ABC System
MB now recommend that the oil is filtered and reused rather than replacing it.
The old type oil filter for the ABC system was 10microns, the new one is 3 microns. I would replace the filter with the newer type, but I wouldn't worry about doing anything else to the system (changing oil, etc).
Many people don't even realise there is a filter. It is located in the ABC oil bottle. Take the cap/return line fitting off and you will see it attached to the underside of the cap.
It can be easily done yourself.
If there is any reason to perform any work on the system then I would change the filter.



