Federal safety regulators have begun a probe of fuel leaks in about 250,000 Mercedes-Benz E-Class cars.
The investigation was launched after the National Highway Traffic Safety Administration and Mercedes-Benz received more than 500 complaints from owners about a strong odor of gasoline, mainly after refueling.
The NHTSA said fuel may be leaking from the upper part of the gas tank. No fires or injuries have been reported.
The investigation includes vehicles from 2003 to 2008 model years. The agency is looking into whether the leaks were caused by a 2008 pollution-control recall on the car's fuel filter module.