Since the current owner has only driven it 200 miles. I would make an appointment with carson the site member to check the car over quickly. Things like axel boots for leaks and misc other common things that are far cheaper to deal with there than on the road.
He should be able to give it a pretty good look in less than an hours time. Someone spent the money to redo the front seats so the car may be not bad at all. A road breakdown just tends to be more punative and greater in cost. Plus the parts are where the car is. In my opinion the site member that mentioned that was right.
Remember also to take the free roadside assistance number with you as well. Applies to all mercedes no matter how old they are apparently. Have a good trip home. Let us know how the trip went.