreate the condition, and they think i'm crazy... i don't think that it is a problem with the air ride, but if i can't fix it i'm gonna be tempted to get another car... it's that annoying.
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