MB suggests it is lifetime fill and from your info that obviously means 100k. If throwing a new trans in at the end of its 100k life suits you; then treat it that way.

If on the other hand, you don't consider it disposable, I would suggest you service it as you would other precious machinery.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician