Magic Body Control is a Mercedes-Benz suspension system, introduced on the W222 S-Class in 2013, that uses a stereo camera behind the windshield to scan the road surface ahead. When it detects a bump or dip, the active suspension prepares each wheel in advance, so the car’s body stays calm instead of reacting after the wheel hits the imperfection. It was one of the first production systems to make a suspension predictive rather than reactive, and its ideas live on in today’s E-Active Body Control.

At a glance

Introduced 2013, Mercedes-Benz S-Class (W222)
Key sensor Stereo camera (“Road Surface Scan”)
Actuation Hydraulic Active Body Control
Best conditions Daylight, good visibility, moderate speeds
Successor E-Active Body Control (48-volt)

How it works

  1. The stereo camera measures the road surface ahead, detecting height changes.
  2. The control unit calculates when each wheel will reach the imperfection.
  3. Active hydraulic struts adjust each corner so the wheel can follow the bump while the body stays level.

The effect is like a skier bending their knees before a mogul: the wheels move, the body barely does.

Limits

Cameras need to see the road clearly, so the road-scanning function works best in daylight and at moderate speeds, and it cannot help with bumps it cannot see, such as those hidden by standing water or darkness. At other times, the suspension still works as a highly capable active system.

The Curve function

Mercedes added a Curve function that leans the car slightly into corners, like a motorcyclist, reducing the sideways force passengers feel. For rear passengers reading or working, it makes cornering noticeably calmer.

E-Active Body Control

The next generation, E-Active Body Control, uses a 48-volt electrical system to control each wheel’s spring and damping forces. On the current S-Class it also enables Pre-Safe Impulse Side, which can raise the car’s body just before a side collision. Read the W223 S-Class.

Other predictive systems

Similar ideas appear in the Rolls-Royce “Magic Carpet Ride” and Planar suspension, Audi’s predictive active suspension, and GM systems that use map and sensor data. Read air suspension explained.