8.1. Introduction

The cruise control with braking function has been used in many BMW models since the BMW 3 Series (E9x). It is also called "Dynamic Cruise Control" (DCC) and installed in the F10 as standard. It relieves the burden on the driver on quiet roads by maintaining a constant speed regardless of the resistance to vehicle motion (gradient, payload). Despite the support offered by this and other systems, the driver invariably bears full and sole responsibility for control of the vehicle The driver can brake or accelerate at any time to override the DCC function.

DCC also offers the driver the option of adjusting the set speed in small or large increments, which is then set and maintained by the system by controlling power output and braking. The brakes are also controlled during steep downhill driving if sufficient deceleration is not achieved by engine drag-torque alone.

The cruise control with braking function is implemented in the F10 within the ICM control unit.