The contact’s employer owns a 2015 Mercedes-Benz Sprinter 2500. The contact stated that when the vehicle was started in the morning, there was a small puddle of fuel pooling under the fuel tank lid. The contact was not aware of any warning light being illuminated. The contact had taken the vehicle to an independent mechanic who diagnosed the vehicle and determined that the leak was from the fuel filler neck and the fuel filler neck needed to be replaced. The vehicle was not repaired. The contact researched online and related the failure to NHTSA Campaign Number: 17V092000 (Fuel System, Diesel). The manufacturer was informed of the failure and informed the contact that the vehicle was not included in the recall. The contact was transferred by the manufacturer to the NHTSA Hotline. The failure mileage was approximately 180,000.