Took my 1998 S500 with bouncy ride. They diagnosed faulty rear shocks. I ordered to shocks per their recommendation. When the shocks arrived, they realized they ordered the wrong ones. Cost 50 dollars to return. Then i ordered the proper shocks after confirming with Zimbrick. While waiting for the shocks called for second opinion and was told the hydraulic spheres cause bouncy ride. I asked what would happen if the shocks weren't the culprit, Dave got rude and kicked me out of his store. Took car to Foreign Car's Specialist and indeed the the spheres were the issue. Saved me 1200 on parts. Never again.