DETROIT MOTOR SHOW: Mercedes-AMG 53 model line debuts

Mercedes-AMG has broadened its portfolio with the unveiling of a new ‘53’ model line at the Detroit motor show.

Wedged between current ‘43’ and ‘63’ nomenclature within the AMG-derived Mercedes line-up, the 53 promises to redefine the tuning house’s repertoire by using a conventional petrol engine augmented by an electrical subsystem.

The specifics of the system are this: a 320kW/520Nm 3.0-litre turbocharged inline six paired with a 48V electric system bringing 16kW/250Nm outputs for brief periods. Peak torque is available on a band of revs spanning 1800rpm to 5800rpm, while peak power chimes in from 6100rpm.

Essentially, the drivetrain features twin turbocharging by means of a traditional exhaust gas turbocharger and an electric compressor designed to mitigate lag. A 48V electric motor eschews a traditional starter motor and alternator to power to the compressor.

Unveiled in Detroit overnight, Mercedes confirmed the 53’s first applications will be in the new CLS 53 sedan, which launches in Europe in March, plus the E 53 Coupe and E 53 Cabriolet. All three models are due to arrive in Australian showrooms in the second half of 2018.

In the 1895kg E 53 Coupe, the new driveline enables a 0-100km/h acceleration time of 4.4 seconds. For reference, the existing E 43 sedan manages the same feat in 4.7 seconds.

Combined fuel use for each of the three models is rated between 8.4-8.5L/100km on the European cycle.

Mercedes-AMG boss Tobias Moers confirmed the ‘53’ models would crown their respective line-ups, with no plan to offer the 4.0-litre twin-turbo V8 ‘63’ in either the CLS, E-Class Coupe and E-Class Cabriolet.

“With the new 53-series models we are extending our portfolio in the first step towards a hybridised future,” he said.

The 53 models are distinguished physically by a twin-blade radiator grille, re-worked front apron, AMG-specific side sill panels, rear diffuser insert with round exhaust tailpipes and requisite badging.

Australian pricing for each model will be revealed closer to local launch -- some time in fourth quarter of 2018.

motoring.com.au understands the same technology, dubbed EQ Boost, is set to find its way into other Mercedes passenger cars; chiefly, the updated C-Class passenger range due to be shown at the Geneva motor show in March.