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Ford Flex vs. Mercedes-Benz S-Class Fuel Economy (km/L)

Chart is based on 390 fuel economy reports for the Ford Flex and 22 fuel economy reports for the Mercedes-Benz S-Class.

Ford Flex km/L

Ford Flex Ford Flex 2014 7.6 MPG Highway Percentage 45 percent Ford Flex Ford Flex 2013 44.1 MPG Highway Percentage 60 percent Ford Flex Ford Flex 2013 43.8 MPG Highway Percentage 37 percent Ford Flex Ford Flex 2012 55.6 MPG Highway Percentage 59 percent Ford Flex Ford Flex 2011 33.0 MPG Highway Percentage 28 percent Ford Flex Ford Flex 2011 52.9 MPG Highway Percentage 25 percent Ford Flex Ford Flex 2011 41.9 MPG Highway Percentage 10 percent Ford Flex Ford Flex 2010 43.7 MPG Highway Percentage 61 percent Ford Flex Ford Flex 2010 51.2 MPG Highway Percentage 48 percent Ford Flex Ford Flex 2010 9.1 MPG Highway Percentage 67 percent Ford Flex Ford Flex 2009 50.6 MPG Highway Percentage 62 percent Ford Flex Ford Flex 2009 39.7 MPG Highway Percentage 22 percent
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd km/L
2014 4dr SUV 287-horsepower 3.5L V6
6-speed shiftable automatic AWD		 flat light none 0 55 0 45 110 7.6  
2013 4dr SUV turbocharged 365hp 3.5L V6
6-speed shiftable automatic AWD		 flat med hvy 10 20 10 60 70 44.1  
2013 4dr SUV 287-horsepower 3.5L V6
6-speed shiftable automatic FWD		 flat light hvy 5 0 58 37 75 43.8  
2012 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat med none 0 16 26 59 68 55.6  
2011 4dr SUV turbocharged 355hp 3.5L V6
6-speed shiftable automatic AWD		 flat med light 47 10 15 28 80 33.0  
2011 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat light none 0 25 50 25 75 52.9  
2011 4dr SUV 262-horsepower 3.5L V6
6-speed automatic AWD		 flat light none 10 60 20 10 60 41.9  
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2010 4dr SUV turbocharged 355hp 3.5L V6
6-speed shiftable automatic AWD		 flat med none 6 10 23 61 73 43.7  
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat light none 5 23 25 48 66 51.2  
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic AWD		 flat med none 0 33 0 67 100 9.1  
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat light light 2 13 23 62 70 50.6  
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic AWD		 hills med light 4 36 38 22 68 39.7  

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This page shows only averages. See all the Ford Flex fuel economy data.

Mercedes-Benz S-Class km/L

Mercedes-Benz S-Class Mercedes-Benz S-Class 2007 51.3 MPG Highway Percentage 45 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2007 58.8 MPG Highway Percentage 70 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2006 58.0 MPG Highway Percentage 98 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2006 55.3 MPG Highway Percentage 80 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2006 54.1 MPG Highway Percentage 85 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2004 46.7 MPG Highway Percentage 47 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2004 56.5 MPG Highway Percentage 80 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2003 27.4 MPG Highway Percentage 68 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2003 41.5 MPG Highway Percentage 71 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2002 45.9 MPG Highway Percentage 29 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2001 5.0 MPG Highway Percentage 0 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2000 56.3 MPG Highway Percentage 82 percent
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd km/L
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic RWD		 flat med none 5 15 35 45 62 51.3  
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic AWD		 flat light none 10 10 10 70 65 58.8  
2006 4dr Sedan, ext. 302-horsepower 5.0L V8
7-speed shiftable automatic RWD		 flat med hvy 1 1 0 98 78 58.0  
2006 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic AWD		 flat light none 0 0 20 80 65 55.3  
2006 4dr Sedan, ext. 275-horsepower 4.3L V8
7-speed shiftable automatic RWD		 flat light hvy 0 15 0 85 60 54.1  
2004 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic AWD		 flat med none 1 45 8 47 80 46.7  
2004 4dr Sedan, ext. 275-horsepower 4.3L V8
7-speed shiftable automatic RWD		 flat med hvy 0 2 18 80 75 56.5  
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2003 4dr Sedan, ext. turbocharged 493hp 5.5L V12
5-speed shiftable automatic RWD		 flat light light 7 11 15 68 108 27.4  
2003 4dr Sedan, ext. 275-horsepower 4.3L V8
5-speed shiftable automatic RWD		 flat med hvy 6 12 12 71 70 41.5  
2002 4dr Sedan, ext. 275-horsepower 4.3L V8
5-speed shiftable automatic RWD		 flat med hvy 13 6 54 29 68 45.9  
2001 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic RWD		 flat med none 20 80 0 0 0 5.0  
2000 4dr Sedan, ext. 275-horsepower 4.3L V8
5-speed shiftable automatic RWD		 flat v.lt light 0 7 11 82 62 56.3  

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This page shows only averages. See all the Mercedes-Benz S-Class fuel economy data.

Ford Flex vs. Mercedes-Benz S-Class Fuel Economy (km/L)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Ford Flex and Mercedes-Benz S-Class's where a car was driven. So you can get an idea of their real-world km/L based on how and where you drive a car.

See TrueDelta's information for all SUVs
See TrueDelta's information for all Ford models and Mercedes-Benz models.

What Our Members Are Saying about the Real Gas Mileage of the Ford Flex

Ford Flex Real Gas Mileage: Pros
YearBody/PowertrainComment
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 I am currently averaging 20 MPG overall with heavy highway use. For the size of vehicle I think that is rather reasonable. see full Ford Flex review
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 1000 miles of ownership so far, 21-22 mpg in light suburb and highway driving, 24-25 mpg on 500 mile trip (fuel economy measured by calculating miles driven divided by gallons of fuel purchased). see full Ford Flex review
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 Only driven around town, mileage 16.6, have never had it on the open road. see full Ford Flex review
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 Very good for a 4500 lb vehicle. see full Ford Flex review
 

What Our Members Are Saying about the Real Gas Mileage of the Mercedes-Benz S-Class

Mercedes-Benz S-Class Real Gas Mileage: Pros
YearBody/PowertrainComment
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic RWD		 Since my driving is about 50-50 city and highway, I average about 20-21 mpg, using premium fuel. All highway is 29-30mpg and all city is 14-15mpg. see full Mercedes-Benz S-Class review
2007 0 While on long trips at 70-80mph I average 32mpg around town it never goes better than 24mpg. Easy on the pedal sure shows results but fully loaded the thing shifts like a two door sports. see full Mercedes-Benz S-Class review
Mercedes-Benz S-Class Real Gas Mileage: Cons
YearBody/PowertrainComment
2007 4dr Sedan turbocharged 232hp 3.0L V6 Diesel
7-speed shiftable automatic RWD		 Very, very expensive see full Mercedes-Benz S-Class review
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic RWD		 Driving it in a lot of stop and go traffic it drinks gas. see full Mercedes-Benz S-Class review
2007 0 Fuel cost are a killer and servicing requires finding an allternative to the Mercedes Garage see full Mercedes-Benz S-Class review
2001 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic RWD		 20l/100km but its still worth it see full Mercedes-Benz S-Class review