http://answers.yahoo.com/question/index?qid=20060713214643AAChRBf
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E- The E stood for Einspritzung, which is German for fuel injection, which was a very new feature at the time the "E" first appeared in the 1950s
SL;- SL-Class is a series of luxury automobiles. SL, meaning "Sport Light", or in German, Sport Leicht,
C-coupe
E-The E stood for Einspritzung, which is German for fuel injection, which was a very new feature at the time the "E" first appeared in the 1950s
M-Mid-size SUV
Now this is from a site
Another Aside: What do the Model Letters Mean?
Mercedes assigns the letter designation to a model to describe one or more of a car's major characteristics in a general way. Some model letters on older cars from the 1920's and 30's were:
"K" Kurz (German for Short)
"L" Lang (Long)
"V" Vor (Front, engine in front)
"H" Heck (Rear, engine in Rear)
Model letter designations on modern cars usually mean:
"K" Kompressor
"C" Coupe
"S" Sedan
"E" Einspritzer (fuel injection)
"G" Gelaendewagen (off-road vehicle) or Grand
"D" Diesel
"T" Turbo or Tourer
"S" Sport
"L" Leicht (Light weight)
Mercedes now markets cars according to Class designation. Some Classes are "S", "E", "C", and "M". These Class letters do not appear to have any particular meaning. Hope this helps!
Also
http://www.panix.com/~rmadison/mercedes.shtml
Dave