Mercedes-Benz has decided that not everyone wants the same features on their new SLK. Sure, the new Magic Sky Control retractable roof is a marquee feature for Europe and the U.S., but the same can't be said for the efficiency-enhancing ECO start-stop technology. All European roadster models will be available with start-stop, but a MBUSA spokesperson told AutoblogGreen that, "The SLK350, which will arrive in the U.S. this summer, will not have it." So, how much will this change affect overall efficiency?
There will be three European SLK models: the SLK 200 BlueEFFICIENCY, SLK 250 BlueEFFICIENCY and the SLK 350 BlueEFFICIENCY. The first two use four-cylinder engines, while the 350 uses a V6. The cleanest version (the 200) emits 142 grams of CO2 per kilometer when paired with the optional seven-speed automatic transmission. That's 38.5 miles per gallon. The 250 is right behind at 37.9 mpg, while the 350 sucks down gas at a rate of 33 mpg (these are all on the European NEDC combined cycle).
In the U.S., the SLK will launch with the 350, which uses 3.5-liter V6 good for an estimated 23 mpg from the EPA. The four-cylinder 250 follows later and should get an estimated 27 mpg (combined). Some of the difference in these numbers comes from the different testing measures, but there's no question that if Mercedes saw fit to bring start-stop to the America-bound SLKs, they'd be cleaner machines. Mercedes CEO Dieter Zetsche has said his company, "want[s] to be efficiency world champions ... and we will be," but apparently this sort of logical technology inclusion doesn't fit the company's plans.
Follow the jump for a video and two press releases (Euro and U.S.) and you can read more about the car – and that fancy Magic Sky Control – over on Autoblog.