BMW 6-Series vs. Mercedes-Benz GL Fuel Economy (g/100m)

Chart is based on 11 fuel economy reports for the BMW 6-Series and 48 fuel economy reports for the Mercedes-Benz GL.

BMW 6-Series g/100m

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	g/100m
2014	2dr Coupe turbocharged 445hp 4.4L V8 8-speed shiftable automatic RWD	flat	lead	light	5	11	11	74	70	5.6
2008	2dr Convertible 360-horsepower 4.8L V8 6-speed shiftable automatic RWD	flat	light	hvy	45	9	18	27	60	5.5
2006	2dr Convertible 255-horsepower 3.0L I6 6-speed manual RWD	flat	med	none	3	20	3	75	72	2.7
2005	2dr Coupe 325-horsepower 4.4L V8 6-speed shiftable automatic RWD	flat	lead	light	10	35	40	15	60	6.0
2005	2dr Coupe 325-horsepower 4.4L V8 6-speed manual RWD	flat	lead	hvy	0	0	40	60	80	5.1
2004	2dr Coupe 325-horsepower 4.4L V8 6-speed shiftable automatic RWD	flat	lead	hvy	0	10	20	70	120	26.6
2004	2dr Coupe 325-horsepower 4.4L V8 6-speed manual RWD	flat	med	none	0	0	0	100	120	23.1

This page shows only averages. See all the BMW 6-Series fuel economy data.

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	g/100m
2014	4dr SUV turbocharged 240hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	1	4	15	80	65	3.7
2011	4dr SUV 382-horsepower 5.5L V8 7-speed shiftable automatic AWD	flat	light	hvy	1	49	20	30	70	6.7
2010	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	7	13	34	46	64	4.2
2009	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	med	hvy	0	13	60	27	72	4.5
2009	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD	flat	med	light	21	22	27	30	60	5.6
2008	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	6	23	31	41	71	6.5
2008	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD w/low range	flat	med	hvy	13	30	28	30	83	5.9
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2008	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD	flat	med	none	21	21	23	35	85	21.6
2007	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	hills	light	light	3	12	22	64	67	4.0
2007	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD w/low range	hills	med	light	15	21	22	42	60	6.3
2007	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD	flat	med	light	9	16	38	38	65	5.8

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

See TrueDelta's information for all Coupes and Convertibles.

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

None of our members have yet commented on the real gas mileage of the BMW 6-Series.

Mercedes-Benz GL Real Gas Mileage: Pros
Year	Comment
2013	In the EPA's fuel economy tests the Mercedes-Benz GL350 BlueTEC rates 19 mpg city and 26 mpg highway. We observed low 20s in casual suburban driving (a few mpg lower with a heavy foot, a few mpg higher with a very light one) and 25.5 on our trip to Chicago and back (which included some heavy urban driving and 70-mph highways). These numbers don't seem so great, given that the GL350 burns diesel? Consider that the GL-Class is not only wide and tall but also very heavy, at nearly 5,500 pounds unloaded. The gas-powered GL450 is rated 14/19. Our family vehicle, a Ford Taurus X that weighs over 1,000 pounds less than the Mercedes, struggles to crack 22 on the highway. The Audi Q7 rates the same in city driving, and a couple mpg better on the highway. Since the GL350 is almost in another class size-wise, I'm calling this one a draw. Multiply this fuel economy by a 26.4-gallon tank, and the GL350 can go quite far between $100+ fill-ups. Is it really possible to drive the nearly 300 miles to Chicago--and then back--on one tank? Yes it is, with nearly a quarter-tank to spare. (Is it possible to do this without any of three kids needing to stop for a bathroom break? To our even greater surprise, yes to this as well. They were busy watching the $1,950 dual-screen entertainment system.) see full Mercedes-Benz GL review

Mercedes-Benz GL Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2010	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	For a large, seven passenger SUV it can deliver upwards of 28 mpg on the highway. see full Mercedes-Benz GL review
2008	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	25 mpg highway fuel efficiency for a large 7 passenger SUV is fantastic see full Mercedes-Benz GL review
2008	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	Diesel provides 25 MPG on the highway see full Mercedes-Benz GL review

Mercedes-Benz GL Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2010	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD	15 mpg average. premium fuel. see full Mercedes-Benz GL review