Mercedes Benz Sl Class MPG by Year & Engine (EPA)
EPA fuel-economy ratings for every rated Mercedes Benz Sl Class model year from 1994 to 2026 — each engine and transmission with its official city, highway and combined figures. Over these years the Sl Class has been offered with 4.0L 8-cyl, 3.0L 6-cyl, 4.7L 8-cyl, 5.5L 8-cyl, 6.0L 12-cyl, 6.2L 8-cyl power plants; the most efficient version is the 2019 (up to 23 MPG combined). Every rated version calls for premium gasoline. Data: U.S. Department of Energy & EPA, fueleconomy.gov; prices are live medians from VehiSales listings.
Mercedes Benz Sl Class fuel economy by year
| Year | Combined MPG | Engines | Median used price | For sale |
|---|---|---|---|---|
| 2026 | 16 | 4.0L 8-cyl | $158,145 | 32 listings |
| 2020 | 20–22 | 3.0L 6-cyl, 4.7L 8-cyl | $61,750 | 14 listings |
| 2019 | 20–23 | 3.0L 6-cyl, 4.7L 8-cyl | $65,000 | 5 listings |
| 2018 | 20–23 | 3.0L 6-cyl, 4.7L 8-cyl | $37,895 | 13 listings |
| 2017 | 20–23 | 3.0L 6-cyl, 4.7L 8-cyl | $42,789 | 10 listings |
| 2016 | 19–23 | 3.0L 6-cyl, 4.7L 8-cyl | $46,495 | 25 listings |
| 2015 | 17–23 | 3.0L 6-cyl, 4.7L 8-cyl, 5.5L 8-cyl, 6.0L 12-cyl | $40,998 | 9 listings |
| 2014 | 17–20 | 4.7L 8-cyl, 5.5L 8-cyl, 6.0L 12-cyl | — | — |
| 2013 | 17–20 | 4.7L 8-cyl, 5.5L 8-cyl, 6.0L 12-cyl | — | — |
| 2012 | 14–17 | 5.5L 8-cyl, 6.2L 8-cyl | — | — |
| 2011 | 14–17 | 5.5L 8-cyl, 6.3L 8-cyl, 6.0L 12-cyl | — | — |
| 2009 | 14–16 | 5.5L 8-cyl, 6.0L 12-cyl, 6.2L 8-cyl, 5.5L 12-cyl | — | — |
| 2008 | 14–16 | 5.5L 8-cyl, 6.0L 12-cyl, 5.5L 12-cyl, 5.4L 8-cyl | — | — |
| 2007 | 14–16 | 5.5L 8-cyl, 6.0L 12-cyl, 5.5L 12-cyl, 5.4L 8-cyl | — | — |
| 2006 | 14–17 | 5.0L 8-cyl, 5.4L 8-cyl, 6.0L 12-cyl, 5.5L 12-cyl | — | — |
| 2005 | 13–17 | 5.0L 8-cyl, 5.4L 8-cyl, 5.5L 12-cyl, 6.0L 12-cyl | — | — |
| 2004 | 14–17 | 5.0L 8-cyl, 5.4L 8-cyl, 5.5L 12-cyl | — | — |
| 2003 | 14–16 | 5.0L 8-cyl, 5.5L 8-cyl | — | — |
| 2002 | 14–17 | 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 2001 | 14–17 | 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 2000 | 14–17 | 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 1999 | 14–17 | 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 1998 | 14–17 | 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 1997 | 14–18 | 3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 1996 | 14–18 | 3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 1995 | 13–18 | 3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl | — | — |
| 1994 | 13–18 | 3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl | — | — |
2026 Mercedes Benz Sl Class: engines & MPG
The 2026 Sl Class was EPA-rated in 1 version (4.0L 8-cyl), with combined economy of 16 MPG. Used 2026 models currently list for a median of $158,145 on VehiSales (32 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL680 Maybach | 4.0L 8-cyl | Automatic 9-spd | Premium | 13 | 20 | 16 MPG |
2020 Mercedes Benz Sl Class: engines & MPG
The 2020 Sl Class was EPA-rated in 2 versions (3.0L 6-cyl, 4.7L 8-cyl), with combined economy from 20 to 22 MPG. Used 2020 models currently list for a median of $61,750 on VehiSales (14 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL450 | 3.0L 6-cyl | Automatic 9-spd | Premium | 20 | 28 | 22 MPG |
| SL550 | 4.7L 8-cyl | Automatic 9-spd | Premium | 17 | 25 | 20 MPG |
2019 Mercedes Benz Sl Class: engines & MPG
