Mercedes sales staffers: Get ready for ribald jokes about standard-equipment urinals and emergency fill-ups when you explain to customers that they have a new fluid level to check.
Those gags already are rife in the online community's discussions of the urea additive used to reduce exhaust emissions in some diesel-powered vehicles.
Dealers of other brands won't be immune, either. Any dealership that sells a diesel vehicle eventually may have to contend with urea. And it doesn't end with jokes.
Mercedes expects to refill the urea tank in its diesel vehicles when customers return to the dealership every 10,000 miles for regularly scheduled maintenance. If customers fail to do so and the tank isn't refilled, the driver could be stranded.
Mercedes warns the driver with an instrument panel light if the tank falls below one gallon of fluid. If the urea level gets "critically low," a counter will appear on the dashboard saying 20 restarts remain.
"It will count down, and if you ignore all those warnings, then it won't start," said Dan Barile, a Mercedes-Benz USA spokesman.