2008 Mercedes-Benz CLS550Fuel Economy & MPG Ratings
Gasoline Compact CarsRear-Wheel Drive
City
14
MPG
Highway
21
MPG
Combined
16
MPG
Real-World MPG
Based on 2 owner reports via EPA fueleconomy.gov
20.1MPG average+25.4% vs EPA label
EPA combined: 16 MPG · Owner reported avg: 20.1 MPG
Range: 19–22 MPG
Driving mix: City 43% / Highway 58%
Source: EPA fueleconomy.gov “Your MPG” owner submissions. Real-world results vary by driver behavior, conditions, and equipment.
Owner reported MPG for this vehicle averages 20.1 real world MPG based on 2 owner reports. EPA combined rating is 16 MPG.
Trim Comparison
Automatic 7-spd
Premium
City
14
Hwy
21
Comb
16
Fuel cost: $5,100/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 7-spd | Premium | 14 | 21 | 16 | $5,100 |
Annual Fuel Cost
$5,100
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-13,500
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 555 g/mile
- Annual Petroleum Consumption
- 18.6 barrels
Specifications
- Engine
- 5.5L 8-cyl
- Transmission
- 7-speed Automatic
- Drivetrain
- RWD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 5.5L, 8-cylinder
- Fuel Type
- Premium Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$4,209/yr
California
$5.957/gal$5,585/yr
Texas
$3.888/gal$3,645/yr
Florida
$4.136/gal$3,878/yr
New York
$4.522/gal$4,239/yr
Ohio
$4.510/gal$4,228/yr
Washington
$5.591/gal$5,242/yr
Colorado
$4.618/gal$4,329/yr
Minnesota
$4.344/gal$4,073/yr
Massachusetts
$4.448/gal$4,170/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $4,209/yr | — |
| California | $5.957/gal | $5,585/yrHIGHEST | +$1,376 |
| Texas | $3.888/gal | $3,645/yrLOWEST | $-564 |
| Florida | $4.136/gal | $3,878/yr | $-331 |
| New York | $4.522/gal | $4,239/yr | +$30 |
| Ohio | $4.510/gal | $4,228/yr | +$19 |
| Washington | $5.591/gal | $5,242/yr | +$1,033 |
| Colorado | $4.618/gal | $4,329/yr | +$120 |
| Minnesota | $4.344/gal | $4,073/yr | $-136 |
| Massachusetts | $4.448/gal | $4,170/yr | $-39 |
Calculated at 15,000 miles/year (EPA standard assumption) using 16 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Mercedes-Benz CLS550 MPG History
See how this model's fuel economy changed by year