cyclensf

So, I have a E550 Cabriolet that is a 2011 built in 2010. I have the old version of the instrument panel, but have had a few loaner cars with the updated version of the instrument panel and specifically the upgraded more modern center computer screen. Has anyone upgraded theirs? How much did it cost? I have asked at my dealer, and they keep not answering the question. Thanks for any help or advice.