ok, found the site.
http://www.sears.com/sr/javasr/product.do?BV_UseBVCookie=Yes&vertical=TOOL&pid=03482139000
now my question is, compared the above from sears to the one below from radio shack what features are usefule to the benz in particular that are helpful. please disregard the price. I'm only concerned about the features that are specific to our cars at the moment.
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F008%5F002%5F000&product%5Fid=22%2D812
the reason I ask is because I already have the one from radio shack listed above, but if it lacks any functions that the one from Sears offers then I'll get the one from sears as well.