The 2019 Sl Class was EPA-rated in 2 versions (3.0L 6-cyl, 4.7L 8-cyl), with combined economy from 20 to 23 MPG. Used 2019 models currently list for a median of $65,000 on VehiSales (5 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL450 | 3.0L 6-cyl | Automatic 9-spd | Premium | 20 | 28 | 23 MPG |
| SL550 | 4.7L 8-cyl | Automatic 9-spd | Premium | 17 | 25 | 20 MPG |
2018 Mercedes Benz Sl Class: engines & MPG
The 2018 Sl Class was EPA-rated in 2 versions (3.0L 6-cyl, 4.7L 8-cyl), with combined economy from 20 to 23 MPG. Used 2018 models currently list for a median of $37,895 on VehiSales (13 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL450 | 3.0L 6-cyl | Automatic 9-spd | Premium | 20 | 28 | 23 MPG |
| SL550 | 4.7L 8-cyl | Automatic 9-spd | Premium | 17 | 25 | 20 MPG |
2017 Mercedes Benz Sl Class: engines & MPG
The 2017 Sl Class was EPA-rated in 2 versions (3.0L 6-cyl, 4.7L 8-cyl), with combined economy from 20 to 23 MPG. Used 2017 models currently list for a median of $42,789 on VehiSales (10 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL450 | 3.0L 6-cyl | Automatic 9-spd | Premium | 20 | 28 | 23 MPG |
| SL550 | 4.7L 8-cyl | Automatic 9-spd | Premium | 17 | 25 | 20 MPG |
2016 Mercedes Benz Sl Class: engines & MPG
The 2016 Sl Class was EPA-rated in 2 versions (3.0L 6-cyl, 4.7L 8-cyl), with combined economy from 19 to 23 MPG. Used 2016 models currently list for a median of $46,495 on VehiSales (25 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL400 | 3.0L 6-cyl | Automatic 7-spd | Premium | 20 | 27 | 23 MPG |
| SL550 | 4.7L 8-cyl | Automatic 7-spd | Premium | 16 | 24 | 19 MPG |
2015 Mercedes Benz Sl Class: engines & MPG
The 2015 Sl Class was EPA-rated in 4 versions (3.0L 6-cyl, 4.7L 8-cyl, 5.5L 8-cyl, 6.0L 12-cyl), with combined economy from 17 to 23 MPG. Used 2015 models currently list for a median of $40,998 on VehiSales (9 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL400 | 3.0L 6-cyl | Automatic 7-spd | Premium | 20 | 27 | 23 MPG |
| SL550 | 4.7L 8-cyl | Automatic 7-spd | Premium | 18 | 24 | 20 MPG |
| SL63 AMG | 5.5L 8-cyl | Automatic 7-spd | Premium | 16 | 25 | 19 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic 7-spd | Premium | 14 | 21 | 17 MPG |
2014 Mercedes Benz Sl Class: engines & MPG
The 2014 Sl Class was EPA-rated in 3 versions (4.7L 8-cyl, 5.5L 8-cyl, 6.0L 12-cyl), with combined economy from 17 to 20 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL550 | 4.7L 8-cyl | Automatic 7-spd | Premium | 18 | 24 | 20 MPG |
| SL63 AMG | 5.5L 8-cyl | Automatic 7-spd | Premium | 16 | 25 | 19 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic 7-spd | Premium | 14 | 21 | 17 MPG |
2013 Mercedes Benz Sl Class: engines & MPG
The 2013 Sl Class was EPA-rated in 3 versions (4.7L 8-cyl, 5.5L 8-cyl, 6.0L 12-cyl), with combined economy from 17 to 20 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL550 | 4.7L 8-cyl | Automatic 7-spd | Premium | 17 | 25 | 20 MPG |
| SL63 AMG | 5.5L 8-cyl | Automatic 7-spd | Premium | 16 | 25 | 19 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic 7-spd | Premium | 14 | 21 | 17 MPG |
2012 Mercedes Benz Sl Class: engines & MPG
The 2012 Sl Class was EPA-rated in 2 versions (5.5L 8-cyl, 6.2L 8-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL550 | 5.5L 8-cyl | Automatic 7-spd | Premium | 14 | 22 | 17 MPG |
| SL63 AMG | 6.2L 8-cyl | Automatic 7-spd | Premium | 12 | 19 | 14 MPG |
2011 Mercedes Benz Sl Class: engines & MPG
The 2011 Sl Class was EPA-rated in 3 versions (5.5L 8-cyl, 6.3L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL550 | 5.5L 8-cyl | Automatic 7-spd | Premium | 14 | 22 | 17 MPG |
