This Mercedes is gone in 60 seconds. Got a fancy keyless car from Mercedes, Tesla, BMW or another brand? Check out this video, thieves steal a car within a minute. Wireless keys might have a range of maybe 4 meters before your car unlocks, but that doesn't mean the signal can't be boosted (relayed) and manipulated to open and start the car. Tip, you better store your key in a faraday cage like box if you normally keep it in your pocket.