This is a great car and my second SL, the other is an 1994 SL500 and it is also a great car. the difference in eleven years is astounding. the 05 has every available option except heated steering wheel, it was a CA car. amazed at the MPG on freeway, went to Cleveland a week ago, about 100 mi with 90 on I71, the goofy thing indicated 24.6 MPG!! used the distronic, I thought that would be joke, nope, it is great touched the brake/throttle once in 90 freeway miles. speed was set at 70(this is Ohio)we have a unique way of collecting road tax here. The push in the seat is addictive, another 100 hp would not make much difference, would be interesting to see another 400 hp.
twin turbo intercooled V12, wonderful engines, V12s have perfect primary and secondary balance.
only possible complaint is a very slight turbo lag, it is not much but it is there. A blower is instantaneous but eats power to twist them