.... undecided about the presure side of the power steering hose stock jeep hosed spliced into the MB hose or cut and flare the jeep steel line with the MB fitting on it or use AN adapters and braided teflon hose...
My solution has worked for many years and miles. Ford F150 power steering box and a Dodge power steering pump on a Cummins 4bt. Bought new pressure hoses for both the Ford and Dodge pickup applications (the existing hoses were very, very tired). Test fitted both, cut them at a place where it was convenient to work on. Had my parts house crimp on male and female connectors.
This should work for you, IF the hoses are the same diameter. Gets a little trickier if one is SAE sand the other is Metric.