2005 Mercedes-Benz SLK Preview

What's so intelligent about it? Mercedes has designed a continuously active electronic map-controlled thermostat, which

Temperature controlled and light weight, the new 3.5-liter SLK engine is a big advancement over the prior 3.2-liter SOHC version. (Photo: Mercedes-Benz Canada)

directs inner heat flow throughout the engine so that engine oil and coolant are kept at optimal temperatures.

Keeping the engine's temperature just right is especially important as its crankcase and cylinder heads are now aluminum. The weight has been reduced internally too, with new lighter connecting rods, pistons and balancer weights.

Mercedes lines the new engine's cylinders with aluminum-silicon liners said to offer "particularly low friction, distortion and weight."

Due to the aforementioned technologies, plus internal exhaust gas

SLK55 AMGs will feature the first V8 to ever be offered in the SLK-Class. (Photo: Mercedes-Benz Canada)

recirculation, secondary air injection, etc, the engine's exhaust emissions are extremely low, even to Europe's 2005 EU 4 limits.

SLK55 AMGs will feature the first V8 to ever be offered in the SLK-Class. With a new class benchmark of 360 horsepower and 375 lb-ft of torque, the lightweight roadster can reportedly achieve sub-5-second runs to 100 km/h. The SLK55 will only be available with M-B's 7-speed automatic, but at least the standard steering wheel mounted buttons will make for a more integrated driver-machine experience.