New looks, tech for Mercedes-Benz SL

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• 2015 Mercedes-Benz SL 63 AMG review
• Coming soon: The new Mercedes-Benz S-Class Cabriolet

One of the best convertibles on sale just got better.

Mercedes-Benz has revealed a series of tweaks for its premium SL-Class convertible, bringing new looks and more technology to the iconic drop-top range.

The changes are led by sportier front-end styling that takes cues from the brand's new S-Class and C-Class coupes as well as the flagship AMG GT supercar. There are reprofiled LED headlamps, dramatically flared cooling vents and new chrome touches on the bumper that lend aggression to the classy cruiser.

Tweaks to the rear are far more subtle, and there are new colours and alloy wheel options to help the new model stand out at the yacht club.

Under the bonnet, the entry-level twin-turbo V6-powered SL 400 benefits from an extra 25kW of power and 20Nm of torque to take peak outputs to 270kW and 500Nm.

The SL 500's 4.7-litre twin-turbocharged V8 now makes 335kW and 700Nm (15kW more than its predecessor).

Performance figures for the SL 63 AMG and SL 65 AMG hotrods have not changed. The SL 63's 5.5-litre V8 continues to make 430kW and 900Nm, while the heavy-hitting SL 65 pumps out 463kW and 1000Nm – figures that are unlikely to disappoint those prepared to pay up to $500,000 for the ultimate Mercedes drop-top.

Non-AMG models now feature a new nine-speed automatic transmission with dynamic driving modes that work in concert with the engine, suspension and steering. Clever tilting air suspension that leans into corners has made its way into the roadster from the S-Class Coupe, in addition to a new suspension system that does away with conventional torsion-based anti-roll bars.

Interior changes include a new infotainment system that features Apple CarPlay for iPhone users, as well as twin USB points. Internet radio and real-time traffic data services have been improved, along with revised ambient lighting, new air vents and a restyled instrument cluster capable of displaying driving data such as G-Forces and torque outputs.

More importantly, the model now features the brand's latest "Steering Pilot" and "Active Brake Assist" systems that help drivers to avoid crashes at speeds ranging from 7km/h to 200km/h. Active blind spot and lane keeping assistance are also on the menu, along with a self-parking system.

The car's folding hardtop roof can be opened at speeds up to 40km/h, making it more convenient to adjust the roof in traffic.

Mercedes has not released Australian prices or specifications for the car, which will arrive locally in 2016.