I just picked up a 2011 E350 a few nights ago and just stopped by my audio guy to strip down my old system. He mentioned that he just did a few VIM bypass on a few of the 2010-2011 E's. He recommended Nav-TV which he said works 100% and takes only 15 minutes to install. No wire cutting.
Website gives full instructions on how to do the installation...but if you're lazy (or scared) like me.... just shoot me a PM and i'll hook you up with the shop information and pricing