![]() A special steering wheel angle sensor recognizes this steering behavior. Several years of practical research by Mercedes-Benz has revealed that drowsy drivers tend to make tiny steering errors that they frequently correct very quickly and in a characteristic manner. Steering behavior has proven to be one especially good indicator of drowsiness. But Mercedes-Benz contends that the system is more valuable at highways speeds, where drivers are more vulnerable to drowsiness. The “stop and go” of city driving makes it impossible to develop a consistent base line for that kind of driving, so the system only operates at speeds over 80 km/h. “If you drive wild to start with it will assume you’re a wild driver… It looks for deviations to a particular driving style.” “Then it determines when you, as that very unique driver, are getting tired,” noted Chris Goczan, Manager of Product Planning, Mercedes-Benz Canada. ![]() It first determines a baseline algorithm that represents your own, unique driving style. At 30,000 miles, AMG® models receive: Rear axle oil change. For an AMG® vehicle, however, this is the first major service visit. How does it determine drowsiness? Monitors continuously evaluate 72 different parameters of your driving. For most Mercedes-Benz vehicles, the 30,000 mile inspection is nearly identical to the 10,000 mile visit. If the system detects you’re becoming too drowsy to drive, the icon lights up and alarms go off. So Mercedes-Benz engineers have developed the ATTENTION ASSIST system, which is now standard on several new models, including the E-Class Coupe.Ī “coffee cup” icon just below the gauges is evidence that your vehicle is enabled with system. This process ensures an even break-in and allows new NSX owners to immediately drive the car at peak performance.Research has revealed that drowsiness is one of the most frequent causes of highway accidents. The engine is manipulated manually and via computer for the equivalent of 150 miles (241 kilometers), below 4,000 RPM and at varying engine loads (essentially, simulating driving in different types of traffic and at different speeds). The Acura NSX, on the other hand, has its break-in period completed at the factory before the car is delivered to the customer. Subaru recommends owners keep it below 4,000 RPM for the first 1,000 miles (1,609 kilometers), regardless of the car model. Chevrolet has a two-stage break-in for its famed Corvette: For the first 500 miles (804 kilometers), it suggests drivers stay below 4,000 RPM and avoid driving at full throttle. For instance, Nissan suggests its GT-R should not be driven at more than 50 percent throttle or over 3,500 RPM (revolutions per minute) for the first 300 miles (482 kilometers). That leads to "hot spots" within the engine's cylinders, which can cause problems in the years to come.Įxamples of break-in periods for specific vehicles vary, depending on the make, model and other variables. ![]() If there are imperfections in the pistons or the cylinder walls from the manufacturing process, working the engine too hard and too soon can wear down those imperfections too quickly. The goal is to get the engine's piston rings, which expand, contract and flex, to seat properly on the cylinder walls. The break-in - or mechanical run-in - period is designed to begin to wear the engine evenly and smoothly with low, consistent pressure, normal operating temperature and smoothly flowing oil. Here's why.īreaking in a new vehicle is really about the engine. But cars actually need a "break-in" period before you test them to the max. After all, you've probably been waiting a long time for the chance to call it your own. And it's tempting, to say the least, to really explore the potential of a brand new car. "Drive it like you stole it" is a common and arguably overused phrase to describe the way "real" car enthusiasts think everyone should behave behind the wheel: pushing a car to its limit at every opportunity. Subaru recommends owners of its new cars keep it below 4,000 RPM for the first 1,000 miles (1,609 kilometers), regardless of the car model.
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