I had thought I would be excited about the 2013 model, but now that the specs are out, I don't see any compelling reasons to upgrade from 2011.
I wasn't aware until today that they reduced the torque in 2012. That just seems like a downgrade. I doubt it improves range all that much when a driver is trying to drive efficiently anyway.
The trunk space is only 1 cu.ft. better.
The bigger wheels, leather, sound system, and Around View are all nice, but I'm sure that SL is going to be around $40k.
The only big thing is the 6.6kw charger, but I've come to learn that this would not impact my life much at all. If I drove a lot more, this would be compelling.
I've also found that the quick charge port is not worth a damn to me. If that was an option on the SL, I'd drop it.
Heated seats are standard on all trims? That's silly, as I would have no need for that here in SoCal. Maybe I would want it if I had leather.