Steering And Wheel Alignment - Service Information: Servotronic: Introduction

The Servotronic does not regulate the steering force support in a conventional way by using the engine speed, rather it is dependent upon the car's road speed. The Servotronic regulates the hydraulic pressure in the power-steering pump. Adaptation of the hydraulic pressure to the car's road speed has the effect of:

• High steering force support at low road speeds
• Minimum steering force support at high road speeds

This means that minimum force is required for steering force at slow road speeds. As the road speed increases the steering force support is continuously reduced. Contact to the road surface therefore becomes more direct and steering is more precise. Consequently, steering is very comfortable and maneuverability is maximized, for instance when parking and maneuvering at slow speeds.

New:  In E83 the Servotronic is integrated in its own control unit.

The Servotronic is available as special equipment (option 216).