If you have a 450 sl badge on your car, you don't have a 5.4 liter car. You have a 4.5 liter car.. And no, you have a 3 speed automatic trans. I don't know what the final drive ratio is, but it's no where near a 1:1 ratio, or anything close to that.
The 2012 Mercedes-Benz Sprinter has a 5-speed shiftable automatic.
The 2013 Mercedes-Benz Sprinter has a 5-speed shiftable automatic.
The 2014 Mercedes-Benz Sprinter has a 7-speed shiftable automatic.
The 2010 Mercedes-Benz Sprinter has a 5-speed shiftable automatic.
The 2011 Mercedes-Benz Sprinter has a 5-speed shiftable automatic.
The maximum speed of the 1968 Mercedes Benz 250 automatic 6cyl 146hp is 217 mph.
Mercedes-Benz ATF
The 2002 Mercedes-Benz SL-Class has a 5-speed automatic.
The 2005 Mercedes-Benz CL-Class has a 7-speed shiftable automatic.
The 2010 Mercedes-Benz S-Class has a 7-speed shiftable automatic.
The 2007 Mercedes-Benz M-Class has a 7-speed shiftable automatic.
The 2010 Mercedes-Benz G-Class has a 7-speed shiftable automatic.