The stuff can be bought from MB but may be $ ( there is a official MB manual site somewhere. ) However, try searching for your model car on this nation wide salvage yard inventory system car-part.com The yards probably won't list the manuals by themselves as it is a small ish part so search for major parts to find a car then call to see if they have the manual.

If you are anywhere near Brim's in Ohio, just bypass them all together, it will only make you mad dealing with them over the phone. And, I have it on good authority that they are just as bad in person, this coming from myself and another person in / close to the car biz.