2011 Mercedes-Benz CL63 AMG and CL65 AMG – Active and Passive Safety

Words John Clark | July 29, 2010
Mercedes-Benz CL63 AMG and CL65 AMG Active and passive safety is a unique combination of driver-assistance systems
Words John Clark July 29, 2010

The large-scale Mercedes coupé has always been synonymous with the ultimate in active and passive safety systems. A significant part of such systems is also made up of the unique combination of trend-setting camera and radar-based driver assistance systems. The latest innovations are called Active Lane Keeping Assist and Active Blind Spot Assist, both of which are available as optional extras.

The combination of state-of-the-art assistance and protection systems turn the AMG CL-Class into an “intelligent” partner which is able to “see”, “feel”, to respond “instinctively” to detected dangers and to act “on its own initiative” in order to avoid accidents or to reduce the severity of accidents. The vehicle makes use of cameras which look far ahead, observe the conditions around the vehicle, and are able to interpret typical critical situations.

Like the Mercedes-Benz S-Class, the CL 63 AMG is now also available with the new Active Lane Keeping Assist. When the driver unintentionally drives over a solid line to the right or left of a lane or on the outside of a bend, the Active Lane Keeping Assist intervenes and prevents the vehicle from unintentionally leaving the lane. In such cases it applies the brakes to the wheels on the opposite side of the vehicle, using the sensor system of the Electronic Stability Program ESP®.

Similarly, when the new Active Blind Spot Assist system detects that changing lanes would be dangerous, it the driver by displaying a red warning in the glass of the relevant exterior mirror. If the driver ignores the warning signal and a vehicle in an adjacent lane comes too close, the ESP® takes corrective action by applying the brakes to the wheels on the opposite side of the vehicle.

Night View Assist Plus and Speed Limit Assist

The enhanced Night View Assist Plus with infrared camera (optional extra) is now equipped with special pedestrian detection: as soon as the system detects pedestrians on the road ahead, they are highlighted on the display to make them more readily noticeable for the driver. The images supplied by the windscreen camera are also used by the Speed Limit Assist, which is available as an optional extra. It recognises speed limit signs in passing and shows the relevant speed limit in the central display.

Adaptive Highbeam Assist is now also included as part of the standard equipment specifications. The camera-based system can detect vehicles with their lights on which are travelling towards or ahead of the car in which the system is fitted and controls the headlamps such as to ensure the largest possible range without dazzling other drivers.

Drowsiness detection on the basis of more than 70 parameters

Thanks to innovative technology the CL-Class has a very sensitive antenna for the attention level of its driver, and can warn him in time when he becomes drowsy.

The ATTENTION ASSIST drowsiness detection system, well-known from the S-Class, continuously monitors more than 70 different parameters. Once the evaluation

electronics recognise the steering behaviour pattern that typically indicates the onset of drowsiness on the basis of information from the highly sensitive steering angle sensor, a warning signal is sounded and “ATTENTION ASSIST. Break!” appears in the instrument cluster. ATTENTION ASSIST is fitted as standard.

“Electronic crumple zone” for maximum occupant protection

Mercedes-Benz has also improved the long and medium-range radar used by the optional Brake Assist BAS PLUS and DISTRONIC PLUS proximity control. Mercedes-Benz also offers another radar-based system for the CL-Class in the form of PRE-SAFE® Brake. If the driver is distracted and fails to recognise the immediate danger of a rear-end collision, or the warning signals of an assistance system, this system can intervene and brake the vehicle independently. The CL-Class makes use of the latest development stage of this safety system: if the driver fails to react even after automatic partial braking action, the PRE-SAFE® Brake activates the maximum braking pressure around 0.6 seconds before what is now recognised as an unavoidable accident – an emergency braking action that can significantly mitigate the severity of the impact. The PRE-SAFE® Brake therefore acts as something like an “electronic crumple zone”.