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Home >> BMW >> 2012 >> 528i >> Repair and Diagnosis >> Electrical >> Gauges >> Driver Assistance Systems - Overview >> Acc Stop & Go >> 9.1. Introduction

9.1. Introduction

The optional Active Cruise Control with Stop & Go function (ACC Stop & Go) offers optimum assistance to the driver not only in smoothly flowing traffic but also in traffic jam situations.

The Active Cruise Control with Stop & Go function (option 5DF) can be ordered only in conjunction with an automatic transmission (option 205 or option 2TB).

The purpose of ACC Stop & Go is to relieve the strain on the driver, therefore, further enhancing comfort and convenience.

The connection between the ACC Stop & Go equipment and the navigation system (as on the E60) is no longer necessary as from the introduction of the F10. In the E60, the navigation data was required in order to switch off the short-range radar sensors of the ACC Stop & Go in the vicinity of radio astronomical telescope/stations. The radar waves of the new ACC Stop & Go sensors no longer disrupt function of these radio telescopes, and therefore they no longer need to be switched off in their vicinity.

Active Cruise Control with Stop & Go function is a system designed to ease the strain on the driver, but it is by no means intended as a system that can relieve the driver of the obligation to exercise due diligence at all times. The driver bears full responsibility at all times for using the system in a practical way. It is self-evident that the driver must remain fully aware of traffic conditions at all times; this system simply makes it easier for the driver to do just that.

Active Cruise Control with Stop & Go function is designed to operate from high speeds down to a complete standstill. Speed and distance from the vehicle in front are automatically controlled in this speed range.

Fig 1: Identifying F10 Active Cruise Control
G06926600Courtesy of BMW OF NORTH AMERICA, INC.

Active Cruise Control regulates speed when the road ahead is clear and switches automatically to distance control when the sensor for ACC Stop & Go detects a slower moving vehicle in the lane ahead. In this way Active Cruise Control not only assists the driver on little-used roads, but also in heavy traffic. Active Cruise Control takes over the routine of accelerating and braking for precision adjustment of distance and speed to suit other road users.

Fig 2: Identifying F10 Active Cruise Control
G06926601Courtesy of BMW OF NORTH AMERICA, INC.

The Stop & Go function of the Active Cruise Control brings the vehicle to a complete stop if necessary. If the vehicle ahead begins to move again after having stopped, the driver is notified. To pull away again, the driver has to acknowledge this message. The pulling-away process is controlled fully automatically by ACC Stop & Go only if the duration of the standstill is very short.

This way ACC Stop & Go assists the driver not only in flowing traffic, but also in traffic jam situations. However, is not suited for use in urban areas for negotiating junctions or traffic lights.

The following aspects of the ACC Stop & Go assist system are considered in more detail here:

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