Based on the firm's SL600 convertible, it has a twin-turbocharged 6.3-litre V12 engine, giving 730bhp and peak torque of 1,320Nm. That's enough to cover 0-62mph in four seconds and 0-190mph in half a minute.
Top speed is 'limited' to 217mph. To cope with the extra performance, the suspension has been lowered by 15mm and bigger brakes and tyres fitted. A special bodykit will improve handling and stability.
Inside, the SV12 has additional carbon fibre and leather trim. Expect to pay around £200,000 to get your hands on one.