Mercedes in about 2005 reportedly pledged to PETA that it would make all of its models available to customers with non-leather interior. See, for example, these links:
http://www.audizine.com/forum/showthread.php/36503-So-mercedes-caves-into-PETA...
http://www.theautochannel.com/news/2005/11/03/147415.html
yes some of the models have leather interior
Mercedes-Benz has a multitude of different models, can you be more specific? A 1991 SL500 Mercedes Benz roadster?
Mercedes Benz offers a variety of models of camper vans. Some Mercedes models include the Mercedes Sprinter, Mercedes TN, Mercedes T1, Mercedes Vito, and Mercedes MB100D.
According to the EPA, the interior volume of the 2004 Mercedes-Benz SLK-Class is 53.3 cu.ft.
According to the EPA, the interior volume of the 2013 Mercedes-Benz E-Class is 111 cu.ft..
According to the EPA, the interior volume of the 2012 Mercedes-Benz SL-Class is 60.7 cu.ft..
According to the EPA, the interior volume of the 2007 Mercedes-Benz E-Class is 113.1 cu.ft..
According to the EPA, the interior volume of the 2004 Mercedes-Benz SL-Class is 68 cu.ft..
According to the EPA, the interior volume of the 2009 Mercedes-Benz SL-Class is 68.0 cu.ft..
According to the EPA, the interior volume of the 2006 Mercedes-Benz C-Class is 97.7 cu.ft..
According to the EPA, the interior volume of the 2011 Mercedes-Benz C-Class is 100.6 cu.ft..
According to the EPA, the interior volume of the 2007 Mercedes-Benz SL-Class is 57.8 cu.ft..