| SL63 AMG | 6.3L 8-cyl | Automatic 7-spd | Premium | 12 | 19 | 14 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 18 | 14 MPG |
2009 Mercedes Benz Sl Class: engines & MPG
The 2009 Sl Class was EPA-rated in 4 versions (5.5L 8-cyl, 6.0L 12-cyl, 6.2L 8-cyl, 5.5L 12-cyl), with combined economy from 14 to 16 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL550 | 5.5L 8-cyl | Automatic 7-spd | Premium | 13 | 21 | 16 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic (S5) | Premium | 11 | 18 | 14 MPG |
| SL63 AMG | 6.2L 8-cyl | Automatic (S7) | Premium | 12 | 19 | 14 MPG |
| SL600 | 5.5L 12-cyl | Automatic 5-spd | Premium | 11 | 18 | 14 MPG |
2008 Mercedes Benz Sl Class: engines & MPG
The 2008 Sl Class was EPA-rated in 4 versions (5.5L 8-cyl, 6.0L 12-cyl, 5.5L 12-cyl, 5.4L 8-cyl), with combined economy from 14 to 16 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL550 | 5.5L 8-cyl | Automatic 7-spd | Premium | 14 | 21 | 16 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic (S5) | Premium | 11 | 18 | 14 MPG |
| SL600 | 5.5L 12-cyl | Automatic 5-spd | Premium | 11 | 18 | 14 MPG |
| SL55 AMG | 5.4L 8-cyl | Automatic (S5) | Premium | 12 | 17 | 14 MPG |
2007 Mercedes Benz Sl Class: engines & MPG
The 2007 Sl Class was EPA-rated in 4 versions (5.5L 8-cyl, 6.0L 12-cyl, 5.5L 12-cyl, 5.4L 8-cyl), with combined economy from 14 to 16 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL550 | 5.5L 8-cyl | Automatic 7-spd | Premium | 13 | 21 | 16 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic (S5) | Premium | 11 | 18 | 14 MPG |
| SL600 | 5.5L 12-cyl | Automatic 5-spd | Premium | 11 | 18 | 14 MPG |
| SL55 AMG | 5.4L 8-cyl | Automatic (S5) | Premium | 12 | 17 | 14 MPG |
2006 Mercedes Benz Sl Class: engines & MPG
The 2006 Sl Class was EPA-rated in 4 versions (5.0L 8-cyl, 5.4L 8-cyl, 6.0L 12-cyl, 5.5L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 7-spd | Premium | 14 | 22 | 17 MPG |
| SL55 AMG | 5.4L 8-cyl | Automatic (S5) | Premium | 12 | 19 | 15 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic (S5) | Premium | 12 | 18 | 14 MPG |
| SL600 | 5.5L 12-cyl | Automatic 5-spd | Premium | 11 | 18 | 14 MPG |
2005 Mercedes Benz Sl Class: engines & MPG
The 2005 Sl Class was EPA-rated in 4 versions (5.0L 8-cyl, 5.4L 8-cyl, 5.5L 12-cyl, 6.0L 12-cyl), with combined economy from 13 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 7-spd | Premium | 14 | 21 | 17 MPG |
| SL55 AMG | 5.4L 8-cyl | Automatic (S5) | Premium | 12 | 18 | 14 MPG |
| SL600 | 5.5L 12-cyl | Automatic 5-spd | Premium | 11 | 18 | 14 MPG |
| SL65 AMG | 6.0L 12-cyl | Automatic (S5) | Premium | 11 | 18 | 13 MPG |
2004 Mercedes Benz Sl Class: engines & MPG
The 2004 Sl Class was EPA-rated in 3 versions (5.0L 8-cyl, 5.4L 8-cyl, 5.5L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 7-spd | Premium | 14 | 21 | 17 MPG |
| SL55 AMG | 5.4L 8-cyl | Automatic (S5) | Premium | 13 | 19 | 15 MPG |
| SL600 | 5.5L 12-cyl | Automatic 5-spd | Premium | 12 | 17 | 14 MPG |
2003 Mercedes Benz Sl Class: engines & MPG
The 2003 Sl Class was EPA-rated in 2 versions (5.0L 8-cyl, 5.5L 8-cyl), with combined economy from 14 to 16 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 14 | 20 | 16 MPG |
| SL55 AMG | 5.5L 8-cyl | Automatic 5-spd | Premium | 12 | 18 | 14 MPG |
2002 Mercedes Benz Sl Class: engines & MPG
The 2002 Sl Class was EPA-rated in 2 versions (5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 15 | 22 | 17 MPG |
| SL600 | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 17 | 14 MPG |
