Such do-it-yourself jobs are more convenient because Mercedes moved Handy owners, however, can avoid buying steeply marked-up fluid from dealers and refill on their own at much less expense and without labor charges. Each gallon of solution is good for about 1,500 miles, and Mercedes recommends topping off during regular 10,000-mile service visits. thought of that, too, and it has required models to shut themselves down after a certain number of starts if owners ignore low-fluid Nor can owners simply keep driving their diesel after the juice runs dry: the E.P.A. That included $241 for 7.5 gallons of solution, which worked out to $32 a gallon. Consumer Reports received an eye-popping $317 dealership bill to refill a Mercedes GL-Class withĪbout 16,500 miles on the odometer. Fluid vaporizes into carbon dioxide and ammonia, which enters a catalytic converter to turn smog-forming nitrogen oxides, a bane of diesel engines, into harmlessīut fans of diesel powertrains have complained on Internet forums about high prices for replacing the urea solution. The solution isĪutomatically injected into the hot exhaust stream. Like other larger turbodiesels in America, the ML must carry a large onboard tank of urea crystals in mineralized water, in a solution typically branded as AdBlue or DEF, for Diesel Emissions Fluid. And with dealers marking up this pollution-fighting liquid like champagne on New Year’s Eve, refills can cost owners $200 or even $300, wiping out a chunk of the Periodic fill-ups of another precious fluid. That said, Mercedes’s diesel S.U.V.’s require The midsize sport utility vehicle from Mercedes-Benz.Īccording to the Environmental Protection Agency, buyers who choose the Bluetec 4Matic over the gasoline V-6 version of the M元50 will save $450 a year in fuel. Mercedes-Benz USA 2012 Mercedes-Benz M元50 Bluetec 4Matic.įor Sunday’s Automobiles section, I review gas- and diesel-burning versions of the third-generation M元50,
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