Mercedes-Benz SLK-Class Fuel Economy (MPG)

Name: Mercedes-Benz SLK-Class MPG & Fuel Economy
Creator: AutoSpecData
License: https://creativecommons.org/licenses/by/4.0/

What is the real-world gas mileage of a 2016 Mercedes-Benz SLK-Class?

The 2016 Mercedes-Benz SLK-Class gets up to 27 MPG combined (24 city / 32 highway) in EPA testing.

Latest model year (2016):

The Mercedes-Benz SLK-Class gets up to 27 MPG combined (24 city / 32 highway) in the Auto 9-spd, 4 cyl, 2.0 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026

Overview MPG Engine Specs Fuel Cost Transmission Drivetrain Vehicle Class Maintenance Dimensions Curb Weight

Mercedes-Benz SLK-Class MPG — All Years

Year	Trim	Engine	Fuel	City (MPG)	Hwy (MPG)	Combined (MPG)
2016Config 1 of 3	Auto 7-spd, 6 cyl, 3.5 L	6 3.5L	Premium Gasoline	21	29	24
2016Config 2 of 3	Auto 7-spd, 8 cyl, 5.5 L	8 5.5L	Premium Gasoline	19	28	22
2016Config 3 of 3	Auto 9-spd, 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	24	32	27
2015Config 1 of 4	Auto 7-spd, 4 cyl, 1.8 L	4 1.8L	Premium Gasoline	23	32	26
2015Config 2 of 4	Auto 7-spd, 6 cyl, 3.5 L	6 3.5L	Premium Gasoline	21	28	24
2015Config 3 of 4	Auto 7-spd, 8 cyl, 5.5 L	8 5.5L	Premium Gasoline	19	28	22
2015Config 4 of 4	Man 6-spd, 4 cyl, 1.8 L	4 1.8L	Premium Gasoline	22	32	26

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Mercedes-Benz SLK-Class data analysis

How Mercedes-Benz SLK-Class combined fuel economy varies

Across 7 configurations recorded for the 2015 through 2016 Mercedes-Benz SLK-Class, combined fuel economy runs from 22 MPG to 27 MPG. The strongest figure belongs to the 2016 Mercedes-Benz SLK-Class (Auto 9-spd, 4 cyl, 2.0 L) at 27 MPG, and the weakest to the 2016 car (Auto 7-spd, 8 cyl, 5.5 L) at 22 MPG — a spread of 23%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Mercedes-Benz SLK-Class would be misleading.

What changed for 2016

Average combined fuel economy for the 2016 Mercedes-Benz SLK-Class is 24.3 MPG, against 24.5 MPG for the 2015 car — it fell by 0.2 MPG. Buyers who care most about this figure should look at the earlier model years in the table above before assuming newest is best.

How to read this Mercedes-Benz SLK-Class data

This page lists every 2015 through 2016 Mercedes-Benz SLK-Class record we hold for this measurement — 7 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Where these Mercedes-Benz SLK-Class figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Mercedes-Benz SLK-Class record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speed	EPA highway spec	AutoSpecData adjusted MPG	Fuel you lose
60 mph	32 MPG	32 MPG	0%
65 mph	32 MPG	29.8 MPG	7%
70 mph	32 MPG	27.8 MPG	13%
75 mph	32 MPG	25.9 MPG	19%
80 mph	32 MPG	24.1 MPG	25%

Our Real-World Speed MPG Adjuster re-scales the Mercedes-Benz SLK-Class EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About SLK-Class MPG

What is the MPG of the Mercedes-Benz SLK-Class?

The Mercedes-Benz SLK-Class gets up to 27 MPG combined (24 city / 32 highway) in the 2016 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Mercedes-Benz SLK-Class trim has the best fuel economy?

The Auto 9-spd, 4 cyl, 2.0 L trim offers the best combined fuel economy at 27 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.