Transmission Driver-adaptive electronic 7-speed automatic. Driver-adaptive programming adjusts shift points to the driver's current driving style. Touch Shift allows driver to manually downshift and allow upshifts by nudging the shift lever left or right from the Drive position. Shift into Optimum Gear programming allows one-touch selection of the best gear for maximum acceleration or engine braking by holding the shift lever to the left of Drive for one second. Driver-selectable Comfort mode starts vehicle moving in 2nd gear or a 2nd Reverse gear, and upshifts at lower rpm, to help improve control on slippery surfaces.

Drive configuration Rear-wheel drive.

Rear axle ratio 2.65:1 

Turbo-powered times two. The engine in the SL600 is a biturbo V-12, wielding 510 horsepower and a staggering 612 lb-ft of torque — meaning this is a roadster that bolts to 60 mph in just 4.4 seconds.¹ Massive new 18-inch 10-twin-spoke wheels and a split dual chrome exhaust declare this vehicle's bold intentions. And inside, experience the pleasures of heated and active ventilated 12-way multicontour power seats for comfort in all weather conditions.

Engine 5,513-cc intercooled biturbo SOHC 36-valve 60° V-12. Die-cast aluminum alloy cylinder block. Aluminum alloy die-cast magnesium cylinder heads.

Fuel and ignition system ME 2.7.1 engine management. Integrated sequential multipoint fuel injection and phased twin-spark ignition includes individual cylinder control of fuel spray, spark timing and phase, and antiknock. Electronic throttle. Two high-energy ignition coils and two spark plugs per cylinder, with 60,000-mile spark plug intervals.

Intake system Biturbochargers (one per cylinder bank, integrated in exhaust manifolds) with liquid-to-air intercoolers.