The fan clutch is a well known failure around 200,000 miles as well as tensiometers. Your car probaly has the updated and reinforced radiator neck as well. My water pump went about 130,000 but I think that is not the norm.
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (194,000)
1999 E300 Turbodiesel (244,000 miles, dies at 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles)
2011 Audi A4 Avant (129,000 miles) hate this car!
BMW 330 xi 6 speed manual (100,034 miles)