What does the 'a' in Mercedes-Benz stand for?

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Mercedes-Benz's 'a' stands for the Brake Assist System. How the Brake Assist System works: When the car needs to make a temporary stop while driving, pressing this button will automatically apply the brakes to stop the vehicle, and releasing the brake pedal will prevent the car from rolling. When it's time to start driving again, simply lightly press the accelerator to release the brake and continue driving. The Brake Assist System needs to be manually turned on or off. Advantages of the Brake Assist System: The biggest advantage of the automatic start-stop system is fuel savings. Under normal circumstances, the fuel-saving rate of the automatic start-stop system can reach 5% to 15%. The larger the engine displacement and the more congested the road, the more obvious the fuel-saving effect.