Audi A6 / S6 / RS6 vs. Mercedes-Benz GL MPG

Chart is based on 229 fuel economy reports for the Audi A6 / S6 / RS6 and 48 fuel economy reports for the Mercedes-Benz GL.

Audi A6 / S6 / RS6 MPG

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	MPG
2018	4dr Sedan supercharged 340hp 3.0L V6 8-speed shiftable automatic AWD	flat	med	hvy	5	5	35	55	65	30.0
2016	4dr Sedan supercharged 333hp 3.0L V6 8-speed shiftable automatic AWD	flat	med	none	0	10	5	85	80	31.4
2014	4dr Sedan supercharged 310hp 3.0L V6 8-speed shiftable automatic AWD	flat	med	hvy	0	10	50	40	80	26.7
2013	4dr Sedan turbocharged 420hp 4.0L V8 7-speed automated manual AWD	flat	med	light	0	100	0	0	0	17.3
2013	4dr Sedan supercharged 310hp 3.0L V6 8-speed shiftable automatic AWD	hills	lead	none	0	10	25	65	70	22.5
2012	4dr Sedan supercharged 310hp 3.0L V6 8-speed shiftable automatic AWD	flat	med	none	10	0	0	90	65	32.0
2011	4dr Sedan supercharged 300hp 3.0L V6 6-speed shiftable automatic AWD	flat	med	hvy	30	45	10	15	70	23.8
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2010	4dr Wagon supercharged 300hp 3.0L V6 6-speed shiftable automatic AWD	flat	med	light	10	20	40	30	75	25.0
2010	4dr Sedan supercharged 300hp 3.0L V6 6-speed shiftable automatic AWD	flat	med	light	9	6	20	65	88	24.5
2008	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	flat	med	none	15	20	25	40	65	20.0
2007	4dr Wagon 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	flat	med	light	0	11	40	49	75	20.2
2007	4dr Sedan 435-horsepower 5.2L V10 6-speed shiftable automatic AWD	flat	med	light	30	50	5	15	70	12.1
2007	4dr Sedan 350-horsepower 4.2L V8 6-speed shiftable automatic AWD	flat	med	light	10	5	20	65	70	20.5
2007	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	hills	light	light	3	10	34	55	63	24.9
2006.5	4dr Sedan turbocharged 140hp 2.0L I4 Diesel 6-speed manual FWD	flat	v.lt	none	5	0	0	95	60	41.6
2006	4dr Wagon 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	flat	med	light	16	17	22	44	78	23.9
2006	4dr Sedan 335-horsepower 4.2L V8 6-speed shiftable automatic AWD	flat	med	none	1	2	34	63	82	19.3
2006	4dr Sedan 255-horsepower 3.1L V6 7-speed shiftable CVT FWD	flat	med	hvy	30	20	20	30	80	28.6
2006	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	flat	med	light	8	14	16	62	77	25.0
2005	4dr Sedan 335-horsepower 4.2L V8 6-speed shiftable automatic AWD	flat	med	light	1	4	28	67	77	18.3
2005	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	flat	med	light	11	13	23	54	81	21.7
2004	4dr Sedan 300-horsepower 4.2L V8 5-speed shiftable automatic AWD	flat	med	none	25	25	25	25	75	18.1
2004	4dr Sedan 265-horsepower 2.7L V6 5-speed shiftable automatic AWD	flat	med	light	4	25	17	54	70	20.6
2004	4dr Sedan 220-horsepower 3.0L V6 5-speed shiftable automatic AWD	flat	med	none	5	0	0	95	68	20.2
2003	4dr Wagon 340-horsepower 4.2L V8 5-speed shiftable automatic AWD	flat	lead	hvy	20	20	30	30	80	16.0
2003	4dr Sedan turbocharged 450hp 4.2L V8 5-speed shiftable automatic AWD	flat	med	light	2	5	22	72	75	20.4
2003	4dr Sedan turbocharged 250hp 2.7L V6 6-speed manual AWD	flat	med	none	0	20	30	50	75	22.0
2003	4dr Sedan turbocharged 250hp 2.7L V6 5-speed shiftable automatic AWD	flat	light	light	5	7	12	76	70	22.0
2003	4dr Sedan 300-horsepower 4.2L V8 5-speed shiftable automatic AWD	hills	med	light	13	8	15	65	90	21.0
2003	4dr Sedan 220-horsepower 3.0L V6 5-speed shiftable automatic AWD	flat	light	light	16	13	30	40	88	20.4
2002	4dr Wagon 220-horsepower 3.0L V6 5-speed shiftable automatic AWD	flat	light	light	15	15	10	60	60	21.3
2002	4dr Sedan turbocharged 250hp 2.7L V6 6-speed manual AWD	flat	med	none	35	14	9	44	75	16.1
2002	4dr Sedan turbocharged 250hp 2.7L V6 5-speed shiftable automatic AWD	flat	med	light	12	32	13	43	66	19.0
2002	4dr Sedan 300-horsepower 4.2L V8 5-speed shiftable automatic AWD	flat	light	light	6	20	29	45	62	19.4
2002	4dr Sedan 220-horsepower 3.0L V6 6-speed shiftable CVT FWD	flat	med	light	10	40	10	40	70	24.0
2002	4dr Sedan 220-horsepower 3.0L V6 5-speed shiftable automatic AWD	flat	light	hvy	10	30	50	10	65	18.7
2001	4dr Sedan turbocharged 250hp 2.7L V6 6-speed manual AWD	flat	med	light	3	33	58	8	75	21.5
2001	4dr Sedan turbocharged 250hp 2.7L V6 5-speed shiftable automatic AWD	flat	med	none	4	12	29	55	71	20.7
2001	4dr Sedan 200-horsepower 2.8L V6 5-speed shiftable automatic AWD	hills	med	hvy	10	30	28	33	65	21.2
2000	4dr Wagon 200-horsepower 2.8L V6 5-speed shiftable automatic AWD	hills	med	hvy	10	30	10	50	65	20.0
2000	4dr Sedan turbocharged 250hp 2.7L V6 6-speed manual AWD	flat	med	none	10	20	10	60	120	20.8
2000	4dr Sedan 200-horsepower 2.8L V6 5-speed shiftable automatic FWD	hills	light	light	45	20	5	30	60	16.5
2000	4dr Sedan 200-horsepower 2.8L V6 5-speed shiftable automatic AWD	hills	med	none	8	23	35	33	72	21.0

