Ah ok, so it sounds like you've got options for transport. I'm a new member of the Benz club but know a few local guys that have had them for a long time. They're a lot of the reason I wanted one. I'd be sure to give it a good once, twice, and three times over on critical systems before doing any serious mileage so you're familiar with any failure or maintenance points. Other than that just be prepared for typical old car problems like hoses going bad, bushings wearing out, etc..

It took me about 3 years of diddling with my pickup to get it to the point where I'd feel safe taking it on long voyages. I've driven it on several multi-hundred mile trips now and plan to take it cross country to Moab in the future. Just keep a toolkit and replaceable items like fuel filters, some duct/gaff tape and hose clamps/zip ties with you. When I take my truck on long trips I usually put a gallon of coolant in there with me as well just in case.

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2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles