finally I see the six cylinder sl is back in the US. I didn't know until I spotted one in a parking lot here in town. what an improvement over the 129 six. of course the euro market has had the 280 and 350 230 all along. I don't know how long the 400 has been available in the 231 in europe. now we have the 400, a 3.0 liter sl that has dual turbos and puts out 330 hp and gets 20 city and 27 hwy. good or not it will have the adaptive suspension like the 550. I just look at the repair costs if there are problems with it down the road. anyway it's about time. nice car!