With all due respect SKYLNR, your way way off!
1. The SL55 basic on the road is just under $400K
2. The SL600 is not twin turbo, the SL65 "AMG" is twin turbo
3. E55 150K? I dont think, try $240 on the road drive away no more to pay. You must be confused with the previous model. Our's is a 5.4ltr V8 Supercharged pushing 350kw & 710Nm of torque, with approx 600Nm of it available from 1500rpm. The previous model is the same 5.4 less supercharging, some other fancies about 250Nm of torque & 80Hp.
4. The current CLK55 is a similar motor as the current E55 but doesn't have the supercharger again similar to the older E55.
5. Which merc dealership do you work at???
There are only 2 mercedes AMG models available with this engine, currently they are the E55 & the SL55. Unless you have driven a benz with this motor, I cannot begin to tell how damn fast this is. There's is close to nothing that can move so fast at any speed, any gear, any moment. Also you need to remember these thing way close to 2tonne do a 0-100 in 4.5~ & a qtr mile in a low 12, carries five people comfortably & I can let the misses drive it, & be confident, she will blow just about eveything that even contemplates trying to run her.