It sounds like you may have a blown shock. Look under that side and look at the shock and see if you can see evidence of fluid leaking or that has leaked from the shock. This will cause serious wear on the other suspension parts and your tires. Plus as you well know make it hard to control the car.
You also have leveling control so look really good at all electrical wires, hoses etc for damage.
Look at your stabilizer bushings. They may be damaged or missing or torn.
Many times front end/alignment shops will give you a free estimate. My recommendation is if you don't see anything then take it to a couple of shops and get their estimate and then let us know what they said (verse what you saw) and the estimate.
September, 14, 2009 AT 7:16 PM
Also, it looks like you may have some recalls on your vehicle. The dealer may fix these for free. Please contact the dealer service department, give them the VIN number of your car and have them check on these to see if they apply to you.