Anthony,

If the leveling system isn't working, it could be due to a faulty pump. The way to tell if the spheres are bad is if the car bounces alot when going over a bump. The struts could also be bad. If the spheres are indeed at fault, you should also get a new filter and new MB hydraulic fluid ONLY! Don't use anything else!! I think about 5 litres will suffice for a complete flush. If you need help on replacing the spheres, e-mail me and I'll give you instructions. There are a few things you'll need to know.

I can also help you with the other problems. I just don't have time right now to write a long post. Gotta scoot!

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Regards,
Aaron