2001 Mercedes Benz Sl Class: engines & MPG
The 2001 Sl Class was EPA-rated in 2 versions (5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 14 | 21 | 17 MPG |
| SL600 | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 17 | 14 MPG |
2000 Mercedes Benz Sl Class: engines & MPG
The 2000 Sl Class was EPA-rated in 2 versions (5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 14 | 21 | 17 MPG |
| SL600 | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 18 | 14 MPG |
1999 Mercedes Benz Sl Class: engines & MPG
The 1999 Sl Class was EPA-rated in 2 versions (5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 14 | 21 | 17 MPG |
| SL600 | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 17 | 14 MPG |
1998 Mercedes Benz Sl Class: engines & MPG
The 1998 Sl Class was EPA-rated in 2 versions (5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 17 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 14 | 21 | 17 MPG |
| SL600 | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 18 | 14 MPG |
1997 Mercedes Benz Sl Class: engines & MPG
The 1997 Sl Class was EPA-rated in 3 versions (3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 18 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL320 | 3.2L 6-cyl | Automatic 5-spd | Premium | 16 | 22 | 18 MPG |
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 14 | 21 | 16 MPG |
| SL600 | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 19 | 14 MPG |
1996 Mercedes Benz Sl Class: engines & MPG
The 1996 Sl Class was EPA-rated in 3 versions (3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 14 to 18 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL320 | 3.2L 6-cyl | Automatic 5-spd | Premium | 15 | 22 | 18 MPG |
| SL500 | 5.0L 8-cyl | Automatic 5-spd | Premium | 15 | 22 | 17 MPG |
| SL600 | 6.0L 12-cyl | Automatic 5-spd | Premium | 12 | 19 | 14 MPG |
1995 Mercedes Benz Sl Class: engines & MPG
The 1995 Sl Class was EPA-rated in 3 versions (3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 13 to 18 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL320 | 3.2L 6-cyl | Automatic 5-spd | Premium | 15 | 22 | 18 MPG |
| SL500 | 5.0L 8-cyl | Automatic 4-spd | Premium | 15 | 20 | 16 MPG |
| SL600 | 6.0L 12-cyl | Automatic 4-spd | Premium | 12 | 16 | 13 MPG |
1994 Mercedes Benz Sl Class: engines & MPG
The 1994 Sl Class was EPA-rated in 3 versions (3.2L 6-cyl, 5.0L 8-cyl, 6.0L 12-cyl), with combined economy from 13 to 18 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| SL320 | 3.2L 6-cyl | Automatic 4-spd | Premium | 15 | 22 | 18 MPG |
| SL500 | 5.0L 8-cyl | Automatic 4-spd | Premium | 14 | 19 | 16 MPG |
| SL600 | 6.0L 12-cyl | Automatic 4-spd | Premium | 11 | 16 | 13 MPG |
Frequently asked questions
What MPG does a Mercedes Benz Sl Class get?
Depending on year and engine, EPA combined economy for the Sl Class ranges from 13 to 23 MPG. The most efficient rated version is the 2019 model year.
What engines does the 2026 Mercedes Benz Sl Class have?
The 2026 Sl Class was EPA-rated with 4.0L 8-cyl — see the 2026 table above for each version's exact city/highway figures.
Does the Mercedes Benz Sl Class require premium gas?
Yes — every EPA-rated Sl Class version specifies premium gasoline.
https://vehisales.com/research/fuel-economy/mercedes-benz/sl-class.
Underlying ratings are public-domain EPA/DOE data from fueleconomy.gov.
See also: Mercedes Benz Sl Class hub — live listings, prices & reliability · Most fuel-efficient cars by segment · Model price trends. Media inquiries: [email protected].