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 2014 Mercedes-Benz CLS-Class is 92.0 cu.ft..
According to the EPA, the interior volume of the 2011 Mercedes-Benz S-Class is 125.0 cu.ft..
According to the EPA, the interior volume of the 2014 Mercedes-Benz CL-Class is 105.0 cu.ft..
According to the EPA, the interior volume of the 2012 Mercedes-Benz C-Class is 100.6 cu.ft..
According to the EPA, the interior volume of the 2008 Mercedes-Benz C-Class is 100.6 cu.ft..
According to the EPA, the interior volume of the 2011 Mercedes-Benz SL-Class is 57.8 cu.ft..
According to the EPA, the interior volume of the 2004 Mercedes-Benz E-Class is 113.4 cu.ft..
According to the EPA, the interior volume of the 2009 Mercedes-Benz S-Class is 125.7 cu.ft..