Available to order in the UK from April, with deliveries beginning in the summer, the S65 Cabriolet receives the same upgraded twin-turbocharged 5.5-litre V12 as the recently introduced S65 Coupé.
Now assembled at parent company Mercedes-Benz’s factory in Mannheim rather than on site at AMG’s Affalterbach headquarters, the three-valve-per-cylinder powerplant produces 621bhp at 4800rpm along with 737lb ft between 2300 and 4300rpm.
The reserves are channelled to the rear wheels through a seven-speed automatic gearbox with three drive modes: Controlled Efficient, Sport and Manual. The car sits on standard 20in wheels shod with 285/35 tyres.
Despite carrying an extra 175kg brought on by the added bracing incorporated within its platform, Mercedes-AMG says the 2180kg S65 Cabriolet boasts the same 0-62mph time as the 2035kg S65 Coupé at 4.1sec.