looking at mercedes c-300 2008

i am looking at a mercedes-benz c300 2008 with 63,000 miles on it. its from a dealership i was just wanting to know a little bit more about the car and if it is a good investment or if i should go with something else more worth the money? i don't know the exact payments yet, the bank is getting back to me soon. mechanic wise i was wondering if this car can last me awhile or if i should look for something else