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This page shows only averages. See all the Audi A6 / S6 / RS6 fuel economy data.

Mercedes-Benz GL MPG

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	MPG
2014	4dr SUV turbocharged 240hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	1	4	15	80	65	27.3
2011	4dr SUV 382-horsepower 5.5L V8 7-speed shiftable automatic AWD	flat	light	hvy	1	49	20	30	70	15.0
2010	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	7	13	34	46	64	24.0
2009	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	med	hvy	0	13	60	27	72	22.5
2009	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD	flat	med	light	21	22	27	30	60	18.0
2008	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	6	23	31	41	71	22.4
2008	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD w/low range	flat	med	hvy	13	30	28	30	83	17.0
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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	17.3
2007	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	hills	light	light	3	12	22	64	67	25.3
2007	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD w/low range	hills	med	light	15	21	22	42	60	16.0
2007	4dr SUV 335-horsepower 4.7L V8 7-speed shiftable automatic AWD	flat	med	light	9	16	38	38	65	17.4

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

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What Our Members Are Saying about the Real Gas Mileage of the Audi A6 / S6 / RS6

Audi A6 / S6 / RS6 Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2008	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	It is @ least 4 mpg better hwy & city see full Audi A6 / S6 / RS6 review
2006	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	It's hard to imagine such a powerful luxury car can get such great gas mileage. On a recent trip to Montreal I calculated my fuel economy to be somewhere in the 27mpg range....incredible! see full Audi A6 / S6 / RS6 review
2006	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	better then 28 mpg on highway due to transmission gearing see full Audi A6 / S6 / RS6 review
2006	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	Despite the performance of the A6 3.2 it delivers great mpg for such a large car. It excels on the open road. With cruise it is possible to achieve a range of 650+ miles on a tankful. see full Audi A6 / S6 / RS6 review
2006	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	With the FSI and V6, I regularly see 27 mpg in city. And arround 30-32 mpg highway (no A/C on, and cruising at 80 mph). see full Audi A6 / S6 / RS6 review
2006	4dr Sedan 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	21=22 mpg in cit/commute/highway driving -- pretty good for a large luxury car that weighs 4000+ pounds. see full Audi A6 / S6 / RS6 review
2004	4dr Sedan 220-horsepower 3.0L V6 6-speed shiftable CVT FWD	Typically 22-24 in-town and 29-31 on the road. Excellent economy for car size and level of comfort. see full Audi A6 / S6 / RS6 review

Audi A6 / S6 / RS6 Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2006	4dr Wagon 255-horsepower 3.1L V6 6-speed shiftable automatic AWD	Poor relative to power see full Audi A6 / S6 / RS6 review
2006	4dr Sedan 335-horsepower 4.2L V8 6-speed shiftable automatic AWD	this is not a car to be used as a city daily driver -- the best mpg you will get in all city driving is 12mpg see full Audi A6 / S6 / RS6 review
2002	4dr Sedan turbocharged 250hp 2.7L V6 6-speed manual AWD	For a car that requires 91+ octane, it would be nice if it got better gas mileage in city driving (around 16-18 mpg). The mileage on the highway is much better (up to 26 mpg). see full Audi A6 / S6 / RS6 review

TrueDelta Reviews the Real Gas Mileage of the Mercedes-Benz GL

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

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

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