Self Study Program 275 – The Phaeton Air Suspension with Controlled Damping

VAG SSP 275. A running gear design of this type is being used for the first time by Volkswagen in the Phaeton. The system is described in this Self-Study Programme. Contact between the road and the vehicle is established by the components of the  suspension system. Requirements for maximum comfort for vehicle occupants, optimum driving safety and minimum noise transmission from the road to the vehicle interior place heavy demands on the suspension system’s designers.

Vehicles expected to meet high standards of comfort therefore represent a special challenge which entails reaching a compromise between the various requirements on the suspension system.

One solution is a controlled running gear comprising …

  • a full load-bearing self-levelling suspension system 4 – Corner Air Suspension (4CL) in combination with
  • Continuous Damping Control (CDC)

Control takes place based on the “skyhook control strategy”.


  • Basics of spring/damper system
  • Basics of air suspension
  • Basics of damping system
  • System description
  • Design and function
  • Self-diagnosis
  • Test your knowledge

This Self-Study Programme explains the design and function of new developments!
The contents will not be updated. Please refer to the relevant Service Literature for up-to-date inspection, adjustment and repair instructions.

Language: English
Format: PDF
Pages: 68

Self Study Program 275 – The Phaeton Air Suspension with Controlled Damping Design and Function PDF free online