2007 E350 4Matic Sport Packge; P2; Pano Roof
Good day members. I own a 2007 E350 Sport with P1 and 143,000 miles. The car is still strong and running very well. Recently I am noticing a whine from the engine. Listening as best as possible it seems to be coming from the water pump. The antifreeze fluid is about a year old and tests as normal with good color and temperature tests. If I am hearing the first signs of needing a water pump, is this s DIY project and what costs am I looking at?