Advanced Key
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Advanced key or keyless entry is the electronic access and authorization system which is available as an option in several cars. It was created by Mercedes-Benz in 1999.[1]
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[edit] How it works
The advanced key allows the driver to keep the car key in their pocket when unlocking and starting the automobile. The key is identified via a proximity sensor in the car door and a radio pulse generator in the key housing as soon as the driver is within approximately 1.5 metres of the vehicle. The vehicle is automatically unlocked as soon as the door handle (or trunk lid) is actuated.
The advanced key system also means that the steering is released and the ignition turned on electronically and without inserting the key in the ignition. The driver must have the key with them inside the car before the engine can be started by pressing down on the brake followed by pressing the starter button. When leaving a vehicle equipped with advanced key, it merely suffices to press the small locking button on the driver's door handle in order to lock the vehicle.
[edit] Nomenclature
Manufacturers use keyless authorization systems under different names:
- Acura: Keyless Access System
- Audi: Advanced Key
- BMW: Comfort Access
- Cadillac: Adaptive Remote Start & Keyless Access
- Hyundai: Proximity Key
- Infiniti: Infiniti Intelligent Key with Push Button Ignition
- Jaguar Cars: Smart Key System
- Lexus: SmartAccess System
- Mercedes-Benz: Keyless Go integrated into SmartKeys
- Mitsubishi Motors: FastKey
- Nissan: Intelligent Key
- Porsche: Porsche Entry & Drive System
- Toyota: Smart Key System
- Mazda: Advanced Keyless Entry & Start System
- Suzuki: SmartPass Keyless entry & starting system
- Volvo: Personal Car Communicator "PCC" and Keyless Drive
- Renault: Hands free keyless entry
- General Motors: Passive Entry Passive Start
- Ssang Yong: Smart Key System
[edit] Insurance standard
In 2005, the UK motor insurance research expert Thatcham introduced a standard for keyless entry, requiring the device to be inoperable at a distance of more than 10 cm from the vehicle. In an independent test, the Nissan Micra's system was found to be the most secure, while certain BMW and Mercedes keys failed, being theoretically capable of allowing cars to be driven away while their owners were refueling.[2] This isn't really a problem for Mercedes keys however, as the car can determine the key's location (inside, right side, left side, rear of car, or even in the trunk/boot) and act appropriately; the car will not start if the key is determined to be outside the car.