I know my Benzes so well I wouldn't hesitate to take any of them cross country and back any time of the year. Despite the fact two of them are actually bordering 300K miles.

Get involved with your car's maintenance, and check all the items necessary to check before any long trip. Follow the MB service checklist, and you should be OK.

Fuel filters can fail on the road, carry AAA Plus for extended towing coverage, carry a serpentine belt, adjustable wrench, set of metric sockets, good spare wheel, etc.

Really, if you've kept a careful eye, nothing will strand you with either the 617 or 603 mechanically injected diesel engines.

Most of all: KNOW YOUR BENZ!