New Mercedes Benz BlueTec Diesels Won’t Run Without Urea
Posted by Admin on February 25, 2009
As you may know, to meet the stringent diesel emission criteria here in the United States, all the new Mercedes Benz BlueTec diesels use urea. It’s carried in a separate tan and injected into the catalyst. As you’d expect, the urea must be replenished from time to time, generally at the 10,000 mile service intervals, and now Mercedes informs us that their vehicles won’t start if the urea is allowed to run out.
BlueTec cars and SUVs will notify the driver when the 7 gallon urea tank reaches 1 gallon, and again when it runs completely out, allowing 20 additional starts before disabling the vehicle. At least 2 gallons of fluid must be added for the system to reset and permit the car to be started. Now, where might someone find two gallons of urea on the open road? Read the rest of this entry »
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