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

Chart is based on 36 fuel economy reports for the Mercedes-Benz GLK and 229 fuel economy reports for the Audi A6 / S6 / RS6.

Mercedes-Benz GLK 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
2013	4dr SUV turbocharged 200hp 2.1L I4 Diesel 7-speed shiftable automatic AWD	flat	med	hvy	0	7	53	40	73	35.0
2013	4dr SUV turbocharged 168hp 2.1L I4 Diesel 7-speed shiftable automatic AWD	flat	med	hvy	0	0	5	95	110	36.8
2013	4dr SUV 302-horsepower 3.5L V6 7-speed shiftable automatic RWD	flat	v.lt	hvy	0	0	100	0	0	22.7
2011	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	hills	med	none	0	9	9	83	84	22.9
2010	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic RWD	flat	light	light	8	23	45	24	66	21.8
2010	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	flat	light	light	11	17	24	48	93	18.7

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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.

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

Mercedes-Benz GLK Real Gas Mileage: Pros
Year	Comment
2013	Fuel economy was a "why not to buy" with the GLK350, as the gas-powered Mercedes-Benz crossover trails the competing Audi and BMW in this area. With the diesel, though, the tables turn. BMW doesn't offer a diesel X3 in North America, at least not yet. For 2014, Audi does offer a Q5 TDI.When I heard that Audi was going to offer a diesel compact crossover, I assumed that the engine in question would be a four-cylinder unit. Nope, it's a 240-horsepower 3.0-liter V6. The official line: a four-cylinder wouldn't suit Audi's performance-oriented brand image in the U.S. With a much smaller engine and (partly as a result) a couple hundred pounds less curb weight, the GLK250 BlueTEC tops the Q5 in fuel economy. But, according to the EPA, only on the highway, with a rating of 33 mpg vs. 31.Both crossovers achieve an EPA city rating of 24 mpg. In the real world, the GLK250 impresses in suburuban driving, with the trip computer usually reporting averages from 31 to 35, and on one run to my son's school nearly 40. This is about 50 percent better than in the GLK350. see full Mercedes-Benz GLK review

Mercedes-Benz GLK Real Gas Mileage: Cons
Year	Comment
2010	If you prioritize performance, the GLK's mandatory 3.5-liter V6, upgraded via direct injection from 268 to 302 horsepower for 2013, might seem a good thing. But even after the power bump, the boosted sixes in the Audi and BMW are stronger, and they're paired with more responsive eight-speed automatics (vs. a seven-speed transmission introduced nearly a decade ago). More of an issue for most potential buyers: fuel economy. The GLK350 is more efficient for 2013, thanks to direct injection, electric-steering assist, driving style feedback, and a shudder-free automatic start/stop system (study it, BMW). The EPA ratings have improved from last year's 16 mpg city, 21 highway to 19/24. But even 19/24 is only marginally competitive in the 2013 challenge. The BMW X3 xDrive28i is nearly as quick, and rates 21/28. The quicker X3 xDrive35i matches the GLK in the city, but does a couple mpg better on the highway. In our real-world suburban driving, the GLK350 trailed the BMW X3 xDrive28i by one to two mpg. Not a big difference, but a difference. Mercedes will soon offer a more fuel-efficient engine option in North American GLKs. But it won't be a smaller gas engine. Instead, the new GLK250 will be motivated by a 190-horsepower, four-cylinder diesel engine. see full Mercedes-Benz GLK review

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

Mercedes-Benz GLK Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2013	4dr SUV turbocharged 168hp 2.1L I4 Diesel 7-speed shiftable automatic AWD	The diesel option was the #1 reason I looked at the vehicule and the deciding point to go with it. At over 200 miles per day to communte, I needed the mileage numbers and in Quebec, diesel is less expensive than regular gas and way less than premium. see full Mercedes-Benz GLK review
2011	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic RWD	better than expected: 19 suburban, 25 highway see full Mercedes-Benz GLK review
2011	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	A major disappointment. But, to be fair, I live at the top of a mountain in LA and all of my past cars also had bad mileage. It isn't bad on the highway...I get average of 22 mpg...but pure city driving drags it down to 16-17. see full Mercedes-Benz GLK review

Mercedes-Benz GLK Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2011	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic RWD	having owned a c280 with 3 liter engine and been very happy with performance plus low 30s highway, mid to high 20s suburban, why not put 3 liter in the glk? while glk is heavier, 3.5 liter penalizes mpg for little better performance. otherwise there is nothing not to like and alot to like about this great vehicle. see full Mercedes-Benz GLK review
2011	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	If you are looking for a Prius....this isn't your car. see full Mercedes-Benz GLK review
2010	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	sad see full Mercedes-Benz GLK review
2010	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	Performance comes at a price...gas mileage more on the order of a full size SUV. Wish a diesel had been available. see full Mercedes-Benz GLK review

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