Review: Mercedes-Benz Maybach SL 680 The Mercedes-Benz Maybach SL 680 is a bold fusion of luxury and performance, redefining what it means to drive a grand touring roadster. As the first SL model to receive the ultra-luxurious Maybach treatment, the SL 680 blends handcrafted elegance with formidable engineering. Under the hood lies a 6.0-liter twin-turbo V12 engine producing 621 horsepower and 738 lb-ft of torque. This powerhouse launches the SL 680 from 0 to 60 mph in about 3.6 seconds, all while delivering a composed, almost serene ride. Mercedes? 4MATIC+ all-wheel drive system ensures traction and control, even under aggressive looks.