My current assumption:
The Mercedes Me binding is now an official part of openHAB. Especially the members who installed the Marketplace binding before are facing suspicious errors, after update to new Milestone. Root cause seems to be conflicting bundle versions between Marketplace installation and Milestone release.
As said this is an assumption but it matches with a parallel discussion of conflicting bindings.
Please check via this thread if you
a) have 2 times a mercedes bundle with different version and
b) if you can resolve this conflict with the below description