The 500/600 cars use a rear hydraulic self-leveling suspension (SLS) described as simple nitrogen-sphere damping without electronics, while the S600 adds the more complex Adaptive Damping System (ADS) that owners credit with transforming the drive. Across the range the car's ~5,000 lb mass wears ball joints and suspension bushings quickly, making front-end condition a key inspection item.
Suspension: SLS self-leveling, 600 ADS, and fast-wearing bushings
Mercedes-Benz S-Class (W140) · mechanical