Why is my 2014 Mercedes E350 smoking excessively smells of gasoline

Hello, if you are using an extreme amount of gasoline, this needs to be resolved before driving further, to prevent more damage from occurring to components. Possible causes would be fuel control concerns related to emissions components, such as measuring oxygen in the exhaust gas. Sensing "lean" running could create the desire to provide more and more fuel. Testing is required to find out if there is a fuel trim issue. You could also have one or more fuel injectors stuck open, causing the extreme use of fuel. Seek professional diagnostic help as soon as possible. www.repairpal.com/repair-shops